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authorTheodore Ts'o <tytso@mit.edu>2012-12-11 12:31:49 +0400
committerTheodore Ts'o <tytso@mit.edu>2012-12-11 12:31:49 +0400
commitbd9926e80330d43f15b710c2935fa41b792d56fd (patch)
treeccc30335831784996b7435d10df39ee14e92afad /fs/ext4/xattr.h
parent9a4c8019471386c6fb039ae9e30f5216b6b55a9e (diff)
downloadlinux-bd9926e80330d43f15b710c2935fa41b792d56fd.tar.xz
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>
Diffstat (limited to 'fs/ext4/xattr.h')
-rw-r--r--fs/ext4/xattr.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h
index 7b5513ed3b38..69eda787a96a 100644
--- a/fs/ext4/xattr.h
+++ b/fs/ext4/xattr.h
@@ -71,6 +71,7 @@ struct ext4_xattr_entry {
#define BFIRST(bh) ENTRY(BHDR(bh)+1)
#define IS_LAST_ENTRY(entry) (*(__u32 *)(entry) == 0)
+#define EXT4_ZERO_XATTR_VALUE ((void *)-1)
struct ext4_xattr_info {
int name_index;