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btrfs: use the bbio file offset in btrfs_submit_compressed_read

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struct btrfs_bio now has a file_offset field set up by all submitters.
Use that in btrfs_submit_compressed_read instead of recalculating the
value.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Christoph Hellwig 2023-02-10 08:48:36 +01:00 committed by David Sterba
parent 798c9fc74d
commit e7aff33e31
1 changed files with 1 additions and 4 deletions
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5
fs/btrfs/compression.c
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@ -533,7 +533,7 @@ void btrfs_submit_compressed_read(struct bio *bio, int mirror_num)
struct bio *comp_bio;
const u64 disk_bytenr = bio->bi_iter.bi_sector << SECTOR_SHIFT;
u64 cur_disk_byte = disk_bytenr;
u64 file_offset;
u64 file_offset = btrfs_bio(bio)->file_offset;
u64 em_len;
u64 em_start;
struct extent_map *em;
@ -542,9 +542,6 @@ void btrfs_submit_compressed_read(struct bio *bio, int mirror_num)
blk_status_t ret;
int ret2;
file_offset = bio_first_bvec_all(bio)->bv_offset +
page_offset(bio_first_page_all(bio));
/* we need the actual starting offset of this extent in the file */
read_lock(&em_tree->lock);
em = lookup_extent_mapping(em_tree, file_offset, fs_info->sectorsize);