linux-kernel - Re: [PATCH 1/2] mm: slab: fix comment for ARCH_KMALLOC

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Date:   Fri, 29 Apr 2022 11:41:11 +0200
From:   Vlastimil Babka <vbabka@...e.cz>
To:     andrey.konovalov@...ux.dev,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     Andrey Konovalov <andreyknvl@...il.com>,
        Christoph Lameter <cl@...ux.com>,
        Pekka Enberg <penberg@...nel.org>,
        David Rientjes <rientjes@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Roman Gushchin <roman.gushchin@...ux.dev>,
        Peter Collingbourne <pcc@...gle.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org,
        Andrey Konovalov <andreyknvl@...gle.com>
Subject: Re: [PATCH 1/2] mm: slab: fix comment for ARCH_KMALLOC_MINALIGN

On 4/28/22 17:59, andrey.konovalov@...ux.dev wrote:
> From: Andrey Konovalov <andreyknvl@...gle.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@...gle.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