cpumask: deprecate cpumask_next_wrap()

The next patch aligns implementation of cpumask_next_wrap() with the
find_next_bit_wrap(), and it changes function signature.

To make the transition smooth, this patch deprecates current
implementation by adding an _old suffix. The following patches switch
current users to the new implementation one by one.

No functional changes were intended.

Signed-off-by: Yury Norov <yury.norov@gmail.com>

Author: YuryNorov

arch/s390/kernel/processor.c

@@ -72,7 +72,7 @@ void notrace stop_machine_yield(const struct cpumask *cpumask)
 	this_cpu = smp_processor_id();
 	if (__this_cpu_inc_return(cpu_relax_retry) >= spin_retry) {
 		__this_cpu_write(cpu_relax_retry, 0);
-		cpu = cpumask_next_wrap(this_cpu, cpumask, this_cpu, false);
+		cpu = cpumask_next_wrap_old(this_cpu, cpumask, this_cpu, false);
 		if (cpu >= nr_cpu_ids)
 			return;
 		if (arch_vcpu_is_preempted(cpu))

drivers/pci/controller/pci-hyperv.c

@@ -1757,7 +1757,7 @@ static int hv_compose_multi_msi_req_get_cpu(void)
 
 	spin_lock_irqsave(&multi_msi_cpu_lock, flags);
 
-	cpu_next = cpumask_next_wrap(cpu_next, cpu_online_mask, nr_cpu_ids,
+	cpu_next = cpumask_next_wrap_old(cpu_next, cpu_online_mask, nr_cpu_ids,
 				     false);
 	cpu = cpu_next;
 

drivers/scsi/lpfc/lpfc_init.c

@@ -12873,7 +12873,7 @@ lpfc_irq_rebalance(struct lpfc_hba *phba, unsigned int cpu, bool offline)
 
 	if (offline) {
 		/* Find next online CPU on original mask */
-		cpu_next = cpumask_next_wrap(cpu, orig_mask, cpu, true);
+		cpu_next = cpumask_next_wrap_old(cpu, orig_mask, cpu, true);
 		cpu_select = lpfc_next_online_cpu(orig_mask, cpu_next);
 
 		/* Found a valid CPU */

include/linux/cpumask.h

@@ -296,7 +296,7 @@ unsigned int cpumask_next_and(int n, const struct cpumask *src1p,
 
 #if NR_CPUS == 1
 static __always_inline
-unsigned int cpumask_next_wrap(int n, const struct cpumask *mask, int start, bool wrap)
+unsigned int cpumask_next_wrap_old(int n, const struct cpumask *mask, int start, bool wrap)
 {
 	cpumask_check(start);
 	if (n != -1)
@@ -312,7 +312,7 @@ unsigned int cpumask_next_wrap(int n, const struct cpumask *mask, int start, boo
 	return cpumask_first(mask);
 }
 #else
-unsigned int __pure cpumask_next_wrap(int n, const struct cpumask *mask, int start, bool wrap);
+unsigned int __pure cpumask_next_wrap_old(int n, const struct cpumask *mask, int start, bool wrap);
 #endif
 
 /**

kernel/padata.c

@@ -290,7 +290,7 @@ static struct padata_priv *padata_find_next(struct parallel_data *pd,
 	if (remove_object) {
 		list_del_init(&padata->list);
 		++pd->processed;
-		pd->cpu = cpumask_next_wrap(cpu, pd->cpumask.pcpu, -1, false);
+		pd->cpu = cpumask_next_wrap_old(cpu, pd->cpumask.pcpu, -1, false);
 	}
 
 	spin_unlock(&reorder->lock);

lib/cpumask.c

@@ -8,7 +8,7 @@
 #include <linux/numa.h>
 
 /**
- * cpumask_next_wrap - helper to implement for_each_cpu_wrap
+ * cpumask_next_wrap_old - helper to implement for_each_cpu_wrap
  * @n: the cpu prior to the place to search
  * @mask: the cpumask pointer
  * @start: the start point of the iteration
@@ -19,7 +19,7 @@
  * Note: the @wrap argument is required for the start condition when
  * we cannot assume @start is set in @mask.
  */
-unsigned int cpumask_next_wrap(int n, const struct cpumask *mask, int start, bool wrap)
+unsigned int cpumask_next_wrap_old(int n, const struct cpumask *mask, int start, bool wrap)
 {
 	unsigned int next;
 
@@ -37,7 +37,7 @@ unsigned int cpumask_next_wrap(int n, const struct cpumask *mask, int start, boo
 
 	return next;
 }
-EXPORT_SYMBOL(cpumask_next_wrap);
+EXPORT_SYMBOL(cpumask_next_wrap_old);
 
 /* These are not inline because of header tangles. */
 #ifdef CONFIG_CPUMASK_OFFSTACK