ext4: zero out inline data using memset() instead of empty_zero_page

Not all architectures (in particular, sparc64) have empty_zero_page.
So instead of copying from empty_zero_page, use memset to clear the
inline data by signalling to ext4_xattr_set_entry() via a magic
pointer value, EXT4_ZERO_ATTR_VALUE, which is defined by casting -1 to
a pointer.

This fixes a build failure on sparc64, and the memset() should be more
efficient than using memcpy() anyway.

Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index 53b2f65091dd..387c47c6cda9 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -268,7 +268,7 @@ static int ext4_create_inline_data(handle_t *handle,
                 goto out;
 
         if (len > EXT4_MIN_INLINE_DATA_SIZE) {
-                value = (void *)empty_zero_page;
+                value = EXT4_ZERO_XATTR_VALUE;
                 len -= EXT4_MIN_INLINE_DATA_SIZE;
         } else {
                 value = "";