* [PATCH] fs/super.c: use && instead of & for warn_on condition
@ 2015-09-21 15:18 Vincent Stehlé
2015-09-21 15:40 ` Oleg Nesterov
0 siblings, 1 reply; 3+ messages in thread
From: Vincent Stehlé @ 2015-09-21 15:18 UTC (permalink / raw)
To: linux-fsdevel
Cc: linux-kernel, Vincent Stehlé, Oleg Nesterov, Alexander Viro,
trivial
This fixes the following sparse warning:
fs/super.c:1202:9: warning: dubious: x & !y
Bitwise and logical and are equivalent here, but logical was intended.
The generated code is identical, with and without CONFIG_LOCKDEP.
Signed-off-by: Vincent Stehlé <vincent.stehle@freescale.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: trivial@kernel.org
---
fs/super.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/super.c b/fs/super.c
index 954aeb8..7ea56de 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -1199,7 +1199,7 @@ int __sb_start_write(struct super_block *sb, int level, bool wait)
else
ret = percpu_down_read_trylock(sb->s_writers.rw_sem + level-1);
- WARN_ON(force_trylock & !ret);
+ WARN_ON(force_trylock && !ret);
return ret;
}
EXPORT_SYMBOL(__sb_start_write);
--
2.5.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] fs/super.c: use && instead of & for warn_on condition
2015-09-21 15:18 [PATCH] fs/super.c: use && instead of & for warn_on condition Vincent Stehlé
@ 2015-09-21 15:40 ` Oleg Nesterov
2015-12-08 13:51 ` Jiri Kosina
0 siblings, 1 reply; 3+ messages in thread
From: Oleg Nesterov @ 2015-09-21 15:40 UTC (permalink / raw)
To: Vincent Stehlé; +Cc: linux-fsdevel, linux-kernel, Alexander Viro, trivial
On 09/21, Vincent Stehl� wrote:
>
> --- a/fs/super.c
> +++ b/fs/super.c
> @@ -1199,7 +1199,7 @@ int __sb_start_write(struct super_block *sb, int level, bool wait)
> else
> ret = percpu_down_read_trylock(sb->s_writers.rw_sem + level-1);
>
> - WARN_ON(force_trylock & !ret);
> + WARN_ON(force_trylock && !ret);
OOPS! yes, this is a typo, thanks! Harmless in this particular case,
but still.
Acked-by: Oleg Nesterov <oleg@redhat.com>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] fs/super.c: use && instead of & for warn_on condition
2015-09-21 15:40 ` Oleg Nesterov
@ 2015-12-08 13:51 ` Jiri Kosina
0 siblings, 0 replies; 3+ messages in thread
From: Jiri Kosina @ 2015-12-08 13:51 UTC (permalink / raw)
To: Oleg Nesterov
Cc: Vincent Stehlé, linux-fsdevel, linux-kernel, Alexander Viro
On Mon, 21 Sep 2015, Oleg Nesterov wrote:
> > --- a/fs/super.c
> > +++ b/fs/super.c
> > @@ -1199,7 +1199,7 @@ int __sb_start_write(struct super_block *sb, int level, bool wait)
> > else
> > ret = percpu_down_read_trylock(sb->s_writers.rw_sem + level-1);
> >
> > - WARN_ON(force_trylock & !ret);
> > + WARN_ON(force_trylock && !ret);
>
> OOPS! yes, this is a typo, thanks! Harmless in this particular case,
> but still.
>
> Acked-by: Oleg Nesterov <oleg@redhat.com>
Doesn't seem to be in linux-next as of today, so I am taking it now.
Thanks,
--
Jiri Kosina
SUSE Labs
^ permalink raw reply [flat|nested] 3+ messages in thread
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2015-09-21 15:40 ` Oleg Nesterov
2015-12-08 13:51 ` Jiri Kosina
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