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| author | Theodore Ts'o <tytso@mit.edu> | 2012-12-11 09:31:49 +0100 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2012-12-11 09:31:49 +0100 |
| commit | bd9926e80330d43f15b710c2935fa41b792d56fd (patch) | |
| tree | ccc30335831784996b7435d10df39ee14e92afad /fs/ext4/xattr.h | |
| parent | ext4: ensure Inode flags consistency are checked at build time (diff) | |
| download | linux-bd9926e80330d43f15b710c2935fa41b792d56fd.tar.xz linux-bd9926e80330d43f15b710c2935fa41b792d56fd.zip | |
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.h | 1 |
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; |