[PATCH] f2fs: silence VM_WARN_ON_ONCE in mempool_alloc

[Gao Xiang]

Note that __GFP_ZERO is not supported for mempool_alloc,
which also documented in the mempool_alloc comments.

Signed-off-by: Gao Xiang <gaoxian...@huawei.com>
---
 fs/f2fs/data.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index f91d8630c9a2..83c14b31aaba 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -299,9 +299,10 @@ static inline void __submit_bio(struct f2fs_sb_info *sbi,
                for (; start < F2FS_IO_SIZE(sbi); start++) {
                        struct page *page =
                                mempool_alloc(sbi->write_io_dummy,
-                                       GFP_NOIO | __GFP_ZERO | __GFP_NOFAIL);
+                                             GFP_NOIO | __GFP_NOFAIL);
                        f2fs_bug_on(sbi, !page);
 
+                       zero_user_segment(page, 0, PAGE_SIZE);
                        SetPagePrivate(page);
                        set_page_private(page, (unsigned 
long)DUMMY_WRITTEN_PAGE);
                        lock_page(page);
-- 
2.14.4