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>
diff --git a/fs/ext4/ext4_extents.h b/fs/ext4/ext4_extents.h
index dfdda17..2e29abb 100644
--- a/fs/ext4/ext4_extents.h
+++ b/fs/ext4/ext4_extents.h
@@ -119,10 +119,6 @@
* 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 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)