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| author | David Sterba <dsterba@suse.com> | 2019-11-28 16:15:04 +0100 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2020-03-23 17:01:45 +0100 |
| commit | 15b6e8a83e910c71e98c368e51b581135539efdf (patch) | |
| tree | f28399ea31a14988d78e7ca8842cf6235c8dbe23 /fs/btrfs/disk-io.c | |
| parent | b79ce3dddd3f1be7515452adfed633d13e45d806 (diff) | |
| download | linux-15b6e8a83e910c71e98c368e51b581135539efdf.tar.gz linux-15b6e8a83e910c71e98c368e51b581135539efdf.tar.bz2 linux-15b6e8a83e910c71e98c368e51b581135539efdf.zip | |
btrfs: reduce pointer intdirections in btree_readpage_end_io_hook
All we need to read is checksum size from fs_info superblock, and
fs_info is provided by extent buffer so we can get rid of the wild
pointer indirections from page/inode/root.
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 | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index f109607ff40b..a4493e5dac22 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -604,9 +604,8 @@ static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio, u64 found_start; int found_level; struct extent_buffer *eb; - struct btrfs_root *root = BTRFS_I(page->mapping->host)->root; - struct btrfs_fs_info *fs_info = root->fs_info; - u16 csum_size = btrfs_super_csum_size(fs_info->super_copy); + struct btrfs_fs_info *fs_info; + u16 csum_size; int ret = 0; u8 result[BTRFS_CSUM_SIZE]; int reads_done; @@ -615,6 +614,8 @@ static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio, goto out; eb = (struct extent_buffer *)page->private; + fs_info = eb->fs_info; + csum_size = btrfs_super_csum_size(fs_info->super_copy); /* the pending IO might have been the only thing that kept this buffer * in memory. Make sure we have a ref for all this other checks |