Pull more btrfs updates from David Sterba:
"This removes unused code of free space caching, disabled in 7.3
(commit 545e560a5b: "btrfs: disable v1 space cache").
It's been the original free space cache feature, superseded by free
space tree (4.5) and mkfs default since 5.15. The grace period was
sufficiently long, backward compatibility still exists with a
performance impact, effectively as if mounted with '-o nospace_cache'"
* tag 'for-7.4-part2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: remove TRANS_JOIN_NOLOCK
btrfs: stop reading free space inodes from the commit root
btrfs: stop special-casing free space inodes in the delalloc accounting
btrfs: remove the free space inode special cases from the COW paths
btrfs: remove the free space inode ordered extent special cases
btrfs: remove BTRFS_RESERVE_FLUSH_FREE_SPACE_INODE
btrfs: remove the free space cache trimming ranges
btrfs: replace btrfs_set_free_space_cache_v1_active() with a cleanup helper
btrfs: remove the SPACE_CACHE mount option flag
btrfs: remove btrfs_disk_cache_state
btrfs: remove the v1 space cache load path
btrfs: drop the transaction handle from the prealloc helpers
btrfs: rename cache_write_mutex to dirty_bgs_update_mutex
btrfs: remove the v1 space cache write path
btrfs: remove the free space cache endio workqueue
btrfs: remove the v1 space cache writeout from the transaction commit
btrfs: stop enabling the v1 space cache from the on-disk state
btrfs: update the inode item when removing a free space inode
btrfs: drop the extent maps of the written part of a failed ordered extent
btrfs: fix use-after-free on quota enable allocation failure
Linus Torvalds
390febb580