f2fs: don't get FREEZE lock in f2fs_evict_inode in frozen fs
BugLink: https://bugs.launchpad.net/bugs/1969110
[ Upstream commit
ba900534f807f0b327c92d5141c85d2313e2d55c ]
Let's purge inode cache in order to avoid the below deadlock.
[freeze test] shrinkder
freeze_super
- pwercpu_down_write(SB_FREEZE_FS)
- super_cache_scan
- down_read(&sb->s_umount)
- prune_icache_sb
- dispose_list
- evict
- f2fs_evict_inode
thaw_super
- down_write(&sb->s_umount);
- __percpu_down_read(SB_FREEZE_FS)
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
(cherry picked from commit
58d3aa672d1386d4ccd2c11d6f1a09675c30f57a)
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>