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objpool: rework objpool_pop()

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The function has to track number of iterations to prevent an infinite
loop. for_each_cpu_wrap() macro takes care of it, which simplifies user
code.

Signed-off-by: Yury Norov <yury.norov@gmail.com>
This commit is contained in:
Yury Norov
2025-02-18 11:51:22 -05:00
parent 9ffa4b35a6
commit d81603b32c
1 changed files with 3 additions and 4 deletions
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include/linux/objpool.h
+3 -4
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@@ -170,17 +170,16 @@ static inline void *objpool_pop(struct objpool_head *pool)
{
void *obj = NULL;
unsigned long flags;
int i, cpu;
int start, cpu;
/* disable local irq to avoid preemption & interruption */
raw_local_irq_save(flags);
cpu = raw_smp_processor_id();
for (i = 0; i < pool->nr_possible_cpus; i++) {
start = raw_smp_processor_id();
for_each_possible_cpu_wrap(cpu, start) {
obj = __objpool_try_get_slot(pool, cpu);
if (obj)
break;
cpu = cpumask_next_wrap(cpu, cpu_possible_mask, -1, 1);
}
raw_local_irq_restore(flags);