From: Christopher Lameter <cl@linux.com>
To: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Pekka Enberg <penberg@kernel.org>,
David Rientjes <rientjes@google.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] slab: fix 'dubious: x & !y' warning from Sparse
Date: Fri, 16 Nov 2018 13:51:19 +0000 [thread overview]
Message-ID: <010001671cca4b8b-2333373d-6b28-44e1-bca3-24570b8e0d2b-000000@email.amazonses.com> (raw)
In-Reply-To: <1542346829-31063-1-git-send-email-yamada.masahiro@socionext.com>
On Fri, 16 Nov 2018, Masahiro Yamada wrote:
> diff --git a/include/linux/slab.h b/include/linux/slab.h
> index 918f374..d395c73 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;
> }
Ok then lets revert the initial patch whose point was to avoid a branch.
&& causes a branch again.
next prev parent reply other threads:[~2018-11-16 13:51 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-16 5:40 Masahiro Yamada
2018-11-16 8:39 ` Michal Hocko
2018-11-16 13:51 ` Christopher Lameter [this message]
2018-11-16 17:04 ` Michal Hocko
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