mm: remove SWAP_[SUCCESS|AGAIN|FAIL]

There is no user for it.  Remove it.

[[email protected]: use false instead of SWAP_FAIL]
Link: http://lkml.kernel.org/r/20170316053313.GA19241@bbox
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Minchan Kim <[email protected]>
Cc: Anshuman Khandual <[email protected]>
Cc: Hillf Danton <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Kirill A. Shutemov <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Naoya Horiguchi <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: Sergey Senozhatsky <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/include/linux/rmap.h b/include/linux/rmap.h
index 13ed232cbb29e6e5d33d8e0000c911f1635ae549..43ef2c30cb0f59f83c05d23eea4a8aad87edefd1 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 47e8dafc83c87fa235d4bd631247b241075a9351..e303fdbee561567ee4fd15155eb5e504a3f6f933 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;
                        }