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| author | David Sterba <dsterba@suse.com> | 2020-07-02 11:27:30 +0200 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2020-12-08 15:53:59 +0100 |
| commit | 223486c27b369a10ceb6180c40d7aa354e903446 (patch) | |
| tree | 26f5d18a30be1e251900158f0af6e65611f56369 /fs/btrfs/disk-io.c | |
| parent | 55fc29bed8ddb4c3848ecf8cf7133e34c946f223 (diff) | |
| download | lwn-223486c27b369a10ceb6180c40d7aa354e903446.tar.gz lwn-223486c27b369a10ceb6180c40d7aa354e903446.zip | |
btrfs: switch cached fs_info::csum_size from u16 to u32
The fs_info value is 32bit, switch also the local u16 variables. This
leads to a better assembly code generated due to movzwl.
This simple change will shave some bytes on x86_64 and release config:
text data bss dec hex filename
1090000 17980 14912 1122892 11224c pre/btrfs.ko
1089794 17980 14912 1122686 11217e post/btrfs.ko
DELTA: -206
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/disk-io.c')
| -rw-r--r-- | fs/btrfs/disk-io.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 95ebe7c84dd7..02b36908327a 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -454,7 +454,7 @@ static int csum_dirty_buffer(struct btrfs_fs_info *fs_info, struct page *page) u64 start = page_offset(page); u64 found_start; u8 result[BTRFS_CSUM_SIZE]; - const u16 csum_size = fs_info->csum_size; + const u32 csum_size = fs_info->csum_size; struct extent_buffer *eb; int ret; |