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authorMiklos Szeredi <mszeredi@suse.cz>2011-11-21 15:11:30 +0400
committerAl Viro <viro@zeniv.linux.org.uk>2012-01-07 08:20:12 +0400
commit39f7c4db1d2d9e2e2a90abdf34811783089d217d (patch)
treecbc3496ce21e26b5891bb4c4d4155853317ddfb3 /fs/super.c
parent34c80b1d93e6e20ca9dea0baf583a5b5510d92d4 (diff)
downloadlinux-39f7c4db1d2d9e2e2a90abdf34811783089d217d.tar.xz
vfs: keep list of mounts for each superblock
Keep track of vfsmounts belonging to a superblock. List is protected by vfsmount_lock. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Tested-by: Toshiyuki Okajima <toshi.okajima@jp.fujitsu.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/super.c')
-rw-r--r--fs/super.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/super.c b/fs/super.c
index 0413f51a9f0f..993ca8f128d6 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -142,6 +142,7 @@ static struct super_block *alloc_super(struct file_system_type *type)
INIT_LIST_HEAD(&s->s_dentry_lru);
INIT_LIST_HEAD(&s->s_inode_lru);
spin_lock_init(&s->s_inode_lru_lock);
+ INIT_LIST_HEAD(&s->s_mounts);
init_rwsem(&s->s_umount);
mutex_init(&s->s_lock);
lockdep_set_class(&s->s_umount, &type->s_umount_key);
@@ -200,6 +201,7 @@ static inline void destroy_super(struct super_block *s)
free_percpu(s->s_files);
#endif
security_sb_free(s);
+ WARN_ON(!list_empty(&s->s_mounts));
kfree(s->s_subtype);
kfree(s->s_options);
kfree(s);