mm: remove CONFIG_UNEVICTABLE_LRU config option

Currently, nobody wants to turn UNEVICTABLE_LRU off.  Thus this
configurability is unnecessary.

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Andi Kleen <andi@firstfloor.org>
Acked-by: Minchan Kim <minchan.kim@gmail.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Matt Mackall <mpm@selenic.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Lee Schermerhorn <lee.schermerhorn@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 7 deletions

diff --git a/include/linux/rmap.h b/include/linux/rmap.h
index b35bc0e19cd9..619379a1dd98 100644
--- a/include/linux/rmap.h
+++ b/include/linux/rmap.h
@@ -105,18 +105,11 @@ unsigned long page_address_in_vma(struct page *, struct vm_area_struct *);
  */
 int page_mkclean(struct page *);
 
-#ifdef CONFIG_UNEVICTABLE_LRU
 /*
  * called in munlock()/munmap() path to check for other vmas holding
  * the page mlocked.
  */
 int try_to_munlock(struct page *);
-#else
-static inline int try_to_munlock(struct page *page)
-{
-        return 0;       /* a.k.a. SWAP_SUCCESS */
-}
-#endif
 
 #else   /* !CONFIG_MMU */