locking/atomics: COCCINELLE/treewide: Convert trivial ACCESS_ONCE() patterns to READ_ONCE()/WRITE_ONCE()

Please do not apply this to mainline directly, instead please re-run the
coccinelle script shown below and apply its output.

For several reasons, it is desirable to use {READ,WRITE}_ONCE() in
preference to ACCESS_ONCE(), and new code is expected to use one of the
former. So far, there's been no reason to change most existing uses of
ACCESS_ONCE(), as these aren't harmful, and changing them results in
churn.

However, for some features, the read/write distinction is critical to
correct operation. To distinguish these cases, separate read/write
accessors must be used. This patch migrates (most) remaining
ACCESS_ONCE() instances to {READ,WRITE}_ONCE(), using the following
coccinelle script:

----
// Convert trivial ACCESS_ONCE() uses to equivalent READ_ONCE() and
// WRITE_ONCE()

// $ make coccicheck COCCI=/home/mark/once.cocci SPFLAGS="--include-headers" MODE=patch

virtual patch

@ depends on patch @
expression E1, E2;
@@

- ACCESS_ONCE(E1) = E2
+ WRITE_ONCE(E1, E2)

@ depends on patch @
expression E;
@@

- ACCESS_ONCE(E)
+ READ_ONCE(E)
----

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: davem@davemloft.net
Cc: linux-arch@vger.kernel.org
Cc: mpe@ellerman.id.au
Cc: shuah@kernel.org
Cc: snitzer@redhat.com
Cc: thor.thayer@linux.intel.com
Cc: tj@kernel.org
Cc: viro@zeniv.linux.org.uk
Cc: will.deacon@arm.com
Link: http://lkml.kernel.org/r/1508792849-3115-19-git-send-email-paulmck@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

arch/arc/kernel/smp.c

@@ -245,7 +245,7 @@ static void ipi_send_msg_one(int cpu, enum ipi_msg_type msg)
 	 * and read back old value
 	 */
 	do {
-		new = old = ACCESS_ONCE(*ipi_data_ptr);
+		new = old = READ_ONCE(*ipi_data_ptr);
 		new |= 1U << msg;
 	} while (cmpxchg(ipi_data_ptr, old, new) != old);
 

arch/arm/include/asm/spinlock.h

@@ -71,7 +71,7 @@ static inline void arch_spin_lock(arch_spinlock_t *lock)
 
 	while (lockval.tickets.next != lockval.tickets.owner) {
 		wfe();
-		lockval.tickets.owner = ACCESS_ONCE(lock->tickets.owner);
+		lockval.tickets.owner = READ_ONCE(lock->tickets.owner);
 	}
 
 	smp_mb();

arch/arm/mach-tegra/cpuidle-tegra20.c

@@ -179,7 +179,7 @@ static int tegra20_idle_lp2_coupled(struct cpuidle_device *dev,
 	bool entered_lp2 = false;
 
 	if (tegra_pending_sgi())
-		ACCESS_ONCE(abort_flag) = true;
+		WRITE_ONCE(abort_flag, true);
 
 	cpuidle_coupled_parallel_barrier(dev, &abort_barrier);
 

arch/arm/vdso/vgettimeofday.c

@@ -35,7 +35,7 @@ static notrace u32 __vdso_read_begin(const struct vdso_data *vdata)
 {
 	u32 seq;
 repeat:
-	seq = ACCESS_ONCE(vdata->seq_count);
+	seq = READ_ONCE(vdata->seq_count);
 	if (seq & 1) {
 		cpu_relax();
 		goto repeat;

arch/ia64/include/asm/spinlock.h

@@ -61,7 +61,7 @@ static __always_inline void __ticket_spin_lock(arch_spinlock_t *lock)
 
 static __always_inline int __ticket_spin_trylock(arch_spinlock_t *lock)
 {
-	int tmp = ACCESS_ONCE(lock->lock);
+	int tmp = READ_ONCE(lock->lock);
 
 	if (!(((tmp >> TICKET_SHIFT) ^ tmp) & TICKET_MASK))
 		return ia64_cmpxchg(acq, &lock->lock, tmp, tmp + 1, sizeof (tmp)) == tmp;
@@ -73,19 +73,19 @@ static __always_inline void __ticket_spin_unlock(arch_spinlock_t *lock)
 	unsigned short	*p = (unsigned short *)&lock->lock + 1, tmp;
 
 	asm volatile ("ld2.bias %0=[%1]" : "=r"(tmp) : "r"(p));
-	ACCESS_ONCE(*p) = (tmp + 2) & ~1;
+	WRITE_ONCE(*p, (tmp + 2) & ~1);
 }
 
 static inline int __ticket_spin_is_locked(arch_spinlock_t *lock)
 {
-	long tmp = ACCESS_ONCE(lock->lock);
+	long tmp = READ_ONCE(lock->lock);
 
 	return !!(((tmp >> TICKET_SHIFT) ^ tmp) & TICKET_MASK);
 }
 
 static inline int __ticket_spin_is_contended(arch_spinlock_t *lock)
 {
-	long tmp = ACCESS_ONCE(lock->lock);
+	long tmp = READ_ONCE(lock->lock);
 
 	return ((tmp - (tmp >> TICKET_SHIFT)) & TICKET_MASK) > 1;
 }

arch/mips/include/asm/vdso.h

@@ -99,7 +99,7 @@ static inline u32 vdso_data_read_begin(const union mips_vdso_data *data)
 	u32 seq;
 
 	while (true) {
-		seq = ACCESS_ONCE(data->seq_count);
+		seq = READ_ONCE(data->seq_count);
 		if (likely(!(seq & 1))) {
 			/* Paired with smp_wmb() in vdso_data_write_*(). */
 			smp_rmb();

arch/mips/kernel/pm-cps.c

@@ -166,7 +166,7 @@ int cps_pm_enter_state(enum cps_pm_state state)
 	nc_core_ready_count = nc_addr;
 
 	/* Ensure ready_count is zero-initialised before the assembly runs */
-	ACCESS_ONCE(*nc_core_ready_count) = 0;
+	WRITE_ONCE(*nc_core_ready_count, 0);
 	coupled_barrier(&per_cpu(pm_barrier, core), online);
 
 	/* Run the generated entry code */

arch/mn10300/kernel/mn10300-serial.c

@@ -543,7 +543,7 @@ static void mn10300_serial_receive_interrupt(struct mn10300_serial_port *port)
 
 try_again:
 	/* pull chars out of the hat */
-	ix = ACCESS_ONCE(port->rx_outp);
+	ix = READ_ONCE(port->rx_outp);
 	if (CIRC_CNT(port->rx_inp, ix, MNSC_BUFFER_SIZE) == 0) {
 		if (push && !tport->low_latency)
 			tty_flip_buffer_push(tport);
@@ -1724,7 +1724,7 @@ static int mn10300_serial_poll_get_char(struct uart_port *_port)
 	if (mn10300_serial_int_tbl[port->rx_irq].port != NULL) {
 		do {
 			/* pull chars out of the hat */
-			ix = ACCESS_ONCE(port->rx_outp);
+			ix = READ_ONCE(port->rx_outp);
 			if (CIRC_CNT(port->rx_inp, ix, MNSC_BUFFER_SIZE) == 0)
 				return NO_POLL_CHAR;
 

arch/parisc/include/asm/atomic.h

@@ -260,7 +260,7 @@ atomic64_set(atomic64_t *v, s64 i)
 static __inline__ s64
 atomic64_read(const atomic64_t *v)
 {
-	return ACCESS_ONCE((v)->counter);
+	return READ_ONCE((v)->counter);
 }
 
 #define atomic64_inc(v)		(atomic64_add(   1,(v)))

arch/powerpc/platforms/powernv/opal-msglog.c

@@ -43,7 +43,7 @@ ssize_t opal_msglog_copy(char *to, loff_t pos, size_t count)
 	if (!opal_memcons)
 		return -ENODEV;
 
-	out_pos = be32_to_cpu(ACCESS_ONCE(opal_memcons->out_pos));
+	out_pos = be32_to_cpu(READ_ONCE(opal_memcons->out_pos));
 
 	/* Now we've read out_pos, put a barrier in before reading the new
 	 * data it points to in conbuf. */

arch/s390/include/asm/spinlock.h

@@ -117,14 +117,14 @@ extern int _raw_write_trylock_retry(arch_rwlock_t *lp);
 
 static inline int arch_read_trylock_once(arch_rwlock_t *rw)
 {
-	int old = ACCESS_ONCE(rw->lock);
+	int old = READ_ONCE(rw->lock);
 	return likely(old >= 0 &&
 		      __atomic_cmpxchg_bool(&rw->lock, old, old + 1));
 }
 
 static inline int arch_write_trylock_once(arch_rwlock_t *rw)
 {
-	int old = ACCESS_ONCE(rw->lock);
+	int old = READ_ONCE(rw->lock);
 	return likely(old == 0 &&
 		      __atomic_cmpxchg_bool(&rw->lock, 0, 0x80000000));
 }
@@ -211,7 +211,7 @@ static inline void arch_read_unlock(arch_rwlock_t *rw)
 	int old;
 
 	do {
-		old = ACCESS_ONCE(rw->lock);
+		old = READ_ONCE(rw->lock);
 	} while (!__atomic_cmpxchg_bool(&rw->lock, old, old - 1));
 }
 

arch/s390/lib/spinlock.c

@@ -162,8 +162,8 @@ void _raw_read_lock_wait(arch_rwlock_t *rw)
 				smp_yield_cpu(~owner);
 			count = spin_retry;
 		}
-		old = ACCESS_ONCE(rw->lock);
-		owner = ACCESS_ONCE(rw->owner);
+		old = READ_ONCE(rw->lock);
+		owner = READ_ONCE(rw->owner);
 		if (old < 0)
 			continue;
 		if (__atomic_cmpxchg_bool(&rw->lock, old, old + 1))
@@ -178,7 +178,7 @@ int _raw_read_trylock_retry(arch_rwlock_t *rw)
 	int old;
 
 	while (count-- > 0) {
-		old = ACCESS_ONCE(rw->lock);
+		old = READ_ONCE(rw->lock);
 		if (old < 0)
 			continue;
 		if (__atomic_cmpxchg_bool(&rw->lock, old, old + 1))
@@ -202,8 +202,8 @@ void _raw_write_lock_wait(arch_rwlock_t *rw, int prev)
 				smp_yield_cpu(~owner);
 			count = spin_retry;
 		}
-		old = ACCESS_ONCE(rw->lock);
-		owner = ACCESS_ONCE(rw->owner);
+		old = READ_ONCE(rw->lock);
+		owner = READ_ONCE(rw->owner);
 		smp_mb();
 		if (old >= 0) {
 			prev = __RAW_LOCK(&rw->lock, 0x80000000, __RAW_OP_OR);
@@ -230,8 +230,8 @@ void _raw_write_lock_wait(arch_rwlock_t *rw)
 				smp_yield_cpu(~owner);
 			count = spin_retry;
 		}
-		old = ACCESS_ONCE(rw->lock);
-		owner = ACCESS_ONCE(rw->owner);
+		old = READ_ONCE(rw->lock);
+		owner = READ_ONCE(rw->owner);
 		if (old >= 0 &&
 		    __atomic_cmpxchg_bool(&rw->lock, old, old | 0x80000000))
 			prev = old;
@@ -251,7 +251,7 @@ int _raw_write_trylock_retry(arch_rwlock_t *rw)
 	int old;
 
 	while (count-- > 0) {
-		old = ACCESS_ONCE(rw->lock);
+		old = READ_ONCE(rw->lock);
 		if (old)
 			continue;
 		if (__atomic_cmpxchg_bool(&rw->lock, 0, 0x80000000))

arch/sparc/include/asm/atomic_32.h

@@ -31,7 +31,7 @@ void atomic_set(atomic_t *, int);
 
 #define atomic_set_release(v, i)	atomic_set((v), (i))
 
-#define atomic_read(v)          ACCESS_ONCE((v)->counter)
+#define atomic_read(v)          READ_ONCE((v)->counter)
 
