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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/file-item.c | |
| parent | 55fc29bed8ddb4c3848ecf8cf7133e34c946f223 (diff) | |
| download | linux-stable-223486c27b369a10ceb6180c40d7aa354e903446.tar.gz linux-stable-223486c27b369a10ceb6180c40d7aa354e903446.tar.bz2 linux-stable-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/file-item.c')
| -rw-r--r-- | fs/btrfs/file-item.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c index 90e673847b47..73ec6c5eadcb 100644 --- a/fs/btrfs/file-item.c +++ b/fs/btrfs/file-item.c @@ -181,7 +181,7 @@ btrfs_lookup_csum(struct btrfs_trans_handle *trans, struct btrfs_csum_item *item; struct extent_buffer *leaf; u64 csum_offset = 0; - const u16 csum_size = fs_info->csum_size; + const u32 csum_size = fs_info->csum_size; int csums_in_item; file_key.objectid = BTRFS_EXTENT_CSUM_OBJECTID; @@ -270,7 +270,7 @@ blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 diff; int nblocks; int count = 0; - const u16 csum_size = fs_info->csum_size; + const u32 csum_size = fs_info->csum_size; if (!fs_info->csum_root || (BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM)) return BLK_STS_OK; @@ -409,7 +409,7 @@ int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, int ret; size_t size; u64 csum_end; - const u16 csum_size = fs_info->csum_size; + const u32 csum_size = fs_info->csum_size; ASSERT(IS_ALIGNED(start, fs_info->sectorsize) && IS_ALIGNED(end + 1, fs_info->sectorsize)); @@ -540,7 +540,7 @@ blk_status_t btrfs_csum_one_bio(struct btrfs_inode *inode, struct bio *bio, int i; u64 offset; unsigned nofs_flag; - const u16 csum_size = fs_info->csum_size; + const u32 csum_size = fs_info->csum_size; nofs_flag = memalloc_nofs_save(); sums = kvzalloc(btrfs_ordered_sum_size(fs_info, bio->bi_iter.bi_size), @@ -638,7 +638,7 @@ static noinline void truncate_one_csum(struct btrfs_fs_info *fs_info, u64 bytenr, u64 len) { struct extent_buffer *leaf; - const u16 csum_size = fs_info->csum_size; + const u32 csum_size = fs_info->csum_size; u64 csum_end; u64 end_byte = bytenr + len; u32 blocksize_bits = fs_info->sectorsize_bits; @@ -692,7 +692,7 @@ int btrfs_del_csums(struct btrfs_trans_handle *trans, u64 csum_end; struct extent_buffer *leaf; int ret; - const u16 csum_size = fs_info->csum_size; + const u32 csum_size = fs_info->csum_size; u32 blocksize_bits = fs_info->sectorsize_bits; ASSERT(root == fs_info->csum_root || @@ -847,7 +847,7 @@ int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, int index = 0; int found_next; int ret; - const u16 csum_size = fs_info->csum_size; + const u32 csum_size = fs_info->csum_size; path = btrfs_alloc_path(); if (!path) |