diff options
| author | Christoph Hellwig <hch@lst.de> | 2021-11-05 13:36:58 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-11-06 13:30:34 -0700 |
| commit | 0b3ea0926afb8dde70cfab00316ae0a70b93a7cc (patch) | |
| tree | 3c9607304496a064a4d30e91291241cd4caa7e9d /fs/super.c | |
| parent | 9718c59c0a1604350c06ffd87d598f03dcf5e9ca (diff) | |
| download | lwn-0b3ea0926afb8dde70cfab00316ae0a70b93a7cc.tar.gz lwn-0b3ea0926afb8dde70cfab00316ae0a70b93a7cc.zip | |
fs: explicitly unregister per-superblock BDIs
Add a new SB_I_ flag to mark superblocks that have an ephemeral bdi
associated with them, and unregister it when the superblock is shut
down.
Link: https://lkml.kernel.org/r/20211021124441.668816-4-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/super.c')
| -rw-r--r-- | fs/super.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/super.c b/fs/super.c index bcef3a6f4c4b..3bfc0f8fbd5b 100644 --- a/fs/super.c +++ b/fs/super.c @@ -476,6 +476,8 @@ void generic_shutdown_super(struct super_block *sb) spin_unlock(&sb_lock); up_write(&sb->s_umount); if (sb->s_bdi != &noop_backing_dev_info) { + if (sb->s_iflags & SB_I_PERSB_BDI) + bdi_unregister(sb->s_bdi); bdi_put(sb->s_bdi); sb->s_bdi = &noop_backing_dev_info; } @@ -1562,6 +1564,7 @@ int super_setup_bdi_name(struct super_block *sb, char *fmt, ...) } WARN_ON(sb->s_bdi != &noop_backing_dev_info); sb->s_bdi = bdi; + sb->s_iflags |= SB_I_PERSB_BDI; return 0; } |