 #define atomic_add(i, v)	((void)atomic_add_return( (int)(i), (v)))
 #define atomic_sub(i, v)	((void)atomic_add_return(-(int)(i), (v)))

arch/tile/gxio/dma_queue.c

@@ -163,14 +163,14 @@ int __gxio_dma_queue_is_complete(__gxio_dma_queue_t *dma_queue,
 				 int64_t completion_slot, int update)
 {
 	if (update) {
-		if (ACCESS_ONCE(dma_queue->hw_complete_count) >
+		if (READ_ONCE(dma_queue->hw_complete_count) >
 		    completion_slot)
 			return 1;
 
 		__gxio_dma_queue_update_credits(dma_queue);
 	}
 
-	return ACCESS_ONCE(dma_queue->hw_complete_count) > completion_slot;
+	return READ_ONCE(dma_queue->hw_complete_count) > completion_slot;
 }
 
 EXPORT_SYMBOL_GPL(__gxio_dma_queue_is_complete);

arch/tile/include/gxio/dma_queue.h

@@ -121,7 +121,7 @@ static inline int64_t __gxio_dma_queue_reserve(__gxio_dma_queue_t *dma_queue,
 		 * if the result is LESS than "hw_complete_count".
 		 */
 		uint64_t complete;
-		complete = ACCESS_ONCE(dma_queue->hw_complete_count);
+		complete = READ_ONCE(dma_queue->hw_complete_count);
 		slot |= (complete & 0xffffffffff000000);
 		if (slot < complete)
 			slot += 0x1000000;

arch/tile/kernel/ptrace.c

@@ -255,7 +255,7 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
 
 int do_syscall_trace_enter(struct pt_regs *regs)
 {
-	u32 work = ACCESS_ONCE(current_thread_info()->flags);
+	u32 work = READ_ONCE(current_thread_info()->flags);
 
 	if ((work & _TIF_SYSCALL_TRACE) &&
 	    tracehook_report_syscall_entry(regs)) {

arch/x86/entry/common.c

@@ -75,7 +75,7 @@ static long syscall_trace_enter(struct pt_regs *regs)
 	if (IS_ENABLED(CONFIG_DEBUG_ENTRY))
 		BUG_ON(regs != task_pt_regs(current));
 
-	work = ACCESS_ONCE(ti->flags) & _TIF_WORK_SYSCALL_ENTRY;
+	work = READ_ONCE(ti->flags) & _TIF_WORK_SYSCALL_ENTRY;
 
 	if (unlikely(work & _TIF_SYSCALL_EMU))
 		emulated = true;

arch/x86/entry/vdso/vclock_gettime.c

@@ -318,7 +318,7 @@ int gettimeofday(struct timeval *, struct timezone *)
 notrace time_t __vdso_time(time_t *t)
 {
 	/* This is atomic on x86 so we don't need any locks. */
-	time_t result = ACCESS_ONCE(gtod->wall_time_sec);
+	time_t result = READ_ONCE(gtod->wall_time_sec);
 
 	if (t)
 		*t = result;

arch/x86/events/core.c

@@ -2118,7 +2118,7 @@ static int x86_pmu_event_init(struct perf_event *event)
 			event->destroy(event);
 	}
 
-	if (ACCESS_ONCE(x86_pmu.attr_rdpmc))
+	if (READ_ONCE(x86_pmu.attr_rdpmc))
 		event->hw.flags |= PERF_X86_EVENT_RDPMC_ALLOWED;
 
 	return err;

arch/x86/include/asm/vgtod.h

@@ -48,7 +48,7 @@ static inline unsigned gtod_read_begin(const struct vsyscall_gtod_data *s)
 	unsigned ret;
 
 repeat:
-	ret = ACCESS_ONCE(s->seq);
+	ret = READ_ONCE(s->seq);
 	if (unlikely(ret & 1)) {
 		cpu_relax();
 		goto repeat;

arch/x86/kernel/espfix_64.c

@@ -155,14 +155,14 @@ void init_espfix_ap(int cpu)
 	page = cpu/ESPFIX_STACKS_PER_PAGE;
 
 	/* Did another CPU already set this up? */
-	stack_page = ACCESS_ONCE(espfix_pages[page]);
+	stack_page = READ_ONCE(espfix_pages[page]);
 	if (likely(stack_page))
 		goto done;
 
 	mutex_lock(&espfix_init_mutex);
 
 	/* Did we race on the lock? */
-	stack_page = ACCESS_ONCE(espfix_pages[page]);
+	stack_page = READ_ONCE(espfix_pages[page]);
 	if (stack_page)
 		goto unlock_done;
 
@@ -200,7 +200,7 @@ void init_espfix_ap(int cpu)
 		set_pte(&pte_p[n*PTE_STRIDE], pte);
 
 	/* Job is done for this CPU and any CPU which shares this page */
-	ACCESS_ONCE(espfix_pages[page]) = stack_page;
+	WRITE_ONCE(espfix_pages[page], stack_page);
 
 unlock_done:
 	mutex_unlock(&espfix_init_mutex);

arch/x86/kernel/nmi.c

@@ -105,7 +105,7 @@ static void nmi_max_handler(struct irq_work *w)
 {
 	struct nmiaction *a = container_of(w, struct nmiaction, irq_work);
 	int remainder_ns, decimal_msecs;
-	u64 whole_msecs = ACCESS_ONCE(a->max_duration);
+	u64 whole_msecs = READ_ONCE(a->max_duration);
 
 	remainder_ns = do_div(whole_msecs, (1000 * 1000));
 	decimal_msecs = remainder_ns / 1000;

arch/x86/kvm/mmu.c

@@ -443,7 +443,7 @@ static u64 __update_clear_spte_slow(u64 *sptep, u64 spte)
 
 static u64 __get_spte_lockless(u64 *sptep)
 {
-	return ACCESS_ONCE(*sptep);
+	return READ_ONCE(*sptep);
 }
 #else
 union split_spte {
@@ -4819,7 +4819,7 @@ static void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
 	 * If we don't have indirect shadow pages, it means no page is
 	 * write-protected, so we can exit simply.
 	 */
-	if (!ACCESS_ONCE(vcpu->kvm->arch.indirect_shadow_pages))
+	if (!READ_ONCE(vcpu->kvm->arch.indirect_shadow_pages))
 		return;
 
 	remote_flush = local_flush = false;

arch/x86/kvm/page_track.c

@@ -157,7 +157,7 @@ bool kvm_page_track_is_active(struct kvm_vcpu *vcpu, gfn_t gfn,
 		return false;
 
 	index = gfn_to_index(gfn, slot->base_gfn, PT_PAGE_TABLE_LEVEL);
-	return !!ACCESS_ONCE(slot->arch.gfn_track[mode][index]);
+	return !!READ_ONCE(slot->arch.gfn_track[mode][index]);
 }
 
 void kvm_page_track_cleanup(struct kvm *kvm)

arch/x86/xen/p2m.c

@@ -547,7 +547,7 @@ int xen_alloc_p2m_entry(unsigned long pfn)
 	if (p2m_top_mfn && pfn < MAX_P2M_PFN) {
 		topidx = p2m_top_index(pfn);
 		top_mfn_p = &p2m_top_mfn[topidx];
-		mid_mfn = ACCESS_ONCE(p2m_top_mfn_p[topidx]);
+		mid_mfn = READ_ONCE(p2m_top_mfn_p[topidx]);
 
 		BUG_ON(virt_to_mfn(mid_mfn) != *top_mfn_p);
 

arch/xtensa/platforms/xtfpga/lcd.c

@@ -34,23 +34,23 @@
 static void lcd_put_byte(u8 *addr, u8 data)
 {
 #ifdef CONFIG_XTFPGA_LCD_8BIT_ACCESS
-	ACCESS_ONCE(*addr) = data;
+	WRITE_ONCE(*addr, data);
 #else
-	ACCESS_ONCE(*addr) = data & 0xf0;
-	ACCESS_ONCE(*addr) = (data << 4) & 0xf0;
+	WRITE_ONCE(*addr, data & 0xf0);
+	WRITE_ONCE(*addr, (data << 4) & 0xf0);
 #endif
 }
 
 static int __init lcd_init(void)
 {
-	ACCESS_ONCE(*LCD_INSTR_ADDR) = LCD_DISPLAY_MODE8BIT;
+	WRITE_ONCE(*LCD_INSTR_ADDR, LCD_DISPLAY_MODE8BIT);
 	mdelay(5);
-	ACCESS_ONCE(*LCD_INSTR_ADDR) = LCD_DISPLAY_MODE8BIT;
+	WRITE_ONCE(*LCD_INSTR_ADDR, LCD_DISPLAY_MODE8BIT);
 	udelay(200);
-	ACCESS_ONCE(*LCD_INSTR_ADDR) = LCD_DISPLAY_MODE8BIT;
+	WRITE_ONCE(*LCD_INSTR_ADDR, LCD_DISPLAY_MODE8BIT);
 	udelay(50);
 #ifndef CONFIG_XTFPGA_LCD_8BIT_ACCESS
-	ACCESS_ONCE(*LCD_INSTR_ADDR) = LCD_DISPLAY_MODE4BIT;
+	WRITE_ONCE(*LCD_INSTR_ADDR, LCD_DISPLAY_MODE4BIT);
 	udelay(50);
 	lcd_put_byte(LCD_INSTR_ADDR, LCD_DISPLAY_MODE4BIT);
 	udelay(50);

block/blk-wbt.c

@@ -261,7 +261,7 @@ static inline bool stat_sample_valid(struct blk_rq_stat *stat)
 
 static u64 rwb_sync_issue_lat(struct rq_wb *rwb)
 {
-	u64 now, issue = ACCESS_ONCE(rwb->sync_issue);
+	u64 now, issue = READ_ONCE(rwb->sync_issue);
 
 	if (!issue || !rwb->sync_cookie)
 		return 0;

drivers/base/core.c

@@ -668,7 +668,7 @@ const char *dev_driver_string(const struct device *dev)
 	 * so be careful about accessing it.  dev->bus and dev->class should
 	 * never change once they are set, so they don't need special care.
 	 */
-	drv = ACCESS_ONCE(dev->driver);
+	drv = READ_ONCE(dev->driver);
 	return drv ? drv->name :
 			(dev->bus ? dev->bus->name :
 			(dev->class ? dev->class->name : ""));

drivers/base/power/runtime.c

@@ -134,11 +134,11 @@ unsigned long pm_runtime_autosuspend_expiration(struct device *dev)
 	if (!dev->power.use_autosuspend)
 		goto out;
 
-	autosuspend_delay = ACCESS_ONCE(dev->power.autosuspend_delay);
+	autosuspend_delay = READ_ONCE(dev->power.autosuspend_delay);
 	if (autosuspend_delay < 0)
 		goto out;
 
-	last_busy = ACCESS_ONCE(dev->power.last_busy);
+	last_busy = READ_ONCE(dev->power.last_busy);
 	elapsed = jiffies - last_busy;
 	if (elapsed < 0)
 		goto out;	/* jiffies has wrapped around. */

drivers/char/random.c

@@ -641,7 +641,7 @@ static void credit_entropy_bits(struct entropy_store *r, int nbits)
 		return;
 
 retry:
-	entropy_count = orig = ACCESS_ONCE(r->entropy_count);
+	entropy_count = orig = READ_ONCE(r->entropy_count);
 	if (nfrac < 0) {
 		/* Debit */
 		entropy_count += nfrac;
@@ -1265,7 +1265,7 @@ static size_t account(struct entropy_store *r, size_t nbytes, int min,
 
 	/* Can we pull enough? */
 retry:
-	entropy_count = orig = ACCESS_ONCE(r->entropy_count);
+	entropy_count = orig = READ_ONCE(r->entropy_count);
 	ibytes = nbytes;
 	/* never pull more than available */
 	have_bytes = entropy_count >> (ENTROPY_SHIFT + 3);

drivers/clocksource/bcm2835_timer.c

@@ -71,7 +71,7 @@ static irqreturn_t bcm2835_time_interrupt(int irq, void *dev_id)
 	if (readl_relaxed(timer->control) & timer->match_mask) {
 		writel_relaxed(timer->match_mask, timer->control);
 
