From 7d36a4a7c558a5750fe9b080b636d0d340bf142a Mon Sep 17 00:00:00 2001
From: Andrew Morton <akpm@linux-foundation.org>
Date: Thu, 7 Feb 2013 12:26:16 +1100
Subject: [PATCH] mm-make-madvisemadv_willneed-support-swap-file-prefetch-fix

fix CONFIG_SWAP=n build

Cc: Shaohua Li <shli@fusionio.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
 mm/madvise.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mm/madvise.c b/mm/madvise.c
index 51d57c12dd78..e5602536508f 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -134,6 +134,7 @@ out:
 	return error;
 }
 
+#ifdef CONFIG_SWAP
 static int swapin_walk_pmd_entry(pmd_t *pmd, unsigned long start,
 	unsigned long end, struct mm_walk *walk)
 {
@@ -209,6 +210,7 @@ static void force_shm_swapin_readahead(struct vm_area_struct *vma,
 
 	lru_add_drain();	/* Push any new pages onto the LRU now */
 }
+#endif		/* CONFIG_SWAP */
 
 /*
  * Schedule all required I/O operations.  Do not wait for completion.
-- 
2.39.5