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Date:   Tue, 27 Aug 2019 08:25:32 +0200
From:   Michal Hocko <mhocko@kernel.org>
To:     Alastair D'Silva <alastair@au1.ibm.com>
Cc:     alastair@d-silva.org, Andrew Morton <akpm@linux-foundation.org>,
        Oscar Salvador <osalvador@suse.de>,
        Dan Williams <dan.j.williams@intel.com>,
        Mike Rapoport <rppt@linux.ibm.com>,
        David Hildenbrand <david@redhat.com>,
        Wei Yang <richardw.yang@linux.intel.com>,
        Qian Cai <cai@lca.pw>, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] mm: Don't manually decrement num_poisoned_pages
Message-ID: <20190827062532.GP7538@dhcp22.suse.cz>
References: <20190827053656.32191-1-alastair@au1.ibm.com>
 <20190827053656.32191-2-alastair@au1.ibm.com>
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On Tue 27-08-19 15:36:54, 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>

Acked-by: Michal Hocko <mhocko@suse.com>

> ---
>  mm/sparse.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/mm/sparse.c b/mm/sparse.c
> index 72f010d9bff5..e41917a7e844 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>
> @@ -898,7 +900,7 @@ static void clear_hwpoisoned_pages(struct page *memmap, int nr_pages)
>  
>  	for (i = 0; i < nr_pages; i++) {
>  		if (PageHWPoison(&memmap[i])) {
> -			atomic_long_sub(1, &num_poisoned_pages);
> +			num_poisoned_pages_dec();
>  			ClearPageHWPoison(&memmap[i]);
>  		}
>  	}
> -- 
> 2.21.0

-- 
Michal Hocko
SUSE Labs