-		event_handler = ACCESS_ONCE(timer->evt.event_handler);
+		event_handler = READ_ONCE(timer->evt.event_handler);
 		if (event_handler)
 			event_handler(&timer->evt);
 		return IRQ_HANDLED;

drivers/crypto/caam/jr.c

@@ -172,7 +172,7 @@ static void caam_jr_dequeue(unsigned long devarg)
 
 	while (rd_reg32(&jrp->rregs->outring_used)) {
 
-		head = ACCESS_ONCE(jrp->head);
+		head = READ_ONCE(jrp->head);
 
 		spin_lock(&jrp->outlock);
 
@@ -341,7 +341,7 @@ int caam_jr_enqueue(struct device *dev, u32 *desc,
 	spin_lock_bh(&jrp->inplock);
 
 	head = jrp->head;
-	tail = ACCESS_ONCE(jrp->tail);
+	tail = READ_ONCE(jrp->tail);
 
 	if (!rd_reg32(&jrp->rregs->inpring_avail) ||
 	    CIRC_SPACE(head, tail, JOBR_DEPTH) <= 0) {

drivers/crypto/nx/nx-842-powernv.c

@@ -193,7 +193,7 @@ static int wait_for_csb(struct nx842_workmem *wmem,
 	ktime_t start = wmem->start, now = ktime_get();
 	ktime_t timeout = ktime_add_ms(start, CSB_WAIT_MAX);
 
-	while (!(ACCESS_ONCE(csb->flags) & CSB_V)) {
+	while (!(READ_ONCE(csb->flags) & CSB_V)) {
 		cpu_relax();
 		now = ktime_get();
 		if (ktime_after(now, timeout))

drivers/firewire/ohci.c

@@ -734,7 +734,7 @@ static unsigned int ar_search_last_active_buffer(struct ar_context *ctx,
 	__le16 res_count, next_res_count;
 
 	i = ar_first_buffer_index(ctx);
-	res_count = ACCESS_ONCE(ctx->descriptors[i].res_count);
+	res_count = READ_ONCE(ctx->descriptors[i].res_count);
 
 	/* A buffer that is not yet completely filled must be the last one. */
 	while (i != last && res_count == 0) {
@@ -742,8 +742,7 @@ static unsigned int ar_search_last_active_buffer(struct ar_context *ctx,
 		/* Peek at the next descriptor. */
 		next_i = ar_next_buffer_index(i);
 		rmb(); /* read descriptors in order */
-		next_res_count = ACCESS_ONCE(
-				ctx->descriptors[next_i].res_count);
+		next_res_count = READ_ONCE(ctx->descriptors[next_i].res_count);
 		/*
 		 * If the next descriptor is still empty, we must stop at this
 		 * descriptor.
@@ -759,8 +758,7 @@ static unsigned int ar_search_last_active_buffer(struct ar_context *ctx,
 			if (MAX_AR_PACKET_SIZE > PAGE_SIZE && i != last) {
 				next_i = ar_next_buffer_index(next_i);
 				rmb();
-				next_res_count = ACCESS_ONCE(
-					ctx->descriptors[next_i].res_count);
+				next_res_count = READ_ONCE(ctx->descriptors[next_i].res_count);
 				if (next_res_count != cpu_to_le16(PAGE_SIZE))
 					goto next_buffer_is_active;
 			}
@@ -2812,7 +2810,7 @@ static int handle_ir_buffer_fill(struct context *context,
 	u32 buffer_dma;
 
 	req_count = le16_to_cpu(last->req_count);
-	res_count = le16_to_cpu(ACCESS_ONCE(last->res_count));
+	res_count = le16_to_cpu(READ_ONCE(last->res_count));
 	completed = req_count - res_count;
 	buffer_dma = le32_to_cpu(last->data_address);
 

drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c

@@ -260,7 +260,7 @@ static void amdgpu_fence_fallback(unsigned long arg)
  */
 int amdgpu_fence_wait_empty(struct amdgpu_ring *ring)
 {
-	uint64_t seq = ACCESS_ONCE(ring->fence_drv.sync_seq);
+	uint64_t seq = READ_ONCE(ring->fence_drv.sync_seq);
 	struct dma_fence *fence, **ptr;
 	int r;
 
@@ -300,7 +300,7 @@ unsigned amdgpu_fence_count_emitted(struct amdgpu_ring *ring)
 	amdgpu_fence_process(ring);
 	emitted = 0x100000000ull;
 	emitted -= atomic_read(&ring->fence_drv.last_seq);
-	emitted += ACCESS_ONCE(ring->fence_drv.sync_seq);
+	emitted += READ_ONCE(ring->fence_drv.sync_seq);
 	return lower_32_bits(emitted);
 }
 

drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c

@@ -788,11 +788,11 @@ static int amdgpu_debugfs_gem_bo_info(int id, void *ptr, void *data)
 	seq_printf(m, "\t0x%08x: %12ld byte %s",
 		   id, amdgpu_bo_size(bo), placement);
 
-	offset = ACCESS_ONCE(bo->tbo.mem.start);
+	offset = READ_ONCE(bo->tbo.mem.start);
 	if (offset != AMDGPU_BO_INVALID_OFFSET)
 		seq_printf(m, " @ 0x%010Lx", offset);
 
-	pin_count = ACCESS_ONCE(bo->pin_count);
+	pin_count = READ_ONCE(bo->pin_count);
 	if (pin_count)
 		seq_printf(m, " pin count %d", pin_count);
 	seq_printf(m, "\n");

drivers/gpu/drm/amd/scheduler/gpu_scheduler.c

@@ -187,7 +187,7 @@ static bool amd_sched_entity_is_ready(struct amd_sched_entity *entity)
 	if (kfifo_is_empty(&entity->job_queue))
 		return false;
 
-	if (ACCESS_ONCE(entity->dependency))
+	if (READ_ONCE(entity->dependency))
 		return false;
 
 	return true;

drivers/gpu/drm/radeon/radeon_gem.c

@@ -451,7 +451,7 @@ int radeon_gem_busy_ioctl(struct drm_device *dev, void *data,
 	else
 		r = 0;
 
-	cur_placement = ACCESS_ONCE(robj->tbo.mem.mem_type);
+	cur_placement = READ_ONCE(robj->tbo.mem.mem_type);
 	args->domain = radeon_mem_type_to_domain(cur_placement);
 	drm_gem_object_put_unlocked(gobj);
 	return r;
@@ -481,7 +481,7 @@ int radeon_gem_wait_idle_ioctl(struct drm_device *dev, void *data,
 		r = ret;
 
 	/* Flush HDP cache via MMIO if necessary */
-	cur_placement = ACCESS_ONCE(robj->tbo.mem.mem_type);
+	cur_placement = READ_ONCE(robj->tbo.mem.mem_type);
 	if (rdev->asic->mmio_hdp_flush &&
 	    radeon_mem_type_to_domain(cur_placement) == RADEON_GEM_DOMAIN_VRAM)
 		robj->rdev->asic->mmio_hdp_flush(rdev);

drivers/gpu/drm/vmwgfx/vmwgfx_surface.c

@@ -904,7 +904,7 @@ vmw_surface_handle_reference(struct vmw_private *dev_priv,
 		if (unlikely(drm_is_render_client(file_priv)))
 			require_exist = true;
 
-		if (ACCESS_ONCE(vmw_fpriv(file_priv)->locked_master)) {
+		if (READ_ONCE(vmw_fpriv(file_priv)->locked_master)) {
 			DRM_ERROR("Locked master refused legacy "
 				  "surface reference.\n");
 			return -EACCES;

drivers/infiniband/hw/hfi1/file_ops.c

@@ -380,7 +380,7 @@ static long hfi1_file_ioctl(struct file *fp, unsigned int cmd,
 		if (sc->flags & SCF_FROZEN) {
 			wait_event_interruptible_timeout(
 				dd->event_queue,
-				!(ACCESS_ONCE(dd->flags) & HFI1_FROZEN),
+				!(READ_ONCE(dd->flags) & HFI1_FROZEN),
 				msecs_to_jiffies(SEND_CTXT_HALT_TIMEOUT));
 			if (dd->flags & HFI1_FROZEN)
 				return -ENOLCK;

drivers/infiniband/hw/hfi1/pio.c

@@ -1423,14 +1423,14 @@ retry:
 			goto done;
 		}
 		/* copy from receiver cache line and recalculate */
-		sc->alloc_free = ACCESS_ONCE(sc->free);
+		sc->alloc_free = READ_ONCE(sc->free);
 		avail =
 			(unsigned long)sc->credits -
 			(sc->fill - sc->alloc_free);
 		if (blocks > avail) {
 			/* still no room, actively update */
 			sc_release_update(sc);
-			sc->alloc_free = ACCESS_ONCE(sc->free);
+			sc->alloc_free = READ_ONCE(sc->free);
 			trycount++;
 			goto retry;
 		}
@@ -1667,7 +1667,7 @@ void sc_release_update(struct send_context *sc)
 
 	/* call sent buffer callbacks */
 	code = -1;				/* code not yet set */
-	head = ACCESS_ONCE(sc->sr_head);	/* snapshot the head */
+	head = READ_ONCE(sc->sr_head);	/* snapshot the head */
 	tail = sc->sr_tail;
 	while (head != tail) {
 		pbuf = &sc->sr[tail].pbuf;

drivers/infiniband/hw/hfi1/ruc.c

@@ -363,7 +363,7 @@ static void ruc_loopback(struct rvt_qp *sqp)
 
 again:
 	smp_read_barrier_depends(); /* see post_one_send() */
-	if (sqp->s_last == ACCESS_ONCE(sqp->s_head))
+	if (sqp->s_last == READ_ONCE(sqp->s_head))
 		goto clr_busy;
 	wqe = rvt_get_swqe_ptr(sqp, sqp->s_last);
 

drivers/infiniband/hw/hfi1/sdma.c

@@ -1725,7 +1725,7 @@ retry:
 
 		swhead = sde->descq_head & sde->sdma_mask;
 		/* this code is really bad for cache line trading */
-		swtail = ACCESS_ONCE(sde->descq_tail) & sde->sdma_mask;
+		swtail = READ_ONCE(sde->descq_tail) & sde->sdma_mask;
 		cnt = sde->descq_cnt;
 
 		if (swhead < swtail)
@@ -1872,7 +1872,7 @@ retry:
 	if ((status & sde->idle_mask) && !idle_check_done) {
 		u16 swtail;
 
-		swtail = ACCESS_ONCE(sde->descq_tail) & sde->sdma_mask;
+		swtail = READ_ONCE(sde->descq_tail) & sde->sdma_mask;
 		if (swtail != hwhead) {
 			hwhead = (u16)read_sde_csr(sde, SD(HEAD));
 			idle_check_done = 1;
@@ -2222,7 +2222,7 @@ void sdma_seqfile_dump_sde(struct seq_file *s, struct sdma_engine *sde)
 	u16 len;
 
 	head = sde->descq_head & sde->sdma_mask;
-	tail = ACCESS_ONCE(sde->descq_tail) & sde->sdma_mask;
+	tail = READ_ONCE(sde->descq_tail) & sde->sdma_mask;
 	seq_printf(s, SDE_FMT, sde->this_idx,
 		   sde->cpu,
 		   sdma_state_name(sde->state.current_state),
@@ -3305,7 +3305,7 @@ int sdma_ahg_alloc(struct sdma_engine *sde)
 		return -EINVAL;
 	}
 	while (1) {
-		nr = ffz(ACCESS_ONCE(sde->ahg_bits));
+		nr = ffz(READ_ONCE(sde->ahg_bits));
 		if (nr > 31) {
 			trace_hfi1_ahg_allocate(sde, -ENOSPC);
 			return -ENOSPC;

drivers/infiniband/hw/hfi1/sdma.h

@@ -445,7 +445,7 @@ static inline u16 sdma_descq_freecnt(struct sdma_engine *sde)
 {
 	return sde->descq_cnt -
 		(sde->descq_tail -
-		 ACCESS_ONCE(sde->descq_head)) - 1;
+		 READ_ONCE(sde->descq_head)) - 1;
 }
 
 static inline u16 sdma_descq_inprocess(struct sdma_engine *sde)

drivers/infiniband/hw/hfi1/uc.c

@@ -80,7 +80,7 @@ int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps)
 			goto bail;
 		/* We are in the error state, flush the work request. */
 		smp_read_barrier_depends(); /* see post_one_send() */
-		if (qp->s_last == ACCESS_ONCE(qp->s_head))
+		if (qp->s_last == READ_ONCE(qp->s_head))
 			goto bail;
 		/* If DMAs are in progress, we can't flush immediately. */
 		if (iowait_sdma_pending(&priv->s_iowait)) {
@@ -121,7 +121,7 @@ int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps)
 			goto bail;
 		/* Check if send work queue is empty. */
 		smp_read_barrier_depends(); /* see post_one_send() */
-		if (qp->s_cur == ACCESS_ONCE(qp->s_head)) {
+		if (qp->s_cur == READ_ONCE(qp->s_head)) {
 			clear_ahg(qp);
 			goto bail;
 		}

drivers/infiniband/hw/hfi1/ud.c

@@ -487,7 +487,7 @@ int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps)
 			goto bail;
 		/* We are in the error state, flush the work request. */
 		smp_read_barrier_depends(); /* see post_one_send */
-		if (qp->s_last == ACCESS_ONCE(qp->s_head))
+		if (qp->s_last == READ_ONCE(qp->s_head))
 			goto bail;
 		/* If DMAs are in progress, we can't flush immediately. */
 		if (iowait_sdma_pending(&priv->s_iowait)) {
@@ -501,7 +501,7 @@ int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps)
 
