From: Peter Zijlstra <peterz@infradead.org>
To: Jules Irenge <jbi.octave@gmail.com>
Cc: linux-kernel@vger.kernel.org, julia.lawall@lip6.fr,
boqun.feng@gmail.com, Ingo Molnar <mingo@redhat.com>,
Will Deacon <will@kernel.org>
Subject: Re: [PATCH v2 4/4] locking/rtmutex: Remove Comparison to bool
Date: Mon, 30 Mar 2020 13:21:57 +0200 [thread overview]
Message-ID: <20200330112157.GI20696@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20200330012450.312155-5-jbi.octave@gmail.com>
On Mon, Mar 30, 2020 at 02:24:50AM +0100, Jules Irenge wrote:
> Coccinelle reports a warning inside __sched rt_mutex_slowunlock()
>
> WARNING: Comparison to bool
I don't mind the patch; but WTH is that a WARNING ?!? Superfluous, but
definitely not wrong or even dangerous AFAICT.
> To fix this,
> a comparison (==) of a bool type function result to value true
> together with the value are removed.
>
> Signed-off-by: Jules Irenge <jbi.octave@gmail.com>
> ---
> kernel/locking/rtmutex.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c
> index 851bbb10819d..7289e7b26be4 100644
> --- a/kernel/locking/rtmutex.c
> +++ b/kernel/locking/rtmutex.c
> @@ -1378,7 +1378,7 @@ static bool __sched rt_mutex_slowunlock(struct rt_mutex *lock,
> */
> while (!rt_mutex_has_waiters(lock)) {
> /* Drops lock->wait_lock ! */
> - if (unlock_rt_mutex_safe(lock, flags) == true)
> + if (unlock_rt_mutex_safe(lock, flags))
> return false;
> /* Relock the rtmutex and try again */
> raw_spin_lock_irqsave(&lock->wait_lock, flags);
> --
> 2.25.1
>
next prev parent reply other threads:[~2020-03-30 11:22 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <0/4>
2020-03-30 1:24 ` [PATCH v2 0/4] Coccinelle cleanups Jules Irenge
2020-03-30 1:24 ` [PATCH v2 1/4] cpu: Remove Comparison to bool Jules Irenge
2020-03-30 1:24 ` [PATCH v2 2/4] rcu: Replace 1 by true Jules Irenge
2020-03-30 21:16 ` Paul E. McKenney
2020-03-30 1:24 ` [PATCH v2 3/4] genirq: " Jules Irenge
2020-03-30 1:24 ` [PATCH v2 4/4] locking/rtmutex: Remove Comparison to bool Jules Irenge
2020-03-30 11:21 ` Peter Zijlstra [this message]
2020-04-03 16:17 ` Jules Irenge
2020-08-01 18:45 ` [PATCH 0/4] Checkpatch tool errors clean up Jules Irenge
2020-08-01 18:46 ` [PATCH 1/4] acct: Add required space between variable and operator Jules Irenge
2020-08-01 18:46 ` [PATCH 2/4] audit: uninitialize global variable audit_sig_sid Jules Irenge
2020-08-01 18:55 ` Joe Perches
2020-08-01 20:26 ` Paul Moore
2020-08-02 14:32 ` Jules Irenge
2020-08-01 18:46 ` [PATCH 3/4] audit: uninitialize static variables Jules Irenge
2020-08-01 20:21 ` Paul Moore
2020-08-01 18:46 ` [PATCH 4/4] context_tracking: " Jules Irenge
2020-08-03 9:37 ` peterz
2020-08-03 10:27 ` Jules Irenge
2020-08-01 19:07 ` [PATCH 0/4] Checkpatch tool errors clean up Joe Perches
2020-08-02 14:54 ` Jules Irenge
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