Re: [PATCH 1/2] mm: slab: fix comment for ARCH_KMALLOC_MINALIGN

From: Vlastimil Babka <vbabka@suse.cz>
To: andrey.konovalov@linux.dev, Andrew Morton <akpm@linux-foundation.org>
Cc: Andrey Konovalov <andreyknvl@gmail.com>,
	Christoph Lameter <cl@linux.com>,
	Pekka Enberg <penberg@kernel.org>,
	David Rientjes <rientjes@google.com>,
	Joonsoo Kim <iamjoonsoo.kim@lge.com>,
	Roman Gushchin <roman.gushchin@linux.dev>,
	Peter Collingbourne <pcc@google.com>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	Andrey Konovalov <andreyknvl@google.com>
Subject: Re: [PATCH 1/2] mm: slab: fix comment for ARCH_KMALLOC_MINALIGN
Date: Fri, 29 Apr 2022 11:41:11 +0200	[thread overview]
Message-ID: <6b31f436-5bfb-9d8f-9418-55036f342f2e@suse.cz> (raw)
In-Reply-To: <fe1ca7a25a054b61d1038686d07569416e287e7b.1651161548.git.andreyknvl@google.com>

On 4/28/22 17:59, andrey.konovalov@linux.dev wrote:
> From: Andrey Konovalov <andreyknvl@google.com>
> 
> The comment next to the ARCH_KMALLOC_MINALIGN definition says that
> ARCH_KMALLOC_MINALIGN can be defined in arch headers. This is incorrect:
> it's actually ARCH_DMA_MINALIGN that can be defined there.
> 
> Fix the comment.
> 
> Signed-off-by: Andrey Konovalov <andreyknvl@google.com>

Thanks, added both patches to the slab tree.

> ---
>  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 373b3ef99f4e..8cc1d54e56ad 100644
> --- a/include/linux/slab.h
> +++ b/include/linux/slab.h
> @@ -190,7 +190,7 @@ void kmem_dump_obj(void *object);
>  /*
>   * Some archs want to perform DMA into kmalloc caches and need a guaranteed
>   * alignment larger than the alignment of a 64-bit integer.
> - * Setting ARCH_KMALLOC_MINALIGN in arch headers allows that.
> + * Setting ARCH_DMA_MINALIGN in arch headers allows that.
>   */
>  #if defined(ARCH_DMA_MINALIGN) && ARCH_DMA_MINALIGN > 8
>  #define ARCH_KMALLOC_MINALIGN ARCH_DMA_MINALIGN