 	/* see post_one_send() */
 	smp_read_barrier_depends();
-	if (qp->s_cur == ACCESS_ONCE(qp->s_head))
+	if (qp->s_cur == READ_ONCE(qp->s_head))
 		goto bail;
 
 	wqe = rvt_get_swqe_ptr(qp, qp->s_cur);

drivers/infiniband/hw/hfi1/user_sdma.c

@@ -276,7 +276,7 @@ int hfi1_user_sdma_free_queues(struct hfi1_filedata *fd,
 		/* Wait until all requests have been freed. */
 		wait_event_interruptible(
 			pq->wait,
-			(ACCESS_ONCE(pq->state) == SDMA_PKT_Q_INACTIVE));
+			(READ_ONCE(pq->state) == SDMA_PKT_Q_INACTIVE));
 		kfree(pq->reqs);
 		kfree(pq->req_in_use);
 		kmem_cache_destroy(pq->txreq_cache);
@@ -591,7 +591,7 @@ int hfi1_user_sdma_process_request(struct hfi1_filedata *fd,
 			if (ret != -EBUSY) {
 				req->status = ret;
 				WRITE_ONCE(req->has_error, 1);
-				if (ACCESS_ONCE(req->seqcomp) ==
+				if (READ_ONCE(req->seqcomp) ==
 				    req->seqsubmitted - 1)
 					goto free_req;
 				return ret;
@@ -825,7 +825,7 @@ static int user_sdma_send_pkts(struct user_sdma_request *req, unsigned maxpkts)
 		 */
 		if (req->data_len) {
 			iovec = &req->iovs[req->iov_idx];
-			if (ACCESS_ONCE(iovec->offset) == iovec->iov.iov_len) {
+			if (READ_ONCE(iovec->offset) == iovec->iov.iov_len) {
 				if (++req->iov_idx == req->data_iovs) {
 					ret = -EFAULT;
 					goto free_txreq;
@@ -1390,7 +1390,7 @@ static void user_sdma_txreq_cb(struct sdma_txreq *txreq, int status)
 	} else {
 		if (status != SDMA_TXREQ_S_OK)
 			req->status = status;
-		if (req->seqcomp == (ACCESS_ONCE(req->seqsubmitted) - 1) &&
+		if (req->seqcomp == (READ_ONCE(req->seqsubmitted) - 1) &&
 		    (READ_ONCE(req->done) ||
 		     READ_ONCE(req->has_error))) {
 			user_sdma_free_request(req, false);

drivers/infiniband/hw/qib/qib_ruc.c

@@ -368,7 +368,7 @@ static void qib_ruc_loopback(struct rvt_qp *sqp)
 
 again:
 	smp_read_barrier_depends(); /* see post_one_send() */
-	if (sqp->s_last == ACCESS_ONCE(sqp->s_head))
+	if (sqp->s_last == READ_ONCE(sqp->s_head))
 		goto clr_busy;
 	wqe = rvt_get_swqe_ptr(sqp, sqp->s_last);
 

drivers/infiniband/hw/qib/qib_uc.c

@@ -61,7 +61,7 @@ int qib_make_uc_req(struct rvt_qp *qp, unsigned long *flags)
 			goto bail;
 		/* We are in the error state, flush the work request. */
 		smp_read_barrier_depends(); /* see post_one_send() */
-		if (qp->s_last == ACCESS_ONCE(qp->s_head))
+		if (qp->s_last == READ_ONCE(qp->s_head))
 			goto bail;
 		/* If DMAs are in progress, we can't flush immediately. */
 		if (atomic_read(&priv->s_dma_busy)) {
@@ -91,7 +91,7 @@ int qib_make_uc_req(struct rvt_qp *qp, unsigned long *flags)
 			goto bail;
 		/* Check if send work queue is empty. */
 		smp_read_barrier_depends(); /* see post_one_send() */
-		if (qp->s_cur == ACCESS_ONCE(qp->s_head))
+		if (qp->s_cur == READ_ONCE(qp->s_head))
 			goto bail;
 		/*
 		 * Start a new request.

drivers/infiniband/hw/qib/qib_ud.c

@@ -253,7 +253,7 @@ int qib_make_ud_req(struct rvt_qp *qp, unsigned long *flags)
 			goto bail;
 		/* We are in the error state, flush the work request. */
 		smp_read_barrier_depends(); /* see post_one_send */
-		if (qp->s_last == ACCESS_ONCE(qp->s_head))
+		if (qp->s_last == READ_ONCE(qp->s_head))
 			goto bail;
 		/* If DMAs are in progress, we can't flush immediately. */
 		if (atomic_read(&priv->s_dma_busy)) {
@@ -267,7 +267,7 @@ int qib_make_ud_req(struct rvt_qp *qp, unsigned long *flags)
 
 	/* see post_one_send() */
 	smp_read_barrier_depends();
-	if (qp->s_cur == ACCESS_ONCE(qp->s_head))
+	if (qp->s_cur == READ_ONCE(qp->s_head))
 		goto bail;
 
 	wqe = rvt_get_swqe_ptr(qp, qp->s_cur);

drivers/infiniband/sw/rdmavt/qp.c

@@ -1073,7 +1073,7 @@ int rvt_error_qp(struct rvt_qp *qp, enum ib_wc_status err)
 	rdi->driver_f.notify_error_qp(qp);
 
 	/* Schedule the sending tasklet to drain the send work queue. */
-	if (ACCESS_ONCE(qp->s_last) != qp->s_head)
+	if (READ_ONCE(qp->s_last) != qp->s_head)
 		rdi->driver_f.schedule_send(qp);
 
 	rvt_clear_mr_refs(qp, 0);
@@ -1686,7 +1686,7 @@ static inline int rvt_qp_is_avail(
 	if (likely(qp->s_avail))
 		return 0;
 	smp_read_barrier_depends(); /* see rc.c */
-	slast = ACCESS_ONCE(qp->s_last);
+	slast = READ_ONCE(qp->s_last);
 	if (qp->s_head >= slast)
 		avail = qp->s_size - (qp->s_head - slast);
 	else
@@ -1917,7 +1917,7 @@ int rvt_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
 	 * ahead and kick the send engine into gear. Otherwise we will always
 	 * just schedule the send to happen later.
 	 */
-	call_send = qp->s_head == ACCESS_ONCE(qp->s_last) && !wr->next;
+	call_send = qp->s_head == READ_ONCE(qp->s_last) && !wr->next;
 
 	for (; wr; wr = wr->next) {
 		err = rvt_post_one_wr(qp, wr, &call_send);

drivers/input/misc/regulator-haptic.c

@@ -233,7 +233,7 @@ static int __maybe_unused regulator_haptic_resume(struct device *dev)
 
 	haptic->suspended = false;
 
-	magnitude = ACCESS_ONCE(haptic->magnitude);
+	magnitude = READ_ONCE(haptic->magnitude);
 	if (magnitude)
 		regulator_haptic_set_voltage(haptic, magnitude);
 

drivers/md/dm-bufio.c

@@ -347,7 +347,7 @@ static void __cache_size_refresh(void)
 	BUG_ON(!mutex_is_locked(&dm_bufio_clients_lock));
 	BUG_ON(dm_bufio_client_count < 0);
 
-	dm_bufio_cache_size_latch = ACCESS_ONCE(dm_bufio_cache_size);
+	dm_bufio_cache_size_latch = READ_ONCE(dm_bufio_cache_size);
 
 	/*
 	 * Use default if set to 0 and report the actual cache size used.
@@ -960,7 +960,7 @@ static void __get_memory_limit(struct dm_bufio_client *c,
 {
 	unsigned long buffers;
 
-	if (unlikely(ACCESS_ONCE(dm_bufio_cache_size) != dm_bufio_cache_size_latch)) {
+	if (unlikely(READ_ONCE(dm_bufio_cache_size) != dm_bufio_cache_size_latch)) {
 		if (mutex_trylock(&dm_bufio_clients_lock)) {
 			__cache_size_refresh();
 			mutex_unlock(&dm_bufio_clients_lock);
@@ -1600,7 +1600,7 @@ static bool __try_evict_buffer(struct dm_buffer *b, gfp_t gfp)
 
 static unsigned long get_retain_buffers(struct dm_bufio_client *c)
 {
-        unsigned long retain_bytes = ACCESS_ONCE(dm_bufio_retain_bytes);
+        unsigned long retain_bytes = READ_ONCE(dm_bufio_retain_bytes);
         return retain_bytes >> (c->sectors_per_block_bits + SECTOR_SHIFT);
 }
 
@@ -1647,7 +1647,7 @@ dm_bufio_shrink_count(struct shrinker *shrink, struct shrink_control *sc)
 {
 	struct dm_bufio_client *c = container_of(shrink, struct dm_bufio_client, shrinker);
 
-	return ACCESS_ONCE(c->n_buffers[LIST_CLEAN]) + ACCESS_ONCE(c->n_buffers[LIST_DIRTY]);
+	return READ_ONCE(c->n_buffers[LIST_CLEAN]) + READ_ONCE(c->n_buffers[LIST_DIRTY]);
 }
 
 /*
@@ -1818,7 +1818,7 @@ EXPORT_SYMBOL_GPL(dm_bufio_set_sector_offset);
 
 static unsigned get_max_age_hz(void)
 {
-	unsigned max_age = ACCESS_ONCE(dm_bufio_max_age);
+	unsigned max_age = READ_ONCE(dm_bufio_max_age);
 
 	if (max_age > UINT_MAX / HZ)
 		max_age = UINT_MAX / HZ;

drivers/md/dm-kcopyd.c

@@ -107,7 +107,7 @@ static void io_job_start(struct dm_kcopyd_throttle *t)
 try_again:
 	spin_lock_irq(&throttle_spinlock);
 
-	throttle = ACCESS_ONCE(t->throttle);
+	throttle = READ_ONCE(t->throttle);
 
 	if (likely(throttle >= 100))
 		goto skip_limit;
@@ -157,7 +157,7 @@ static void io_job_finish(struct dm_kcopyd_throttle *t)
 
 	t->num_io_jobs--;
 
