x86, ioapic: Use irq_cfg() instead of irq_get_chip_data() for better readability

Use defined helper function irq_cfg() instead of irq_get_chip_data() for
better readability.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1402302011-23642-15-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/x86/kernel/apic/io_apic.c

@@ -230,7 +230,7 @@ int __init arch_early_irq_init(void)
 	return 0;
 }
 
-static struct irq_cfg *irq_cfg(unsigned int irq)
+static inline struct irq_cfg *irq_cfg(unsigned int irq)
 {
 	return irq_get_chip_data(irq);
 }
@@ -272,7 +272,7 @@ static struct irq_cfg *alloc_irq_and_cfg_at(unsigned int at, int node)
 	if (res < 0) {
 		if (res != -EEXIST)
 			return NULL;
-		cfg = irq_get_chip_data(at);
+		cfg = irq_cfg(at);
 		if (cfg)
 			return cfg;
 	}
@@ -1204,7 +1204,7 @@ void __setup_vector_irq(int cpu)
 	raw_spin_lock(&vector_lock);
 	/* Mark the inuse vectors */
 	for_each_active_irq(irq) {
-		cfg = irq_get_chip_data(irq);
+		cfg = irq_cfg(irq);
 		if (!cfg)
 			continue;
 
@@ -1612,7 +1612,7 @@ __apicdebuginit(void) print_IO_APICs(void)
 		if (chip != &ioapic_chip)
 			continue;
 
-		cfg = irq_get_chip_data(irq);
+		cfg = irq_cfg(irq);
 		if (!cfg)
 			continue;
 		entry = cfg->irq_2_pin;
@@ -2253,7 +2253,7 @@ static void irq_complete_move(struct irq_cfg *cfg)
 
 void irq_force_complete_move(int irq)
 {
-	struct irq_cfg *cfg = irq_get_chip_data(irq);
+	struct irq_cfg *cfg = irq_cfg(irq);
 
 	if (!cfg)
 		return;
@@ -2515,7 +2515,7 @@ static inline void init_IO_APIC_traps(void)
 	unsigned int irq;
 
 	for_each_active_irq(irq) {
-		cfg = irq_get_chip_data(irq);
+		cfg = irq_cfg(irq);
 		if (IO_APIC_IRQ(irq) && cfg && !cfg->vector) {
 			/*
 			 * Hmm.. We don't have an entry for this,
@@ -2648,7 +2648,7 @@ early_param("disable_timer_pin_1", disable_timer_pin_setup);
  */
 static inline void __init check_timer(void)
 {
-	struct irq_cfg *cfg = irq_get_chip_data(0);
+	struct irq_cfg *cfg = irq_cfg(0);
 	int node = cpu_to_node(0);
 	int apic1, pin1, apic2, pin2;
 	unsigned long flags;
@@ -2912,7 +2912,7 @@ int arch_setup_hwirq(unsigned int irq, int node)
 
 void arch_teardown_hwirq(unsigned int irq)
 {
-	struct irq_cfg *cfg = irq_get_chip_data(irq);
+	struct irq_cfg *cfg = irq_cfg(irq);
 	unsigned long flags;
 
 	free_remapped_irq(irq);
@@ -3039,7 +3039,7 @@ int setup_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc,
 	if (!irq_offset)
 		write_msi_msg(irq, &msg);
 
-	setup_remapped_irq(irq, irq_get_chip_data(irq), chip);
+	setup_remapped_irq(irq, irq_cfg(irq), chip);
 
 	irq_set_chip_and_handler_name(irq, chip, handle_edge_irq, "edge");
 
@@ -3178,7 +3178,7 @@ int default_setup_hpet_msi(unsigned int irq, unsigned int id)
 
 	hpet_msi_write(irq_get_handler_data(irq), &msg);
 	irq_set_status_flags(irq, IRQ_MOVE_PCNTXT);
-	setup_remapped_irq(irq, irq_get_chip_data(irq), chip);
+	setup_remapped_irq(irq, irq_cfg(irq), chip);
 
 	irq_set_chip_and_handler_name(irq, chip, handle_edge_irq, "edge");
 	return 0;