[patch 038/140] mm/swapfile.c: make pointer swap_avail_heads static

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From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
Subject: mm/swapfile.c: make pointer swap_avail_heads static

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?

Link: http://lkml.kernel.org/r/20180206215836.12366-1-colin.king@xxxxxxxxxxxxx
Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Acked-by: "Huang, Ying" <ying.huang@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 mm/swapfile.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -puN mm/swapfile.c~mm-swap-make-pointer-swap_avail_heads-static mm/swapfile.c
--- a/mm/swapfile.c~mm-swap-make-pointer-swap_avail_heads-static
+++ a/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];
_
--
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