linux-kernel - [PATCH] mm: Provide consistent declaration for num_poisoned

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Message-Id: <1519686565-8224-1-git-send-email-linux@roeck-us.net>
Date:   Mon, 26 Feb 2018 15:09:25 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Guenter Roeck <linux@...ck-us.net>,
        Matthias Kaehlcke <mka@...omium.org>
Subject: [PATCH] mm: Provide consistent declaration for num_poisoned_pages

clang reports the following compile warning.

In file included from mm/vmscan.c:56:
./include/linux/swapops.h:327:22: warning:
	section attribute is specified on redeclared variable [-Wsection]
extern atomic_long_t num_poisoned_pages __read_mostly;
                     ^
./include/linux/mm.h:2585:22: note: previous declaration is here
extern atomic_long_t num_poisoned_pages;
                     ^

Let's use __read_mostly everywhere.

Signed-off-by: Guenter Roeck <linux@...ck-us.net>
Cc: Matthias Kaehlcke <mka@...omium.org>
---
 include/linux/mm.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index ad06d42adb1a..bd4bd59f02c1 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2582,7 +2582,7 @@ extern int get_hwpoison_page(struct page *page);
 extern int sysctl_memory_failure_early_kill;
 extern int sysctl_memory_failure_recovery;
 extern void shake_page(struct page *p, int access);
-extern atomic_long_t num_poisoned_pages;
+extern atomic_long_t num_poisoned_pages __read_mostly;
 extern int soft_offline_page(struct page *page, int flags);
 
 
-- 
2.7.4