From: Dave Chinner Date: Thu, 16 Mar 2023 00:31:03 +0000 (-0700) Subject: fork: remove use of percpu_counter_sum_all X-Git-Tag: v6.6.7~3224^2~1 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=7ba85fba47bd89618fdb7dc322bdf823b1b56efb;p=platform%2Fkernel%2Flinux-starfive.git fork: remove use of percpu_counter_sum_all This effectively reverts the change made in commit f689054aace2 ("percpu_counter: add percpu_counter_sum_all interface") as the race condition percpu_counter_sum_all() was invented to avoid is now handled directly in percpu_counter_sum() and nobody needs to care about summing racing with cpu unplug anymore. Signed-off-by: Dave Chinner Reviewed-by: Darrick J. Wong Signed-off-by: Darrick J. Wong --- diff --git a/kernel/fork.c b/kernel/fork.c index f68954d..bcc3085 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -755,11 +755,6 @@ static void check_mm(struct mm_struct *mm) for (i = 0; i < NR_MM_COUNTERS; i++) { long x = percpu_counter_sum(&mm->rss_stat[i]); - if (likely(!x)) - continue; - - /* Making sure this is not due to race with CPU offlining. */ - x = percpu_counter_sum_all(&mm->rss_stat[i]); if (unlikely(x)) pr_alert("BUG: Bad rss-counter state mm:%p type:%s val:%ld\n", mm, resident_page_types[i], x);