diff options
| -rw-r--r-- | fs/super.c | 2 | ||||
| -rw-r--r-- | fs/sync.c | 4 | ||||
| -rw-r--r-- | mm/backing-dev.c | 2 |
3 files changed, 5 insertions, 3 deletions
@@ -71,6 +71,7 @@ static struct super_block *alloc_super(struct file_system_type *type) #else INIT_LIST_HEAD(&s->s_files); #endif + s->s_bdi = &default_backing_dev_info; INIT_LIST_HEAD(&s->s_instances); INIT_HLIST_BL_HEAD(&s->s_anon); INIT_LIST_HEAD(&s->s_inodes); @@ -1003,6 +1004,7 @@ vfs_kern_mount(struct file_system_type *type, int flags, const char *name, void } BUG_ON(!mnt->mnt_sb); WARN_ON(!mnt->mnt_sb->s_bdi); + WARN_ON(mnt->mnt_sb->s_bdi == &default_backing_dev_info); mnt->mnt_sb->s_flags |= MS_BORN; error = security_sb_kern_mount(mnt->mnt_sb, flags, secdata); @@ -33,7 +33,7 @@ static int __sync_filesystem(struct super_block *sb, int wait) * This should be safe, as we require bdi backing to actually * write out data in the first place */ - if (!sb->s_bdi || sb->s_bdi == &noop_backing_dev_info) + if (sb->s_bdi == &noop_backing_dev_info) return 0; if (sb->s_qcop && sb->s_qcop->quota_sync) @@ -79,7 +79,7 @@ EXPORT_SYMBOL_GPL(sync_filesystem); static void sync_one_sb(struct super_block *sb, void *arg) { - if (!(sb->s_flags & MS_RDONLY) && sb->s_bdi) + if (!(sb->s_flags & MS_RDONLY)) __sync_filesystem(sb, *(int *)arg); } /* diff --git a/mm/backing-dev.c b/mm/backing-dev.c index c91e139..8fe9d34 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -598,7 +598,7 @@ static void bdi_prune_sb(struct backing_dev_info *bdi) spin_lock(&sb_lock); list_for_each_entry(sb, &super_blocks, s_list) { if (sb->s_bdi == bdi) - sb->s_bdi = NULL; + sb->s_bdi = &default_backing_dev_info; } spin_unlock(&sb_lock); } |
