Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild

[powerpc.git] / fs / namespace.c

diff --git a/fs/namespace.c b/fs/namespace.c
index 71e75bc..2c5f1f8 100644 (file)
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -43,9 +43,9 @@ __cacheline_aligned_in_smp DEFINE_SPINLOCK(vfsmount_lock);
 
 static int event;
 
-static struct list_head *mount_hashtable;
+static struct list_head *mount_hashtable __read_mostly;
 static int hash_mask __read_mostly, hash_bits __read_mostly;
-static kmem_cache_t *mnt_cache;
+static kmem_cache_t *mnt_cache __read_mostly;
 static struct rw_semaphore namespace_sem;
 
 /* /sys/fs */
@@ -459,9 +459,9 @@ int may_umount_tree(struct vfsmount *mnt)
        spin_unlock(&vfsmount_lock);
 
        if (actual_refs > minimum_refs)
-               return -EBUSY;
+               return 0;
 
-       return 0;
+       return 1;
 }
 
 EXPORT_SYMBOL(may_umount_tree);
@@ -481,10 +481,10 @@ EXPORT_SYMBOL(may_umount_tree);
  */
 int may_umount(struct vfsmount *mnt)
 {
-       int ret = 0;
+       int ret = 1;
        spin_lock(&vfsmount_lock);
        if (propagate_mount_busy(mnt, 2))
-               ret = -EBUSY;
+               ret = 0;
        spin_unlock(&vfsmount_lock);
        return ret;
 }
@@ -899,11 +899,13 @@ static int do_change_type(struct nameidata *nd, int flag)
 /*
  * do loopback mount.
  */
-static int do_loopback(struct nameidata *nd, char *old_name, int recurse)
+static int do_loopback(struct nameidata *nd, char *old_name, unsigned long flags, int mnt_flags)
 {
        struct nameidata old_nd;
        struct vfsmount *mnt = NULL;
+       int recurse = flags & MS_REC;
        int err = mount_is_safe(nd);
+
        if (err)
                return err;
        if (!old_name || !*old_name)
@@ -937,6 +939,7 @@ static int do_loopback(struct nameidata *nd, char *old_name, int recurse)
                spin_unlock(&vfsmount_lock);
                release_mounts(&umount_list);
        }
+       mnt->mnt_flags = mnt_flags;
 
 out:
        up_write(&namespace_sem);
@@ -1350,7 +1353,7 @@ long do_mount(char *dev_name, char *dir_name, char *type_page,
                retval = do_remount(&nd, flags & ~MS_REMOUNT, mnt_flags,
                                    data_page);
        else if (flags & MS_BIND)
-               retval = do_loopback(&nd, dev_name, flags & MS_REC);
+               retval = do_loopback(&nd, dev_name, flags, mnt_flags);
        else if (flags & (MS_SHARED | MS_PRIVATE | MS_SLAVE | MS_UNBINDABLE))
                retval = do_change_type(&nd, flags);
        else if (flags & MS_MOVE)