From: Vlastimil Babka <vbabka@suse.cz>
To: Bart Van Assche <bvanassche@acm.org>,
Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org,
Mel Gorman <mgorman@techsingularity.net>,
Christoph Lameter <cl@linux.com>, Roman Gushchin <guro@fb.com>
Subject: Re: [PATCH] slab.h: Avoid using & for logical and of booleans
Date: Tue, 6 Nov 2018 09:40:09 +0100 [thread overview]
Message-ID: <b9738f05-2d9d-1489-8398-790e815294cc@suse.cz> (raw)
In-Reply-To: <20181105204000.129023-1-bvanassche@acm.org>
On 11/5/18 9:40 PM, Bart Van Assche wrote:
> This patch suppresses the following sparse warning:
>
> ./include/linux/slab.h:332:43: warning: dubious: x & !y
>
> Fixes: 1291523f2c1d ("mm, slab/slub: introduce kmalloc-reclaimable caches")
> Cc: Vlastimil Babka <vbabka@suse.cz>
> Cc: Mel Gorman <mgorman@techsingularity.net>
> Cc: Christoph Lameter <cl@linux.com>
> Cc: Roman Gushchin <guro@fb.com>
> Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Thanks.
Acked-by: Vlastimil Babka <vbabka@suse.cz>
> ---
> include/linux/slab.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/include/linux/slab.h b/include/linux/slab.h
> index 918f374e7156..97d0599ddb7b 100644
> --- a/include/linux/slab.h
> +++ b/include/linux/slab.h
> @@ -329,7 +329,7 @@ static __always_inline enum kmalloc_cache_type kmalloc_type(gfp_t flags)
> * If an allocation is both __GFP_DMA and __GFP_RECLAIMABLE, return
> * KMALLOC_DMA and effectively ignore __GFP_RECLAIMABLE
> */
> - return type_dma + (is_reclaimable & !is_dma) * KMALLOC_RECLAIM;
> + return type_dma + is_reclaimable * !is_dma * KMALLOC_RECLAIM;
> }
>
> /*
>
next prev parent reply other threads:[~2018-11-06 8:40 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-05 20:40 [PATCH] slab.h: Avoid using & for logical and of booleans Bart Van Assche
2018-11-05 21:13 ` Andrew Morton
2018-11-05 21:48 ` Bart Van Assche
2018-11-05 22:14 ` Rasmus Villemoes
2018-11-05 22:40 ` Bart Van Assche
2018-11-05 22:48 ` Alexander Duyck
2018-11-06 0:01 ` Bart Van Assche
2018-11-06 0:11 ` Alexander Duyck
2018-11-06 0:32 ` Bart Van Assche
2018-11-06 17:20 ` Alexander Duyck
2018-11-06 17:48 ` Bart Van Assche
2018-11-06 18:17 ` Alexander Duyck
2018-11-06 9:45 ` William Kucharski
2018-11-06 8:40 ` Vlastimil Babka [this message]
2018-11-06 10:08 ` David Laight
2018-11-06 10:22 ` Vlastimil Babka
2018-11-06 11:07 ` David Laight
2018-11-06 12:51 ` Vlastimil Babka
2018-11-07 10:41 ` David Laight
2018-11-09 8:12 ` Vlastimil Babka
2018-11-09 19:00 ` Andrew Morton
2018-11-09 19:16 ` Vlastimil Babka
2018-11-09 19:47 ` Darryl T. Agostinelli
2018-11-09 21:31 ` Vlastimil Babka
2018-11-12 9:55 ` David Laight
2018-11-13 18:22 ` Vlastimil Babka
2018-11-21 13:22 ` Vlastimil Babka
2018-11-19 11:04 ` Pavel Machek
2018-11-19 12:51 ` Vlastimil Babka
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