[PATCH] mm: swap: make pointer swap_avail_heads static

[Colin King <colin.king@canonical.com>]

From: Colin Ian King <colin.king@canonical.com>

The pointer swap_avail_heads is local to the source and does not need
to be in global scope, so make it static.

Cleans up sparse warning:
mm/swapfile.c:88:19: warning: symbol 'swap_avail_heads' was not
declared. Should it be static?

Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
 mm/swapfile.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/swapfile.c b/mm/swapfile.c
index 006047b16814..0d00471af98b 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -85,7 +85,7 @@ PLIST_HEAD(swap_active_head);
  * is held and the locking order requires swap_lock to be taken
  * before any swap_info_struct->lock.
  */
-struct plist_head *swap_avail_heads;
+static struct plist_head *swap_avail_heads;
 static DEFINE_SPINLOCK(swap_avail_lock);
 
 struct swap_info_struct *swap_info[MAX_SWAPFILES];
-- 
2.15.1

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