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| author |   David Sterba <dsterba@suse.com> | 2019-10-01 19:57:37 +0200 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2019-11-18 12:46:52 +0100 |
| commit | 4143cb8b6f00910e73a7503fd922211b9f08cf48 (patch) | |
| tree | 6e61a1f2ac756102f27cf4dc9a0ca19359259c81 /fs/btrfs/volumes.h | |
| parent | btrfs: add __cold attribute to more functions (diff) | |
| download | linux-dev-4143cb8b6f00910e73a7503fd922211b9f08cf48.tar.xz linux-dev-4143cb8b6f00910e73a7503fd922211b9f08cf48.zip | |
btrfs: add const function attribute
For some reason the attribute is called __attribute_const__ and not
__const, marks functions that have no observable effects on program
state, IOW not reading pointers, just the arguments and calculating a
value. Allows the compiler to do some optimizations, based on
-Wsuggest-attribute=const . The effects are rather small, though, about
60 bytes decrese of btrfs.ko.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/volumes.h')
| -rw-r--r-- | fs/btrfs/volumes.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h index a7da1f3e3627..0ae0677a8d86 100644 --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h @@ -571,7 +571,7 @@ static inline enum btrfs_raid_types btrfs_bg_flags_to_raid_index(u64 flags) void btrfs_commit_device_sizes(struct btrfs_transaction *trans); -struct list_head *btrfs_get_fs_uuids(void); +struct list_head * __attribute_const__ btrfs_get_fs_uuids(void); void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info); void btrfs_reset_fs_info_ptr(struct btrfs_fs_info *fs_info); bool btrfs_check_rw_degradable(struct btrfs_fs_info *fs_info, |