-	if (likely(ACCESS_ONCE(t->throttle) >= 100))
+	if (likely(READ_ONCE(t->throttle) >= 100))
 		goto skip_limit;
 
 	if (!t->num_io_jobs) {

drivers/md/dm-stats.c

@@ -431,7 +431,7 @@ do_sync_free:
 		synchronize_rcu_expedited();
 		dm_stat_free(&s->rcu_head);
 	} else {
-		ACCESS_ONCE(dm_stat_need_rcu_barrier) = 1;
+		WRITE_ONCE(dm_stat_need_rcu_barrier, 1);
 		call_rcu(&s->rcu_head, dm_stat_free);
 	}
 	return 0;
@@ -639,12 +639,12 @@ void dm_stats_account_io(struct dm_stats *stats, unsigned long bi_rw,
 		 */
 		last = raw_cpu_ptr(stats->last);
 		stats_aux->merged =
-			(bi_sector == (ACCESS_ONCE(last->last_sector) &&
+			(bi_sector == (READ_ONCE(last->last_sector) &&
 				       ((bi_rw == WRITE) ==
-					(ACCESS_ONCE(last->last_rw) == WRITE))
+					(READ_ONCE(last->last_rw) == WRITE))
 				       ));
-		ACCESS_ONCE(last->last_sector) = end_sector;
-		ACCESS_ONCE(last->last_rw) = bi_rw;
+		WRITE_ONCE(last->last_sector, end_sector);
+		WRITE_ONCE(last->last_rw, bi_rw);
 	}
 
 	rcu_read_lock();
@@ -693,22 +693,22 @@ static void __dm_stat_init_temporary_percpu_totals(struct dm_stat_shared *shared
 
 	for_each_possible_cpu(cpu) {
 		p = &s->stat_percpu[cpu][x];
-		shared->tmp.sectors[READ] += ACCESS_ONCE(p->sectors[READ]);
-		shared->tmp.sectors[WRITE] += ACCESS_ONCE(p->sectors[WRITE]);
-		shared->tmp.ios[READ] += ACCESS_ONCE(p->ios[READ]);
-		shared->tmp.ios[WRITE] += ACCESS_ONCE(p->ios[WRITE]);
-		shared->tmp.merges[READ] += ACCESS_ONCE(p->merges[READ]);
-		shared->tmp.merges[WRITE] += ACCESS_ONCE(p->merges[WRITE]);
-		shared->tmp.ticks[READ] += ACCESS_ONCE(p->ticks[READ]);
-		shared->tmp.ticks[WRITE] += ACCESS_ONCE(p->ticks[WRITE]);
-		shared->tmp.io_ticks[READ] += ACCESS_ONCE(p->io_ticks[READ]);
-		shared->tmp.io_ticks[WRITE] += ACCESS_ONCE(p->io_ticks[WRITE]);
-		shared->tmp.io_ticks_total += ACCESS_ONCE(p->io_ticks_total);
-		shared->tmp.time_in_queue += ACCESS_ONCE(p->time_in_queue);
+		shared->tmp.sectors[READ] += READ_ONCE(p->sectors[READ]);
+		shared->tmp.sectors[WRITE] += READ_ONCE(p->sectors[WRITE]);
+		shared->tmp.ios[READ] += READ_ONCE(p->ios[READ]);
+		shared->tmp.ios[WRITE] += READ_ONCE(p->ios[WRITE]);
+		shared->tmp.merges[READ] += READ_ONCE(p->merges[READ]);
+		shared->tmp.merges[WRITE] += READ_ONCE(p->merges[WRITE]);
+		shared->tmp.ticks[READ] += READ_ONCE(p->ticks[READ]);
+		shared->tmp.ticks[WRITE] += READ_ONCE(p->ticks[WRITE]);
+		shared->tmp.io_ticks[READ] += READ_ONCE(p->io_ticks[READ]);
+		shared->tmp.io_ticks[WRITE] += READ_ONCE(p->io_ticks[WRITE]);
+		shared->tmp.io_ticks_total += READ_ONCE(p->io_ticks_total);
+		shared->tmp.time_in_queue += READ_ONCE(p->time_in_queue);
 		if (s->n_histogram_entries) {
 			unsigned i;
 			for (i = 0; i < s->n_histogram_entries + 1; i++)
-				shared->tmp.histogram[i] += ACCESS_ONCE(p->histogram[i]);
+				shared->tmp.histogram[i] += READ_ONCE(p->histogram[i]);
 		}
 	}
 }

drivers/md/dm-switch.c

@@ -144,7 +144,7 @@ static unsigned switch_region_table_read(struct switch_ctx *sctx, unsigned long
 
 	switch_get_position(sctx, region_nr, &region_index, &bit);
 
-	return (ACCESS_ONCE(sctx->region_table[region_index]) >> bit) &
+	return (READ_ONCE(sctx->region_table[region_index]) >> bit) &
 		((1 << sctx->region_table_entry_bits) - 1);
 }
 

drivers/md/dm-thin.c

@@ -2431,7 +2431,7 @@ static void set_pool_mode(struct pool *pool, enum pool_mode new_mode)
 	struct pool_c *pt = pool->ti->private;
 	bool needs_check = dm_pool_metadata_needs_check(pool->pmd);
 	enum pool_mode old_mode = get_pool_mode(pool);
-	unsigned long no_space_timeout = ACCESS_ONCE(no_space_timeout_secs) * HZ;
+	unsigned long no_space_timeout = READ_ONCE(no_space_timeout_secs) * HZ;
 
 	/*
 	 * Never allow the pool to transition to PM_WRITE mode if user

drivers/md/dm-verity-target.c

@@ -589,7 +589,7 @@ static void verity_prefetch_io(struct work_struct *work)
 		verity_hash_at_level(v, pw->block, i, &hash_block_start, NULL);
 		verity_hash_at_level(v, pw->block + pw->n_blocks - 1, i, &hash_block_end, NULL);
 		if (!i) {
-			unsigned cluster = ACCESS_ONCE(dm_verity_prefetch_cluster);
+			unsigned cluster = READ_ONCE(dm_verity_prefetch_cluster);
 
 			cluster >>= v->data_dev_block_bits;
 			if (unlikely(!cluster))

drivers/md/dm.c

@@ -114,7 +114,7 @@ static unsigned reserved_bio_based_ios = RESERVED_BIO_BASED_IOS;
 
 static int __dm_get_module_param_int(int *module_param, int min, int max)
 {
-	int param = ACCESS_ONCE(*module_param);
+	int param = READ_ONCE(*module_param);
 	int modified_param = 0;
 	bool modified = true;
 
@@ -136,7 +136,7 @@ static int __dm_get_module_param_int(int *module_param, int min, int max)
 unsigned __dm_get_module_param(unsigned *module_param,
 			       unsigned def, unsigned max)
 {
-	unsigned param = ACCESS_ONCE(*module_param);
+	unsigned param = READ_ONCE(*module_param);
 	unsigned modified_param = 0;
 
 	if (!param)

drivers/md/md.c

@@ -2651,7 +2651,7 @@ state_show(struct md_rdev *rdev, char *page)
 {
 	char *sep = ",";
 	size_t len = 0;
-	unsigned long flags = ACCESS_ONCE(rdev->flags);
+	unsigned long flags = READ_ONCE(rdev->flags);
 
 	if (test_bit(Faulty, &flags) ||
 	    (!test_bit(ExternalBbl, &flags) &&

drivers/md/raid5.c

@@ -6072,7 +6072,7 @@ static inline sector_t raid5_sync_request(struct mddev *mddev, sector_t sector_n
 	 */
 	rcu_read_lock();
 	for (i = 0; i < conf->raid_disks; i++) {
-		struct md_rdev *rdev = ACCESS_ONCE(conf->disks[i].rdev);
+		struct md_rdev *rdev = READ_ONCE(conf->disks[i].rdev);
 
 		if (rdev == NULL || test_bit(Faulty, &rdev->flags))
 			still_degraded = 1;

drivers/misc/mic/scif/scif_rb.c

@@ -138,7 +138,7 @@ void scif_rb_commit(struct scif_rb *rb)
 	 * the read barrier in scif_rb_count(..)
 	 */
 	wmb();
-	ACCESS_ONCE(*rb->write_ptr) = rb->current_write_offset;
+	WRITE_ONCE(*rb->write_ptr, rb->current_write_offset);
 #ifdef CONFIG_INTEL_MIC_CARD
 	/*
 	 * X100 Si bug: For the case where a Core is performing an EXT_WR
@@ -147,7 +147,7 @@ void scif_rb_commit(struct scif_rb *rb)
 	 * This way, if ordering is violated for the Interrupt Message, it will
 	 * fall just behind the first Posted associated with the first EXT_WR.
 	 */
-	ACCESS_ONCE(*rb->write_ptr) = rb->current_write_offset;
+	WRITE_ONCE(*rb->write_ptr, rb->current_write_offset);
 #endif
 }
 
@@ -210,7 +210,7 @@ void scif_rb_update_read_ptr(struct scif_rb *rb)
 	 * scif_rb_space(..)
 	 */
 	mb();
-	ACCESS_ONCE(*rb->read_ptr) = new_offset;
+	WRITE_ONCE(*rb->read_ptr, new_offset);
 #ifdef CONFIG_INTEL_MIC_CARD
 	/*
 	 * X100 Si Bug: For the case where a Core is performing an EXT_WR
@@ -219,7 +219,7 @@ void scif_rb_update_read_ptr(struct scif_rb *rb)
 	 * This way, if ordering is violated for the Interrupt Message, it will
 	 * fall just behind the first Posted associated with the first EXT_WR.
 	 */
-	ACCESS_ONCE(*rb->read_ptr) = new_offset;
+	WRITE_ONCE(*rb->read_ptr, new_offset);
 #endif
 }
 

drivers/misc/mic/scif/scif_rma_list.c

@@ -277,7 +277,7 @@ retry:
 		 * Need to restart list traversal if there has been
 		 * an asynchronous list entry deletion.
 		 */
-		if (ACCESS_ONCE(ep->rma_info.async_list_del))
+		if (READ_ONCE(ep->rma_info.async_list_del))
 			goto retry;
 	}
 	mutex_unlock(&ep->rma_info.rma_lock);

drivers/net/bonding/bond_alb.c

@@ -1378,7 +1378,7 @@ int bond_tlb_xmit(struct sk_buff *skb, struct net_device *bond_dev)
 				unsigned int count;
 
 				slaves = rcu_dereference(bond->slave_arr);
-				count = slaves ? ACCESS_ONCE(slaves->count) : 0;
+				count = slaves ? READ_ONCE(slaves->count) : 0;
 				if (likely(count))
 					tx_slave = slaves->arr[hash_index %
 							       count];

drivers/net/bonding/bond_main.c

@@ -1167,7 +1167,7 @@ static rx_handler_result_t bond_handle_frame(struct sk_buff **pskb)
 	slave = bond_slave_get_rcu(skb->dev);
 	bond = slave->bond;
 
-	recv_probe = ACCESS_ONCE(bond->recv_probe);
+	recv_probe = READ_ONCE(bond->recv_probe);
 	if (recv_probe) {
 		ret = recv_probe(skb, bond, slave);
 		if (ret == RX_HANDLER_CONSUMED) {
@@ -3810,7 +3810,7 @@ static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev
 		else
 			bond_xmit_slave_id(bond, skb, 0);
 	} else {
-		int slave_cnt = ACCESS_ONCE(bond->slave_cnt);
+		int slave_cnt = READ_ONCE(bond->slave_cnt);
 
 		if (likely(slave_cnt)) {
 			slave_id = bond_rr_gen_slave_id(bond);
@@ -3972,7 +3972,7 @@ static int bond_3ad_xor_xmit(struct sk_buff *skb, struct net_device *dev)
 	unsigned int count;
 
 	slaves = rcu_dereference(bond->slave_arr);
-	count = slaves ? ACCESS_ONCE(slaves->count) : 0;
+	count = slaves ? READ_ONCE(slaves->count) : 0;
 	if (likely(count)) {
 		slave = slaves->arr[bond_xmit_hash(bond, skb) % count];
 		bond_dev_queue_xmit(bond, skb, slave->dev);

drivers/net/ethernet/chelsio/cxgb4/sge.c

@@ -405,7 +405,7 @@ void free_tx_desc(struct adapter *adap, struct sge_txq *q,
  */
 static inline int reclaimable(const struct sge_txq *q)
 {
-	int hw_cidx = ntohs(ACCESS_ONCE(q->stat->cidx));
+	int hw_cidx = ntohs(READ_ONCE(q->stat->cidx));
 	hw_cidx -= q->cidx;
 	return hw_cidx < 0 ? hw_cidx + q->size : hw_cidx;
 }
@@ -1375,7 +1375,7 @@ out_free:	dev_kfree_skb_any(skb);
  */
 static inline void reclaim_completed_tx_imm(struct sge_txq *q)
 {
-	int hw_cidx = ntohs(ACCESS_ONCE(q->stat->cidx));
+	int hw_cidx = ntohs(READ_ONCE(q->stat->cidx));
 	int reclaim = hw_cidx - q->cidx;
 
 	if (reclaim < 0)

drivers/net/ethernet/emulex/benet/be_main.c

@@ -605,7 +605,7 @@ static void accumulate_16bit_val(u32 *acc, u16 val)
 
 	if (wrapped)
 		newacc += 65536;
-	ACCESS_ONCE(*acc) = newacc;
+	WRITE_ONCE(*acc, newacc);
 }
 
 static void populate_erx_stats(struct be_adapter *adapter,

drivers/net/ethernet/hisilicon/hip04_eth.c

@@ -373,7 +373,7 @@ static int hip04_tx_reclaim(struct net_device *ndev, bool force)
 	unsigned int count;
 
 	smp_rmb();
-	count = tx_count(ACCESS_ONCE(priv->tx_head), tx_tail);
+	count = tx_count(READ_ONCE(priv->tx_head), tx_tail);
 	if (count == 0)
 		goto out;
 
