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| author | David Sterba <dsterba@suse.com> | 2019-11-18 23:27:55 +0100 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2019-11-18 23:38:46 +0100 |
| commit | 429aebc0a9a063667dba21244386f96e5b4d7330 (patch) | |
| tree | 9e1447189619752d8851a176167b2074df992553 /fs | |
| parent | 3e1740993e43116b3bc71b0aad1e6872f6ccf341 (diff) | |
| download | linux-429aebc0a9a063667dba21244386f96e5b4d7330.tar.bz2 | |
btrfs: get bdev directly from fs_devices in submit_extent_page
This is preparatory patch to remove @bdev parameter from
submit_extent_page. It can't be removed completely, because the cgroups
need it for wbc when initializing the bio
wbc_init_bio
bio_associate_blkg_from_css
dereference bdev->bi_disk->queue
The bdev pointer is the same as latest_bdev, thus no functional change.
We can retrieve it from fs_devices that's reachable through several
dereferences. The local variable shadows the parameter, but that's only
temporary.
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/extent_io.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index ceb3c028894e..9a2339a54a9d 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -2987,13 +2987,16 @@ static int submit_extent_page(unsigned int opf, struct extent_io_tree *tree, } bio = btrfs_bio_alloc(offset); - bio_set_dev(bio, bdev); bio_add_page(bio, page, page_size, pg_offset); bio->bi_end_io = end_io_func; bio->bi_private = tree; bio->bi_write_hint = page->mapping->host->i_write_hint; bio->bi_opf = opf; if (wbc) { + struct block_device *bdev; + + bdev = BTRFS_I(page->mapping->host)->root->fs_info->fs_devices->latest_bdev; + bio_set_dev(bio, bdev); wbc_init_bio(wbc, bio); wbc_account_cgroup_owner(wbc, page, page_size); } |