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bcachefs: Fix a pcpu var splat

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this_cpu_ptr() emits a warning when used without preemption disabled -
harmless in this case, as we have other locking where
bch2_acc_percpu_u64s() is used.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
This commit is contained in:
Kent Overstreet 2021-10-07 18:18:01 -04:00 committed by Kent Overstreet
parent 4b09ef12e7
commit 107fe5af56
1 changed files with 6 additions and 1 deletions
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7
fs/bcachefs/util.c
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@ -893,9 +893,14 @@ void eytzinger0_find_test(void)
*/
u64 *bch2_acc_percpu_u64s(u64 __percpu *p, unsigned nr)
{
u64 *ret = this_cpu_ptr(p);
u64 *ret;
int cpu;
/* access to pcpu vars has to be blocked by other locking */
preempt_disable();
ret = this_cpu_ptr(p);
preempt_enable();
for_each_possible_cpu(cpu) {
u64 *i = per_cpu_ptr(p, cpu);