@@ -431,7 +431,7 @@ static int hip04_mac_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 	dma_addr_t phys;
 
 	smp_rmb();
-	count = tx_count(tx_head, ACCESS_ONCE(priv->tx_tail));
+	count = tx_count(tx_head, READ_ONCE(priv->tx_tail));
 	if (count == (TX_DESC_NUM - 1)) {
 		netif_stop_queue(ndev);
 		return NETDEV_TX_BUSY;

drivers/net/ethernet/intel/i40e/i40e_debugfs.c

@@ -264,7 +264,7 @@ static void i40e_dbg_dump_vsi_seid(struct i40e_pf *pf, int seid)
 		 vsi->rx_buf_failed, vsi->rx_page_failed);
 	rcu_read_lock();
 	for (i = 0; i < vsi->num_queue_pairs; i++) {
-		struct i40e_ring *rx_ring = ACCESS_ONCE(vsi->rx_rings[i]);
+		struct i40e_ring *rx_ring = READ_ONCE(vsi->rx_rings[i]);
 
 		if (!rx_ring)
 			continue;
@@ -320,7 +320,7 @@ static void i40e_dbg_dump_vsi_seid(struct i40e_pf *pf, int seid)
 			 ITR_IS_DYNAMIC(rx_ring->rx_itr_setting) ? "dynamic" : "fixed");
 	}
 	for (i = 0; i < vsi->num_queue_pairs; i++) {
-		struct i40e_ring *tx_ring = ACCESS_ONCE(vsi->tx_rings[i]);
+		struct i40e_ring *tx_ring = READ_ONCE(vsi->tx_rings[i]);
 
 		if (!tx_ring)
 			continue;

drivers/net/ethernet/intel/i40e/i40e_ethtool.c

@@ -1570,7 +1570,7 @@ static void i40e_get_ethtool_stats(struct net_device *netdev,
 	}
 	rcu_read_lock();
 	for (j = 0; j < vsi->num_queue_pairs; j++) {
-		tx_ring = ACCESS_ONCE(vsi->tx_rings[j]);
+		tx_ring = READ_ONCE(vsi->tx_rings[j]);
 
 		if (!tx_ring)
 			continue;

drivers/net/ethernet/intel/i40e/i40e_main.c

@@ -455,7 +455,7 @@ static void i40e_get_netdev_stats_struct(struct net_device *netdev,
 		u64 bytes, packets;
 		unsigned int start;
 
-		tx_ring = ACCESS_ONCE(vsi->tx_rings[i]);
+		tx_ring = READ_ONCE(vsi->tx_rings[i]);
 		if (!tx_ring)
 			continue;
 		i40e_get_netdev_stats_struct_tx(tx_ring, stats);
@@ -791,7 +791,7 @@ static void i40e_update_vsi_stats(struct i40e_vsi *vsi)
 	rcu_read_lock();
 	for (q = 0; q < vsi->num_queue_pairs; q++) {
 		/* locate Tx ring */
-		p = ACCESS_ONCE(vsi->tx_rings[q]);
+		p = READ_ONCE(vsi->tx_rings[q]);
 
 		do {
 			start = u64_stats_fetch_begin_irq(&p->syncp);

drivers/net/ethernet/intel/i40e/i40e_ptp.c

@@ -130,7 +130,7 @@ static int i40e_ptp_adjfreq(struct ptp_clock_info *ptp, s32 ppb)
 	}
 
 	smp_mb(); /* Force any pending update before accessing. */
-	adj = ACCESS_ONCE(pf->ptp_base_adj);
+	adj = READ_ONCE(pf->ptp_base_adj);
 
 	freq = adj;
 	freq *= ppb;
@@ -499,7 +499,7 @@ void i40e_ptp_set_increment(struct i40e_pf *pf)
 	wr32(hw, I40E_PRTTSYN_INC_H, incval >> 32);
 
 	/* Update the base adjustement value. */
-	ACCESS_ONCE(pf->ptp_base_adj) = incval;
+	WRITE_ONCE(pf->ptp_base_adj, incval);
 	smp_mb(); /* Force the above update. */
 }
 

drivers/net/ethernet/intel/igb/e1000_regs.h

@@ -375,7 +375,7 @@ u32 igb_rd32(struct e1000_hw *hw, u32 reg);
 /* write operations, indexed using DWORDS */
 #define wr32(reg, val) \
 do { \
-	u8 __iomem *hw_addr = ACCESS_ONCE((hw)->hw_addr); \
+	u8 __iomem *hw_addr = READ_ONCE((hw)->hw_addr); \
 	if (!E1000_REMOVED(hw_addr)) \
 		writel((val), &hw_addr[(reg)]); \
 } while (0)

drivers/net/ethernet/intel/igb/igb_main.c

@@ -750,7 +750,7 @@ static void igb_cache_ring_register(struct igb_adapter *adapter)
 u32 igb_rd32(struct e1000_hw *hw, u32 reg)
 {
 	struct igb_adapter *igb = container_of(hw, struct igb_adapter, hw);
-	u8 __iomem *hw_addr = ACCESS_ONCE(hw->hw_addr);
+	u8 __iomem *hw_addr = READ_ONCE(hw->hw_addr);
 	u32 value = 0;
 
 	if (E1000_REMOVED(hw_addr))

drivers/net/ethernet/intel/ixgbe/ixgbe_common.h

@@ -161,7 +161,7 @@ static inline bool ixgbe_removed(void __iomem *addr)
 
 static inline void ixgbe_write_reg(struct ixgbe_hw *hw, u32 reg, u32 value)
 {
-	u8 __iomem *reg_addr = ACCESS_ONCE(hw->hw_addr);
+	u8 __iomem *reg_addr = READ_ONCE(hw->hw_addr);
 
 	if (ixgbe_removed(reg_addr))
 		return;
@@ -180,7 +180,7 @@ static inline void writeq(u64 val, void __iomem *addr)
 
 static inline void ixgbe_write_reg64(struct ixgbe_hw *hw, u32 reg, u64 value)
 {
-	u8 __iomem *reg_addr = ACCESS_ONCE(hw->hw_addr);
+	u8 __iomem *reg_addr = READ_ONCE(hw->hw_addr);
 
 	if (ixgbe_removed(reg_addr))
 		return;

drivers/net/ethernet/intel/ixgbe/ixgbe_main.c

@@ -380,7 +380,7 @@ static void ixgbe_check_remove(struct ixgbe_hw *hw, u32 reg)
  */
 u32 ixgbe_read_reg(struct ixgbe_hw *hw, u32 reg)
 {
-	u8 __iomem *reg_addr = ACCESS_ONCE(hw->hw_addr);
+	u8 __iomem *reg_addr = READ_ONCE(hw->hw_addr);
 	u32 value;
 
 	if (ixgbe_removed(reg_addr))
@@ -8630,7 +8630,7 @@ static void ixgbe_get_stats64(struct net_device *netdev,
 
 	rcu_read_lock();
 	for (i = 0; i < adapter->num_rx_queues; i++) {
-		struct ixgbe_ring *ring = ACCESS_ONCE(adapter->rx_ring[i]);
+		struct ixgbe_ring *ring = READ_ONCE(adapter->rx_ring[i]);
 		u64 bytes, packets;
 		unsigned int start;
 
@@ -8646,12 +8646,12 @@ static void ixgbe_get_stats64(struct net_device *netdev,
 	}
 
 	for (i = 0; i < adapter->num_tx_queues; i++) {
-		struct ixgbe_ring *ring = ACCESS_ONCE(adapter->tx_ring[i]);
+		struct ixgbe_ring *ring = READ_ONCE(adapter->tx_ring[i]);
 
 		ixgbe_get_ring_stats64(stats, ring);
 	}
 	for (i = 0; i < adapter->num_xdp_queues; i++) {
-		struct ixgbe_ring *ring = ACCESS_ONCE(adapter->xdp_ring[i]);
+		struct ixgbe_ring *ring = READ_ONCE(adapter->xdp_ring[i]);
 
 		ixgbe_get_ring_stats64(stats, ring);
 	}

drivers/net/ethernet/intel/ixgbe/ixgbe_ptp.c

@@ -378,7 +378,7 @@ static int ixgbe_ptp_adjfreq_82599(struct ptp_clock_info *ptp, s32 ppb)
 	}
 
 	smp_mb();
-	incval = ACCESS_ONCE(adapter->base_incval);
+	incval = READ_ONCE(adapter->base_incval);
 
 	freq = incval;
 	freq *= ppb;
@@ -1159,7 +1159,7 @@ void ixgbe_ptp_start_cyclecounter(struct ixgbe_adapter *adapter)
 	}
 
 	/* update the base incval used to calculate frequency adjustment */
-	ACCESS_ONCE(adapter->base_incval) = incval;
+	WRITE_ONCE(adapter->base_incval, incval);
 	smp_mb();
 
 	/* need lock to prevent incorrect read while modifying cyclecounter */

drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c

@@ -164,7 +164,7 @@ static void ixgbevf_check_remove(struct ixgbe_hw *hw, u32 reg)
 
 u32 ixgbevf_read_reg(struct ixgbe_hw *hw, u32 reg)
 {
-	u8 __iomem *reg_addr = ACCESS_ONCE(hw->hw_addr);
+	u8 __iomem *reg_addr = READ_ONCE(hw->hw_addr);
 	u32 value;
 
 	if (IXGBE_REMOVED(reg_addr))

drivers/net/ethernet/intel/ixgbevf/vf.h

@@ -182,7 +182,7 @@ struct ixgbevf_info {
 
 static inline void ixgbe_write_reg(struct ixgbe_hw *hw, u32 reg, u32 value)
 {
-	u8 __iomem *reg_addr = ACCESS_ONCE(hw->hw_addr);
+	u8 __iomem *reg_addr = READ_ONCE(hw->hw_addr);
 
 	if (IXGBE_REMOVED(reg_addr))
 		return;

drivers/net/ethernet/mellanox/mlx4/en_tx.c

@@ -414,8 +414,8 @@ bool mlx4_en_process_tx_cq(struct net_device *dev,
 
 	index = cons_index & size_mask;
 	cqe = mlx4_en_get_cqe(buf, index, priv->cqe_size) + factor;
-	last_nr_txbb = ACCESS_ONCE(ring->last_nr_txbb);
-	ring_cons = ACCESS_ONCE(ring->cons);
+	last_nr_txbb = READ_ONCE(ring->last_nr_txbb);
+	ring_cons = READ_ONCE(ring->cons);
 	ring_index = ring_cons & size_mask;
 	stamp_index = ring_index;
 
@@ -479,8 +479,8 @@ bool mlx4_en_process_tx_cq(struct net_device *dev,
 	wmb();
 
 	/* we want to dirty this cache line once */
-	ACCESS_ONCE(ring->last_nr_txbb) = last_nr_txbb;
-	ACCESS_ONCE(ring->cons) = ring_cons + txbbs_skipped;
+	WRITE_ONCE(ring->last_nr_txbb, last_nr_txbb);
+	WRITE_ONCE(ring->cons, ring_cons + txbbs_skipped);
 
 	if (cq->type == TX_XDP)
 		return done < budget;
@@ -858,7 +858,7 @@ netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev)
 		goto tx_drop;
 
