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Subject: Re: [PATCH v2 3/3] mm: Don't manually decrement num_poisoned_pages
To:     Alastair D'Silva <alastair@au1.ibm.com>, alastair@d-silva.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "Rafael J. Wysocki" <rafael@kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Pavel Tatashin <pasha.tatashin@oracle.com>,
        Oscar Salvador <osalvador@suse.de>,
        Michal Hocko <mhocko@suse.com>,
        Mike Rapoport <rppt@linux.ibm.com>,
        Baoquan He <bhe@redhat.com>,
        Wei Yang <richard.weiyang@gmail.com>,
        Logan Gunthorpe <logang@deltatee.com>,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org
References: <20190626061124.16013-1-alastair@au1.ibm.com>
 <20190626061124.16013-4-alastair@au1.ibm.com>
From:   David Hildenbrand <david@redhat.com>
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Organization: Red Hat GmbH
Message-ID: <7b087c07-9bf3-6668-b55c-06b11a08f0c6@redhat.com>
Date:   Fri, 28 Jun 2019 13:29:50 +0200
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On 26.06.19 08:11, Alastair D'Silva wrote:
> From: Alastair D'Silva <alastair@d-silva.org>
> 
> Use the function written to do it instead.
> 
> Signed-off-by: Alastair D'Silva <alastair@d-silva.org>
> ---
>  mm/sparse.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/mm/sparse.c b/mm/sparse.c
> index 1ec32aef5590..d9b3625bfdf0 100644
> --- a/mm/sparse.c
> +++ b/mm/sparse.c
> @@ -11,6 +11,8 @@
>  #include <linux/export.h>
>  #include <linux/spinlock.h>
>  #include <linux/vmalloc.h>
> +#include <linux/swap.h>
> +#include <linux/swapops.h>
>  
>  #include "internal.h"
>  #include <asm/dma.h>
> @@ -772,7 +774,7 @@ static void clear_hwpoisoned_pages(struct page *memmap,
>  
>  	for (i = start; i < start + count; i++) {
>  		if (PageHWPoison(&memmap[i])) {
> -			atomic_long_sub(1, &num_poisoned_pages);
> +			num_poisoned_pages_dec();
>  			ClearPageHWPoison(&memmap[i]);
>  		}
>  	}
> 

Reviewed-by: David Hildenbrand <david@redhat.com>

-- 

Thanks,

David / dhildenb