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| author | Theodore Ts'o <tytso@mit.edu> | 2011-01-10 20:13:26 +0300 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2011-01-10 20:13:26 +0300 |
| commit | b05e6ae58a13b56e3e11882c1fc71948c9b29760 (patch) | |
| tree | 452cbadcbc8091b4db95f917f28b0f9de845dabf /fs/ext4/ext4_extents.h | |
| parent | 01f49d0b9d0209dc1194255b11601e4b94447b36 (diff) | |
| download | linux-b05e6ae58a13b56e3e11882c1fc71948c9b29760.tar.xz | |
ext4: drop ec_type from the ext4_ext_cache structure
We can encode the ec_type information by using ee_len == 0 to denote
EXT4_EXT_CACHE_NO, ee_start == 0 to denote EXT4_EXT_CACHE_GAP, and if
neither is true, then the cache type must be EXT4_EXT_CACHE_EXTENT.
This allows us to reduce the size of ext4_ext_inode by another 8
bytes. (ec_type is 4 bytes, plus another 4 bytes of padding)
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/ext4_extents.h')
| -rw-r--r-- | fs/ext4/ext4_extents.h | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/fs/ext4/ext4_extents.h b/fs/ext4/ext4_extents.h index dfdda1766927..2e29abb30f76 100644 --- a/fs/ext4/ext4_extents.h +++ b/fs/ext4/ext4_extents.h @@ -119,10 +119,6 @@ struct ext4_ext_path { * structure for external API */ -#define EXT4_EXT_CACHE_NO 0 -#define EXT4_EXT_CACHE_GAP 1 -#define EXT4_EXT_CACHE_EXTENT 2 - /* * to be called by ext4_ext_walk_space() * negative retcode - error @@ -197,7 +193,7 @@ static inline unsigned short ext_depth(struct inode *inode) static inline void ext4_ext_invalidate_cache(struct inode *inode) { - EXT4_I(inode)->i_cached_extent.ec_type = EXT4_EXT_CACHE_NO; + EXT4_I(inode)->i_cached_extent.ec_len = 0; } static inline void ext4_ext_mark_uninitialized(struct ext4_extent *ext) |