dax: set did_zero to true when zeroing successfully

It is unnecessary to check and set did_zero value in while() loop
in dax_zero_iter(), we can set did_zero to true only when zeroing
successfully at last.

Signed-off-by: Kaixu Xia <kaixuxia@tencent.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>

diff --git a/fs/dax.c b/fs/dax.c
index 4155a6107fa10d20914446e5798110fcddddc08f..649ff51c9a267f9bb1cb786b494ef333b729b548 100644 (file)
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -1088,10 +1088,10 @@ static s64 dax_zero_iter(struct iomap_iter *iter, bool *did_zero)
                pos += size;
                length -= size;
                written += size;
-               if (did_zero)
-                       *did_zero = true;
        } while (length > 0);
 
+       if (did_zero)
+               *did_zero = true;
        return written;
 }