 	/* fetch ring->cons far ahead before needing it to avoid stall */
-	ring_cons = ACCESS_ONCE(ring->cons);
+	ring_cons = READ_ONCE(ring->cons);
 
 	real_size = get_real_size(skb, shinfo, dev, &lso_header_size,
 				  &inline_ok, &fragptr);
@@ -1066,7 +1066,7 @@ netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev)
 		 */
 		smp_rmb();
 
-		ring_cons = ACCESS_ONCE(ring->cons);
+		ring_cons = READ_ONCE(ring->cons);
 		if (unlikely(!mlx4_en_is_tx_ring_full(ring))) {
 			netif_tx_wake_queue(ring->tx_queue);
 			ring->wake_queue++;

drivers/net/ethernet/neterion/vxge/vxge-main.c

@@ -2629,7 +2629,7 @@ static void vxge_poll_vp_lockup(unsigned long data)
 		ring = &vdev->vpaths[i].ring;
 
 		/* Truncated to machine word size number of frames */
-		rx_frms = ACCESS_ONCE(ring->stats.rx_frms);
+		rx_frms = READ_ONCE(ring->stats.rx_frms);
 
 		/* Did this vpath received any packets */
 		if (ring->stats.prev_rx_frms == rx_frms) {

drivers/net/ethernet/sfc/ef10.c

@@ -2073,7 +2073,7 @@ static irqreturn_t efx_ef10_msi_interrupt(int irq, void *dev_id)
 	netif_vdbg(efx, intr, efx->net_dev,
 		   "IRQ %d on CPU %d\n", irq, raw_smp_processor_id());
 
-	if (likely(ACCESS_ONCE(efx->irq_soft_enabled))) {
+	if (likely(READ_ONCE(efx->irq_soft_enabled))) {
 		/* Note test interrupts */
 		if (context->index == efx->irq_level)
 			efx->last_irq_cpu = raw_smp_processor_id();
@@ -2088,7 +2088,7 @@ static irqreturn_t efx_ef10_msi_interrupt(int irq, void *dev_id)
 static irqreturn_t efx_ef10_legacy_interrupt(int irq, void *dev_id)
 {
 	struct efx_nic *efx = dev_id;
-	bool soft_enabled = ACCESS_ONCE(efx->irq_soft_enabled);
+	bool soft_enabled = READ_ONCE(efx->irq_soft_enabled);
 	struct efx_channel *channel;
 	efx_dword_t reg;
 	u32 queues;
@@ -3291,7 +3291,7 @@ static int efx_ef10_handle_rx_event(struct efx_channel *channel,
 	bool rx_cont;
 	u16 flags = 0;
 
-	if (unlikely(ACCESS_ONCE(efx->reset_pending)))
+	if (unlikely(READ_ONCE(efx->reset_pending)))
 		return 0;
 
 	/* Basic packet information */
@@ -3428,7 +3428,7 @@ efx_ef10_handle_tx_event(struct efx_channel *channel, efx_qword_t *event)
 	unsigned int tx_ev_q_label;
 	int tx_descs = 0;
 
-	if (unlikely(ACCESS_ONCE(efx->reset_pending)))
+	if (unlikely(READ_ONCE(efx->reset_pending)))
 		return 0;
 
 	if (unlikely(EFX_QWORD_FIELD(*event, ESF_DZ_TX_DROP_EVENT)))
@@ -5316,7 +5316,7 @@ static void efx_ef10_filter_remove_old(struct efx_nic *efx)
 	int i;
 
 	for (i = 0; i < HUNT_FILTER_TBL_ROWS; i++) {
-		if (ACCESS_ONCE(table->entry[i].spec) &
+		if (READ_ONCE(table->entry[i].spec) &
 		    EFX_EF10_FILTER_FLAG_AUTO_OLD) {
 			rc = efx_ef10_filter_remove_internal(efx,
 					1U << EFX_FILTER_PRI_AUTO, i, true);

drivers/net/ethernet/sfc/efx.c

@@ -2809,7 +2809,7 @@ static void efx_reset_work(struct work_struct *data)
 	unsigned long pending;
 	enum reset_type method;
 
-	pending = ACCESS_ONCE(efx->reset_pending);
+	pending = READ_ONCE(efx->reset_pending);
 	method = fls(pending) - 1;
 
 	if (method == RESET_TYPE_MC_BIST)
@@ -2874,7 +2874,7 @@ void efx_schedule_reset(struct efx_nic *efx, enum reset_type type)
 	/* If we're not READY then just leave the flags set as the cue
 	 * to abort probing or reschedule the reset later.
 	 */
-	if (ACCESS_ONCE(efx->state) != STATE_READY)
+	if (READ_ONCE(efx->state) != STATE_READY)
 		return;
 
 	/* efx_process_channel() will no longer read events once a

drivers/net/ethernet/sfc/falcon/efx.c

@@ -2545,7 +2545,7 @@ static void ef4_reset_work(struct work_struct *data)
 	unsigned long pending;
 	enum reset_type method;
 
-	pending = ACCESS_ONCE(efx->reset_pending);
+	pending = READ_ONCE(efx->reset_pending);
 	method = fls(pending) - 1;
 
 	if ((method == RESET_TYPE_RECOVER_OR_DISABLE ||
@@ -2605,7 +2605,7 @@ void ef4_schedule_reset(struct ef4_nic *efx, enum reset_type type)
 	/* If we're not READY then just leave the flags set as the cue
 	 * to abort probing or reschedule the reset later.
 	 */
-	if (ACCESS_ONCE(efx->state) != STATE_READY)
+	if (READ_ONCE(efx->state) != STATE_READY)
 		return;
 
 	queue_work(reset_workqueue, &efx->reset_work);

drivers/net/ethernet/sfc/falcon/falcon.c

@@ -452,7 +452,7 @@ static irqreturn_t falcon_legacy_interrupt_a1(int irq, void *dev_id)
 		   "IRQ %d on CPU %d status " EF4_OWORD_FMT "\n",
 		   irq, raw_smp_processor_id(), EF4_OWORD_VAL(*int_ker));
 
-	if (!likely(ACCESS_ONCE(efx->irq_soft_enabled)))
+	if (!likely(READ_ONCE(efx->irq_soft_enabled)))
 		return IRQ_HANDLED;
 
 	/* Check to see if we have a serious error condition */
@@ -1372,7 +1372,7 @@ static void falcon_reconfigure_mac_wrapper(struct ef4_nic *efx)
 	ef4_oword_t reg;
 	int link_speed, isolate;
 
-	isolate = !!ACCESS_ONCE(efx->reset_pending);
+	isolate = !!READ_ONCE(efx->reset_pending);
 
 	switch (link_state->speed) {
 	case 10000: link_speed = 3; break;

drivers/net/ethernet/sfc/falcon/farch.c

@@ -834,7 +834,7 @@ ef4_farch_handle_tx_event(struct ef4_channel *channel, ef4_qword_t *event)
 	struct ef4_nic *efx = channel->efx;
 	int tx_packets = 0;
 
-	if (unlikely(ACCESS_ONCE(efx->reset_pending)))
+	if (unlikely(READ_ONCE(efx->reset_pending)))
 		return 0;
 
 	if (likely(EF4_QWORD_FIELD(*event, FSF_AZ_TX_EV_COMP))) {
@@ -990,7 +990,7 @@ ef4_farch_handle_rx_event(struct ef4_channel *channel, const ef4_qword_t *event)
 	struct ef4_rx_queue *rx_queue;
 	struct ef4_nic *efx = channel->efx;
 
-	if (unlikely(ACCESS_ONCE(efx->reset_pending)))
+	if (unlikely(READ_ONCE(efx->reset_pending)))
 		return;
 
 	rx_ev_cont = EF4_QWORD_FIELD(*event, FSF_AZ_RX_EV_JUMBO_CONT);
@@ -1504,7 +1504,7 @@ irqreturn_t ef4_farch_fatal_interrupt(struct ef4_nic *efx)
 irqreturn_t ef4_farch_legacy_interrupt(int irq, void *dev_id)
 {
 	struct ef4_nic *efx = dev_id;
-	bool soft_enabled = ACCESS_ONCE(efx->irq_soft_enabled);
+	bool soft_enabled = READ_ONCE(efx->irq_soft_enabled);
 	ef4_oword_t *int_ker = efx->irq_status.addr;
 	irqreturn_t result = IRQ_NONE;
 	struct ef4_channel *channel;
@@ -1596,7 +1596,7 @@ irqreturn_t ef4_farch_msi_interrupt(int irq, void *dev_id)
 		   "IRQ %d on CPU %d status " EF4_OWORD_FMT "\n",
 		   irq, raw_smp_processor_id(), EF4_OWORD_VAL(*int_ker));
 
-	if (!likely(ACCESS_ONCE(efx->irq_soft_enabled)))
+	if (!likely(READ_ONCE(efx->irq_soft_enabled)))
 		return IRQ_HANDLED;
 
 	/* Handle non-event-queue sources */

drivers/net/ethernet/sfc/falcon/nic.h

@@ -83,7 +83,7 @@ static inline struct ef4_tx_queue *ef4_tx_queue_partner(struct ef4_tx_queue *tx_
 static inline bool __ef4_nic_tx_is_empty(struct ef4_tx_queue *tx_queue,
 					 unsigned int write_count)
 {
-	unsigned int empty_read_count = ACCESS_ONCE(tx_queue->empty_read_count);
+	unsigned int empty_read_count = READ_ONCE(tx_queue->empty_read_count);
 
 	if (empty_read_count == 0)
 		return false;
@@ -464,11 +464,11 @@ irqreturn_t ef4_farch_fatal_interrupt(struct ef4_nic *efx);
 
 static inline int ef4_nic_event_test_irq_cpu(struct ef4_channel *channel)
 {
-	return ACCESS_ONCE(channel->event_test_cpu);
+	return READ_ONCE(channel->event_test_cpu);
 }
 static inline int ef4_nic_irq_test_irq_cpu(struct ef4_nic *efx)
 {
-	return ACCESS_ONCE(efx->last_irq_cpu);
+	return READ_ONCE(efx->last_irq_cpu);
 }
 
 /* Global Resources */

drivers/net/ethernet/sfc/falcon/tx.c

@@ -134,8 +134,8 @@ static void ef4_tx_maybe_stop_queue(struct ef4_tx_queue *txq1)
 	 */
 	netif_tx_stop_queue(txq1->core_txq);
 	smp_mb();
-	txq1->old_read_count = ACCESS_ONCE(txq1->read_count);
-	txq2->old_read_count = ACCESS_ONCE(txq2->read_count);
+	txq1->old_read_count = READ_ONCE(txq1->read_count);
+	txq2->old_read_count = READ_ONCE(txq2->read_count);
 
 	fill_level = max(txq1->insert_count - txq1->old_read_count,
 			 txq2->insert_count - txq2->old_read_count);
@@ -524,7 +524,7 @@ void ef4_xmit_done(struct ef4_tx_queue *tx_queue, unsigned int index)
 
 	/* Check whether the hardware queue is now empty */
 	if ((int)(tx_queue->read_count - tx_queue->old_write_count) >= 0) {
-		tx_queue->old_write_count = ACCESS_ONCE(tx_queue->write_count);
+		tx_queue->old_write_count = READ_ONCE(tx_queue->write_count);
 		if (tx_queue->read_count == tx_queue->old_write_count) {
 			smp_mb();
 			tx_queue->empty_read_count =

drivers/net/ethernet/sfc/farch.c

@@ -827,7 +827,7 @@ efx_farch_handle_tx_event(struct efx_channel *channel, efx_qword_t *event)
 	struct efx_nic *efx = channel->efx;
 	int tx_packets = 0;
 
-	if (unlikely(ACCESS_ONCE(efx->reset_pending)))
+	if (unlikely(READ_ONCE(efx->reset_pending)))
 		return 0;
 
 	if (likely(EFX_QWORD_FIELD(*event, FSF_AZ_TX_EV_COMP))) {
@@ -979,7 +979,7 @@ efx_farch_handle_rx_event(struct efx_channel *channel, const efx_qword_t *event)
 	struct efx_rx_queue *rx_queue;
 	struct efx_nic *efx = channel->efx;
 
