linux-kernel - [tip: sched/core] sched/core: Update stale comment in try_to_wake

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Message-ID: <169669866063.3135.14858424410402561741.tip-bot2@tip-bot2>
Date:   Sat, 07 Oct 2023 17:11:00 -0000
From:   "tip-bot2 for Ingo Molnar" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Zhang Qiao <zhangqiao22@...wei.com>,
        Ingo Molnar <mingo@...nel.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: sched/core] sched/core: Update stale comment in try_to_wake_up()

The following commit has been merged into the sched/core branch of tip:

Commit-ID:     ea41bb514fe286bf50498b3c6d7f7a5dc2b6c5e0
Gitweb:        https://git.kernel.org/tip/ea41bb514fe286bf50498b3c6d7f7a5dc2b6c5e0
Author:        Ingo Molnar <mingo@...nel.org>
AuthorDate:    Wed, 04 Oct 2023 11:33:36 +02:00
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Sat, 07 Oct 2023 11:33:28 +02:00

sched/core: Update stale comment in try_to_wake_up()

The following commit:

  9b3c4ab3045e ("sched,rcu: Rework try_invoke_on_locked_down_task()")

... renamed try_invoke_on_locked_down_task() to task_call_func(),
but forgot to update the comment in try_to_wake_up().

But it turns out that the smp_rmb() doesn't live in task_call_func()
either, it was moved to __task_needs_rq_lock() in:

  91dabf33ae5d ("sched: Fix race in task_call_func()")

Fix that now.

Also fix the s/smb/smp typo while at it.

Reported-by: Zhang Qiao <zhangqiao22@...wei.com>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Link: https://lore.kernel.org/r/20230731085759.11443-1-zhangqiao22@huawei.com
---
 kernel/sched/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 65e10ac..f5783cb 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -4237,7 +4237,7 @@ int try_to_wake_up(struct task_struct *p, unsigned int state, int wake_flags)
 		 * Pairs with the LOCK+smp_mb__after_spinlock() on rq->lock in
 		 * __schedule().  See the comment for smp_mb__after_spinlock().
 		 *
-		 * A similar smb_rmb() lives in try_invoke_on_locked_down_task().
+		 * A similar smp_rmb() lives in __task_needs_rq_lock().
 		 */
 		smp_rmb();
 		if (READ_ONCE(p->on_rq) && ttwu_runnable(p, wake_flags))