linux-kernel - Re: [PATCH v3 4/6] sched/completion: Add wait_for_completion

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Message-ID: <YxhjNSnFHcexbM+0@hirez.programming.kicks-ass.net>
Date:   Wed, 7 Sep 2022 11:24:05 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     rjw@...ysocki.net, oleg@...hat.com, vincent.guittot@...aro.org,
        dietmar.eggemann@....com, rostedt@...dmis.org, mgorman@...e.de,
        ebiederm@...ssion.com, bigeasy@...utronix.de,
        Will Deacon <will@...nel.org>, linux-kernel@...r.kernel.org,
        tj@...nel.org, linux-pm@...r.kernel.org
Subject: Re: [PATCH v3 4/6] sched/completion: Add wait_for_completion_state()

On Wed, Sep 07, 2022 at 09:35:20AM +0200, Ingo Molnar wrote:
> That's not actually true: there's ~7 functions in kernel/sched/completion.c 
> with local variables, and only ~2 have this minor stylistic inconsistency 
> right now AFAICS. Scheduler-wide the ratio is even lower.
> 
> So even if a patch doesn't entirely remove the residual noise, let's not 
> add to it, please?


--- a/kernel/sched/completion.c
+++ b/kernel/sched/completion.c
@@ -204,6 +204,7 @@ EXPORT_SYMBOL(wait_for_completion_io_tim
 int __sched wait_for_completion_interruptible(struct completion *x)
 {
 	long t = wait_for_common(x, MAX_SCHEDULE_TIMEOUT, TASK_INTERRUPTIBLE);
+
 	if (t == -ERESTARTSYS)
 		return t;
 	return 0;
@@ -241,6 +242,7 @@ EXPORT_SYMBOL(wait_for_completion_interr
 int __sched wait_for_completion_killable(struct completion *x)
 {
 	long t = wait_for_common(x, MAX_SCHEDULE_TIMEOUT, TASK_KILLABLE);
+
 	if (t == -ERESTARTSYS)
 		return t;
 	return 0;
@@ -250,6 +252,7 @@ EXPORT_SYMBOL(wait_for_completion_killab
 int __sched wait_for_completion_state(struct completion *x, unsigned int state)
 {
 	long t = wait_for_common(x, MAX_SCHEDULE_TIMEOUT, state);
+
 	if (t == -ERESTARTSYS)
 		return t;
 	return 0;