-	if (unlikely(ACCESS_ONCE(efx->reset_pending)))
+	if (unlikely(READ_ONCE(efx->reset_pending)))
 		return;
 
 	rx_ev_cont = EFX_QWORD_FIELD(*event, FSF_AZ_RX_EV_JUMBO_CONT);
@@ -1520,7 +1520,7 @@ irqreturn_t efx_farch_fatal_interrupt(struct efx_nic *efx)
 irqreturn_t efx_farch_legacy_interrupt(int irq, void *dev_id)
 {
 	struct efx_nic *efx = dev_id;
-	bool soft_enabled = ACCESS_ONCE(efx->irq_soft_enabled);
+	bool soft_enabled = READ_ONCE(efx->irq_soft_enabled);
 	efx_oword_t *int_ker = efx->irq_status.addr;
 	irqreturn_t result = IRQ_NONE;
 	struct efx_channel *channel;
@@ -1612,7 +1612,7 @@ irqreturn_t efx_farch_msi_interrupt(int irq, void *dev_id)
 		   "IRQ %d on CPU %d status " EFX_OWORD_FMT "\n",
 		   irq, raw_smp_processor_id(), EFX_OWORD_VAL(*int_ker));
 
-	if (!likely(ACCESS_ONCE(efx->irq_soft_enabled)))
+	if (!likely(READ_ONCE(efx->irq_soft_enabled)))
 		return IRQ_HANDLED;
 
 	/* Handle non-event-queue sources */

drivers/net/ethernet/sfc/nic.h

@@ -81,7 +81,7 @@ static struct efx_tx_queue *efx_tx_queue_partner(struct efx_tx_queue *tx_queue)
 static inline bool __efx_nic_tx_is_empty(struct efx_tx_queue *tx_queue,
 					 unsigned int write_count)
 {
-	unsigned int empty_read_count = ACCESS_ONCE(tx_queue->empty_read_count);
+	unsigned int empty_read_count = READ_ONCE(tx_queue->empty_read_count);
 
 	if (empty_read_count == 0)
 		return false;
@@ -617,11 +617,11 @@ irqreturn_t efx_farch_fatal_interrupt(struct efx_nic *efx);
 
 static inline int efx_nic_event_test_irq_cpu(struct efx_channel *channel)
 {
-	return ACCESS_ONCE(channel->event_test_cpu);
+	return READ_ONCE(channel->event_test_cpu);
 }
 static inline int efx_nic_irq_test_irq_cpu(struct efx_nic *efx)
 {
-	return ACCESS_ONCE(efx->last_irq_cpu);
+	return READ_ONCE(efx->last_irq_cpu);
 }
 
 /* Global Resources */

drivers/net/ethernet/sfc/ptp.c

@@ -658,7 +658,7 @@ static void efx_ptp_send_times(struct efx_nic *efx,
 
 	/* Write host time for specified period or until MC is done */
 	while ((timespec64_compare(&now.ts_real, &limit) < 0) &&
-	       ACCESS_ONCE(*mc_running)) {
+	       READ_ONCE(*mc_running)) {
 		struct timespec64 update_time;
 		unsigned int host_time;
 
@@ -668,7 +668,7 @@ static void efx_ptp_send_times(struct efx_nic *efx,
 		do {
 			pps_get_ts(&now);
 		} while ((timespec64_compare(&now.ts_real, &update_time) < 0) &&
-			 ACCESS_ONCE(*mc_running));
+			 READ_ONCE(*mc_running));
 
 		/* Synchronise NIC with single word of time only */
 		host_time = (now.ts_real.tv_sec << MC_NANOSECOND_BITS |
@@ -832,14 +832,14 @@ static int efx_ptp_synchronize(struct efx_nic *efx, unsigned int num_readings)
 		       ptp->start.dma_addr);
 
 	/* Clear flag that signals MC ready */
-	ACCESS_ONCE(*start) = 0;
+	WRITE_ONCE(*start, 0);
 	rc = efx_mcdi_rpc_start(efx, MC_CMD_PTP, synch_buf,
 				MC_CMD_PTP_IN_SYNCHRONIZE_LEN);
 	EFX_WARN_ON_ONCE_PARANOID(rc);
 
 	/* Wait for start from MCDI (or timeout) */
 	timeout = jiffies + msecs_to_jiffies(MAX_SYNCHRONISE_WAIT_MS);
-	while (!ACCESS_ONCE(*start) && (time_before(jiffies, timeout))) {
+	while (!READ_ONCE(*start) && (time_before(jiffies, timeout))) {
 		udelay(20);	/* Usually start MCDI execution quickly */
 		loops++;
 	}
@@ -849,7 +849,7 @@ static int efx_ptp_synchronize(struct efx_nic *efx, unsigned int num_readings)
 	if (!time_before(jiffies, timeout))
 		++ptp->sync_timeouts;
 
-	if (ACCESS_ONCE(*start))
+	if (READ_ONCE(*start))
 		efx_ptp_send_times(efx, &last_time);
 
 	/* Collect results */

drivers/net/ethernet/sfc/tx.c

@@ -136,8 +136,8 @@ static void efx_tx_maybe_stop_queue(struct efx_tx_queue *txq1)
 	 */
 	netif_tx_stop_queue(txq1->core_txq);
 	smp_mb();
-	txq1->old_read_count = ACCESS_ONCE(txq1->read_count);
-	txq2->old_read_count = ACCESS_ONCE(txq2->read_count);
+	txq1->old_read_count = READ_ONCE(txq1->read_count);
+	txq2->old_read_count = READ_ONCE(txq2->read_count);
 
 	fill_level = max(txq1->insert_count - txq1->old_read_count,
 			 txq2->insert_count - txq2->old_read_count);
@@ -752,7 +752,7 @@ void efx_xmit_done(struct efx_tx_queue *tx_queue, unsigned int index)
 
 	/* Check whether the hardware queue is now empty */
 	if ((int)(tx_queue->read_count - tx_queue->old_write_count) >= 0) {
-		tx_queue->old_write_count = ACCESS_ONCE(tx_queue->write_count);
+		tx_queue->old_write_count = READ_ONCE(tx_queue->write_count);
 		if (tx_queue->read_count == tx_queue->old_write_count) {
 			smp_mb();
 			tx_queue->empty_read_count =

drivers/net/ethernet/sun/niu.c

@@ -6245,7 +6245,7 @@ static void niu_get_rx_stats(struct niu *np,
 
 	pkts = dropped = errors = bytes = 0;
 
-	rx_rings = ACCESS_ONCE(np->rx_rings);
+	rx_rings = READ_ONCE(np->rx_rings);
 	if (!rx_rings)
 		goto no_rings;
 
@@ -6276,7 +6276,7 @@ static void niu_get_tx_stats(struct niu *np,
 
 	pkts = errors = bytes = 0;
 
-	tx_rings = ACCESS_ONCE(np->tx_rings);
+	tx_rings = READ_ONCE(np->tx_rings);
 	if (!tx_rings)
 		goto no_rings;
 

drivers/net/tap.c

@@ -257,7 +257,7 @@ static struct tap_queue *tap_get_queue(struct tap_dev *tap,
 	 * and validate that the result isn't NULL - in case we are
 	 * racing against queue removal.
 	 */
-	int numvtaps = ACCESS_ONCE(tap->numvtaps);
+	int numvtaps = READ_ONCE(tap->numvtaps);
 	__u32 rxq;
 
 	if (!numvtaps)

drivers/net/tun.c

@@ -469,7 +469,7 @@ static u16 tun_select_queue(struct net_device *dev, struct sk_buff *skb,
 	u32 numqueues = 0;
 
 	rcu_read_lock();
-	numqueues = ACCESS_ONCE(tun->numqueues);
+	numqueues = READ_ONCE(tun->numqueues);
 
 	txq = __skb_get_hash_symmetric(skb);
 	if (txq) {
@@ -864,7 +864,7 @@ static netdev_tx_t tun_net_xmit(struct sk_buff *skb, struct net_device *dev)
 
 	rcu_read_lock();
 	tfile = rcu_dereference(tun->tfiles[txq]);
-	numqueues = ACCESS_ONCE(tun->numqueues);
+	numqueues = READ_ONCE(tun->numqueues);
 
 	/* Drop packet if interface is not attached */
 	if (txq >= numqueues)

drivers/net/wireless/ath/ath5k/desc.c

@@ -500,13 +500,13 @@ ath5k_hw_proc_4word_tx_status(struct ath5k_hw *ah,
 
 	tx_status = &desc->ud.ds_tx5212.tx_stat;
 
-	txstat1 = ACCESS_ONCE(tx_status->tx_status_1);
+	txstat1 = READ_ONCE(tx_status->tx_status_1);
 
 	/* No frame has been send or error */
 	if (unlikely(!(txstat1 & AR5K_DESC_TX_STATUS1_DONE)))
 		return -EINPROGRESS;
 
-	txstat0 = ACCESS_ONCE(tx_status->tx_status_0);
+	txstat0 = READ_ONCE(tx_status->tx_status_0);
 
 	/*
 	 * Get descriptor status
@@ -700,14 +700,14 @@ ath5k_hw_proc_5212_rx_status(struct ath5k_hw *ah,
 	u32 rxstat0, rxstat1;
 
 	rx_status = &desc->ud.ds_rx.rx_stat;
-	rxstat1 = ACCESS_ONCE(rx_status->rx_status_1);
+	rxstat1 = READ_ONCE(rx_status->rx_status_1);
 
 	/* No frame received / not ready */
 	if (unlikely(!(rxstat1 & AR5K_5212_RX_DESC_STATUS1_DONE)))
 		return -EINPROGRESS;
 
 	memset(rs, 0, sizeof(struct ath5k_rx_status));
-	rxstat0 = ACCESS_ONCE(rx_status->rx_status_0);
+	rxstat0 = READ_ONCE(rx_status->rx_status_0);
 
 	/*
 	 * Frame receive status

drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c

@@ -3628,7 +3628,7 @@ static void brcmf_sdio_dataworker(struct work_struct *work)
 
 	bus->dpc_running = true;
 	wmb();
-	while (ACCESS_ONCE(bus->dpc_triggered)) {
+	while (READ_ONCE(bus->dpc_triggered)) {
 		bus->dpc_triggered = false;
 		brcmf_sdio_dpc(bus);
 		bus->idlecount = 0;

drivers/net/wireless/intel/iwlwifi/mvm/ops.c

@@ -1118,7 +1118,7 @@ void iwl_mvm_set_hw_ctkill_state(struct iwl_mvm *mvm, bool state)
 static bool iwl_mvm_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
 {
 	struct iwl_mvm *mvm = IWL_OP_MODE_GET_MVM(op_mode);
-	bool calibrating = ACCESS_ONCE(mvm->calibrating);
+	bool calibrating = READ_ONCE(mvm->calibrating);
 
 	if (state)
 		set_bit(IWL_MVM_STATUS_HW_RFKILL, &mvm->status);

drivers/net/wireless/intel/iwlwifi/mvm/tx.c

@@ -652,7 +652,7 @@ int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
 				return -1;
 		} else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
 			   is_multicast_ether_addr(hdr->addr1)) {
-			u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id);
+			u8 ap_sta_id = READ_ONCE(mvmvif->ap_sta_id);
 
 			if (ap_sta_id != IWL_MVM_INVALID_STA)
 				sta_id = ap_sta_id;
@@ -700,7 +700,7 @@ static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
 	snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
 		tcp_hdrlen(skb);
 
-	dbg_max_amsdu_len = ACCESS_ONCE(mvm->max_amsdu_len);
+	dbg_max_amsdu_len = READ_ONCE(mvm->max_amsdu_len);
 
 	if (!sta->max_amsdu_len ||
 	    !ieee80211_is_data_qos(hdr->frame_control) ||

drivers/net/wireless/intel/iwlwifi/pcie/rx.c

@@ -1247,7 +1247,7 @@ restart:
 	spin_lock(&rxq->lock);
 	/* uCode's read index (stored in shared DRAM) indicates the last Rx
 	 * buffer that the driver may process (last buffer filled by ucode). */
-	r = le16_to_cpu(ACCESS_ONCE(rxq->rb_stts->closed_rb_num)) & 0x0FFF;
+	r = le16_to_cpu(READ_ONCE(rxq->rb_stts->closed_rb_num)) & 0x0FFF;
 	i = rxq->read;
 
 	/* W/A 9000 device step A0 wrap-around bug */