mm: remove SWAP_[SUCCESS|AGAIN|FAIL]

There is no user for it.  Remove it.

[minchan@kernel.org: use false instead of SWAP_FAIL]
Link: http://lkml.kernel.org/r/20170316053313.GA19241@bbox
Link: http://lkml.kernel.org/r/1489555493-14659-11-git-send-email-minchan@kernel.org
Signed-off-by: Minchan Kim <minchan@kernel.org>
Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/linux/rmap.h b/include/linux/rmap.h
index 13ed232..43ef2c3 100644 (file)
--- a/include/linux/rmap.h
+++ b/include/linux/rmap.h
@@ -295,11 +295,4 @@ static inline int page_mkclean(struct page *page)
 
 #endif /* CONFIG_MMU */
 
-/*
- * Return values of try_to_unmap
- */
-#define SWAP_SUCCESS   0
-#define SWAP_AGAIN     1
-#define SWAP_FAIL      2
-
 #endif /* _LINUX_RMAP_H */

diff --git a/mm/rmap.c b/mm/rmap.c
index 47e8daf..e303fdb 100644 (file)
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -1419,7 +1419,7 @@ static bool try_to_unmap_one(struct page *page, struct vm_area_struct *vma,
                         */
                        if (unlikely(PageSwapBacked(page) != PageSwapCache(page))) {
                                WARN_ON_ONCE(1);
-                               ret = SWAP_FAIL;
+                               ret = false;
                                page_vma_mapped_walk_done(&pvmw);
                                break;
                        }