[RFC 01/11] mm: use SWAP_SUCCESS instead of 0

[Minchan Kim]

SWAP_SUCCESS defined value 0 can be changed always so don't rely on
it. Instead, use explict macro.

Cc: Kirill A. Shutemov <kir...@shutemov.name>
Signed-off-by: Minchan Kim <minc...@kernel.org>
---
 mm/huge_memory.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 092cc5c..fe2ccd4 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -2114,7 +2114,7 @@ static void freeze_page(struct page *page)
                ttu_flags |= TTU_MIGRATION;
 
        ret = try_to_unmap(page, ttu_flags);
-       VM_BUG_ON_PAGE(ret, page);
+       VM_BUG_ON_PAGE(ret != SWAP_SUCCESS, page);
 }
 
 static void unfreeze_page(struct page *page)
-- 
2.7.4