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| author | Jörn Engel <joern@logfs.org> | 2010-04-25 08:54:42 +0200 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2010-04-25 08:54:42 +0200 |
| commit | 5129a469a91a91427334c40e29e64c6d0ab68caf (patch) | |
| tree | 141a17cbea94c7c9c038187cc7081e1c688eac55 /fs/super.c | |
| parent | 7e2455c1a123ceadbb35150a610d61e8443fd340 (diff) | |
| download | linux-5129a469a91a91427334c40e29e64c6d0ab68caf.tar.gz linux-5129a469a91a91427334c40e29e64c6d0ab68caf.tar.bz2 linux-5129a469a91a91427334c40e29e64c6d0ab68caf.zip | |
Catch filesystems lacking s_bdi
noop_backing_dev_info is used only as a flag to mark filesystems that
don't have any backing store, like tmpfs, procfs, spufs, etc.
Signed-off-by: Joern Engel <joern@logfs.org>
Changed the BUG_ON() to a WARN_ON(). Note that adding dirty inodes
to the noop_backing_dev_info is not legal and will not result in
them being flushed, but we already catch this condition in
__mark_inode_dirty() when checking for a registered bdi.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'fs/super.c')
| -rw-r--r-- | fs/super.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/fs/super.c b/fs/super.c index f35ac6022109..dc72491a19f9 100644 --- a/fs/super.c +++ b/fs/super.c @@ -693,6 +693,7 @@ int set_anon_super(struct super_block *s, void *data) return -EMFILE; } s->s_dev = MKDEV(0, dev & MINORMASK); + s->s_bdi = &noop_backing_dev_info; return 0; } @@ -954,10 +955,11 @@ vfs_kern_mount(struct file_system_type *type, int flags, const char *name, void if (error < 0) goto out_free_secdata; BUG_ON(!mnt->mnt_sb); + WARN_ON(!mnt->mnt_sb->s_bdi); - error = security_sb_kern_mount(mnt->mnt_sb, flags, secdata); - if (error) - goto out_sb; + error = security_sb_kern_mount(mnt->mnt_sb, flags, secdata); + if (error) + goto out_sb; /* * filesystems should never set s_maxbytes larger than MAX_LFS_FILESIZE |