diff options
| author | Dmitry Torokhov <dtor_core@ameritech.net> | 2005-09-09 20:14:47 -0500 |
|---|---|---|
| committer | Dmitry Torokhov <dtor_core@ameritech.net> | 2005-09-09 20:14:47 -0500 |
| commit | d344c5e0856ad03278d8700b503762dbc8b86e12 (patch) | |
| tree | a6d893a643470a3c2580a58f3228a55fa1fd1d82 /fs/namespace.c | |
| parent | 010988e888a0abbe7118635c1b33d049caae6b29 (diff) | |
| parent | 87fc767b832ef5a681a0ff9d203c3289bc3be2bf (diff) | |
Manual merge with Linus
Diffstat (limited to 'fs/namespace.c')
| -rw-r--r-- | fs/namespace.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/fs/namespace.c b/fs/namespace.c index 79bd8a46e1e..34156260c9b 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -40,7 +40,7 @@ static inline int sysfs_init(void) __cacheline_aligned_in_smp DEFINE_SPINLOCK(vfsmount_lock); static struct list_head *mount_hashtable; -static int hash_mask, hash_bits; +static int hash_mask __read_mostly, hash_bits __read_mostly; static kmem_cache_t *mnt_cache; static inline unsigned long hash(struct vfsmount *mnt, struct dentry *dentry) @@ -1334,8 +1334,12 @@ asmlinkage long sys_pivot_root(const char __user *new_root, const char __user *p error = -EINVAL; if (user_nd.mnt->mnt_root != user_nd.dentry) goto out2; /* not a mountpoint */ + if (user_nd.mnt->mnt_parent == user_nd.mnt) + goto out2; /* not attached */ if (new_nd.mnt->mnt_root != new_nd.dentry) goto out2; /* not a mountpoint */ + if (new_nd.mnt->mnt_parent == new_nd.mnt) + goto out2; /* not attached */ tmp = old_nd.mnt; /* make sure we can reach put_old from new_root */ spin_lock(&vfsmount_lock); if (tmp != new_nd.mnt) { |