linux-kernel - [PATCH v2 3/3] mm: Don't manually decrement num_poisoned

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Message-Id: <20190626061124.16013-4-alastair@au1.ibm.com>
Date:   Wed, 26 Jun 2019 16:11:23 +1000
From:   "Alastair D'Silva" <alastair@....ibm.com>
To:     alastair@...ilva.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Pavel Tatashin <pasha.tatashin@...cle.com>,
        Oscar Salvador <osalvador@...e.de>,
        Michal Hocko <mhocko@...e.com>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Baoquan He <bhe@...hat.com>,
        Wei Yang <richard.weiyang@...il.com>,
        Logan Gunthorpe <logang@...tatee.com>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: [PATCH v2 3/3] mm: Don't manually decrement num_poisoned_pages

From: Alastair D'Silva <alastair@...ilva.org>

Use the function written to do it instead.

Signed-off-by: Alastair D'Silva <alastair@...ilva.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]);
 		}
 	}
-- 
2.21.0