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| author | Li Zefan <lizefan@huawei.com> | 2012-07-09 20:22:35 -0600 |
|---|---|---|
| committer | Chris Mason <chris.mason@fusionio.com> | 2012-07-23 16:28:06 -0400 |
| commit | 18077bb413687f96bd168efcfb2b8778529e3b74 (patch) | |
| tree | 44adcefcc2177267437826b800800021cc2f4faf /fs/btrfs/ctree.h | |
| parent | 293f7e07405a63975cee4e95a2cfa0c17b34b3aa (diff) | |
| download | blackbird-op-linux-18077bb413687f96bd168efcfb2b8778529e3b74.tar.gz blackbird-op-linux-18077bb413687f96bd168efcfb2b8778529e3b74.zip | |
Btrfs: rewrite BTRFS_SETGET_FUNCS
BTRFS_SETGET_FUNCS macro is used to generate btrfs_set_foo() and
btrfs_foo() functions, which read and write specific fields in the
extent buffer.
The total number of set/get functions is ~200, but in fact we only
need 8 functions: 2 for u8 field, 2 for u16, 2 for u32 and 2 for u64.
It results in redunction of ~37K bytes.
text data bss dec hex filename
629661 12489 216 642366 9cd3e fs/btrfs/btrfs.o.orig
592637 12489 216 605342 93c9e fs/btrfs/btrfs.o
Signed-off-by: Li Zefan <lizefan@huawei.com>
Diffstat (limited to 'fs/btrfs/ctree.h')
| -rw-r--r-- | fs/btrfs/ctree.h | 53 |
1 files changed, 47 insertions, 6 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 6761490b91cd..a0ee2f8e0566 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -1623,13 +1623,54 @@ static inline void btrfs_init_map_token (struct btrfs_map_token *token) offsetof(type, member), \ sizeof(((type *)0)->member))) -#ifndef BTRFS_SETGET_FUNCS +#define DECLARE_BTRFS_SETGET_BITS(bits) \ +u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \ + unsigned long off, \ + struct btrfs_map_token *token); \ +void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \ + unsigned long off, u##bits val, \ + struct btrfs_map_token *token); \ +static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \ + unsigned long off) \ +{ \ + return btrfs_get_token_##bits(eb, ptr, off, NULL); \ +} \ +static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \ + unsigned long off, u##bits val) \ +{ \ + btrfs_set_token_##bits(eb, ptr, off, val, NULL); \ +} + +DECLARE_BTRFS_SETGET_BITS(8) +DECLARE_BTRFS_SETGET_BITS(16) +DECLARE_BTRFS_SETGET_BITS(32) +DECLARE_BTRFS_SETGET_BITS(64) + #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ -u##bits btrfs_##name(struct extent_buffer *eb, type *s); \ -u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, struct btrfs_map_token *token); \ -void btrfs_set_token_##name(struct extent_buffer *eb, type *s, u##bits val, struct btrfs_map_token *token);\ -void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val); -#endif +static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \ +{ \ + BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ + return btrfs_get_##bits(eb, s, offsetof(type, member)); \ +} \ +static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \ + u##bits val) \ +{ \ + BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ + btrfs_set_##bits(eb, s, offsetof(type, member), val); \ +} \ +static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \ + struct btrfs_map_token *token) \ +{ \ + BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ + return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \ +} \ +static inline void btrfs_set_token_##name(struct extent_buffer *eb, \ + type *s, u##bits val, \ + struct btrfs_map_token *token) \ +{ \ + BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ + btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \ +} #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ static inline u##bits btrfs_##name(struct extent_buffer *eb) \ |
