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author | David Sterba <dsterba@suse.com> | 2019-10-01 19:57:37 +0200 |
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committer | David Sterba <dsterba@suse.com> | 2019-11-18 12:46:52 +0100 |
commit | 4143cb8b6f00910e73a7503fd922211b9f08cf48 (patch) | |
tree | 6e61a1f2ac756102f27cf4dc9a0ca19359259c81 /fs/btrfs/super.c | |
parent | b105e92755b448efd4800e3415dfeae5ad8054e9 (diff) | |
download | linux-4143cb8b6f00910e73a7503fd922211b9f08cf48.tar.bz2 |
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/super.c')
-rw-r--r-- | fs/btrfs/super.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 9c0c53e7d0fc..144933c9b507 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -66,7 +66,7 @@ static struct file_system_type btrfs_root_fs_type; static int btrfs_remount(struct super_block *sb, int *flags, char *data); -const char *btrfs_decode_error(int errno) +const char * __attribute_const__ btrfs_decode_error(int errno) { char *errstr = "unknown"; |