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>
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index d699f5d..f3515d3 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2689,7 +2689,7 @@ blk_status_t btrfs_submit_read_repair(struct inode *inode,
repair_bio->bi_private = failed_bio->bi_private;
if (failed_io_bio->csum) {
- const u16 csum_size = fs_info->csum_size;
+ const u32 csum_size = fs_info->csum_size;
repair_io_bio->csum = repair_io_bio->csum_inline;
memcpy(repair_io_bio->csum,
