x86/intel_rdt: Switch to bitmap_zalloc()

Switch to bitmap_zalloc() to show clearly what is allocated. Besides that
it returns a pointer of bitmap type instead of opaque void *.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Fenghua Yu <fenghua.yu@intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Link: https://lkml.kernel.org/r/20180830115039.63430-1-andriy.shevchenko@linux.intel.com

arch/x86/kernel/cpu/intel_rdt.c

@@ -485,9 +485,7 @@ static int domain_setup_mon_state(struct rdt_resource *r, struct rdt_domain *d)
 	size_t tsize;
 
 	if (is_llc_occupancy_enabled()) {
-		d->rmid_busy_llc = kcalloc(BITS_TO_LONGS(r->num_rmid),
-					   sizeof(unsigned long),
-					   GFP_KERNEL);
+		d->rmid_busy_llc = bitmap_zalloc(r->num_rmid, GFP_KERNEL);
 		if (!d->rmid_busy_llc)
 			return -ENOMEM;
 		INIT_DELAYED_WORK(&d->cqm_limbo, cqm_handle_limbo);
@@ -496,7 +494,7 @@ static int domain_setup_mon_state(struct rdt_resource *r, struct rdt_domain *d)
 		tsize = sizeof(*d->mbm_total);
 		d->mbm_total = kcalloc(r->num_rmid, tsize, GFP_KERNEL);
 		if (!d->mbm_total) {
-			kfree(d->rmid_busy_llc);
+			bitmap_free(d->rmid_busy_llc);
 			return -ENOMEM;
 		}
 	}
@@ -504,7 +502,7 @@ static int domain_setup_mon_state(struct rdt_resource *r, struct rdt_domain *d)
 		tsize = sizeof(*d->mbm_local);
 		d->mbm_local = kcalloc(r->num_rmid, tsize, GFP_KERNEL);
 		if (!d->mbm_local) {
-			kfree(d->rmid_busy_llc);
+			bitmap_free(d->rmid_busy_llc);
 			kfree(d->mbm_total);
 			return -ENOMEM;
 		}
@@ -612,7 +610,7 @@ static void domain_remove_cpu(int cpu, struct rdt_resource *r)
 
 		kfree(d->ctrl_val);
 		kfree(d->mbps_val);
-		kfree(d->rmid_busy_llc);
+		bitmap_free(d->rmid_busy_llc);
 		kfree(d->mbm_total);
 		kfree(d->mbm_local);
 		kfree(d);