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| author | Ingo Molnar <mingo@elte.hu> | 2010-08-25 13:09:58 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-08-25 13:10:00 +0200 |
| commit | 7de5d895b2020260190db0021de646f3f22f755e (patch) | |
| tree | 51d012f0b76a2ec1bd3b4837690faf1087f37056 /fs/pnode.c | |
| parent | 04fba67163a9e6132614b72b33bb2743bd33ffb3 (diff) | |
| parent | 502adf5778f4151dcba3f64dd6ed322151f3712c (diff) | |
| download | linux-7de5d895b2020260190db0021de646f3f22f755e.tar.bz2 | |
Merge branch 'linus' into perf/core
Merge reason: pick up perf fixes
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'fs/pnode.c')
| -rw-r--r-- | fs/pnode.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/fs/pnode.c b/fs/pnode.c index 5cc564a83149..8066b8dd748f 100644 --- a/fs/pnode.c +++ b/fs/pnode.c @@ -126,6 +126,9 @@ static int do_make_slave(struct vfsmount *mnt) return 0; } +/* + * vfsmount lock must be held for write + */ void change_mnt_propagation(struct vfsmount *mnt, int type) { if (type == MS_SHARED) { @@ -270,12 +273,12 @@ int propagate_mnt(struct vfsmount *dest_mnt, struct dentry *dest_dentry, prev_src_mnt = child; } out: - spin_lock(&vfsmount_lock); + br_write_lock(vfsmount_lock); while (!list_empty(&tmp_list)) { child = list_first_entry(&tmp_list, struct vfsmount, mnt_hash); umount_tree(child, 0, &umount_list); } - spin_unlock(&vfsmount_lock); + br_write_unlock(vfsmount_lock); release_mounts(&umount_list); return ret; } @@ -296,6 +299,8 @@ static inline int do_refcount_check(struct vfsmount *mnt, int count) * other mounts its parent propagates to. * Check if any of these mounts that **do not have submounts** * have more references than 'refcnt'. If so return busy. + * + * vfsmount lock must be held for read or write */ int propagate_mount_busy(struct vfsmount *mnt, int refcnt) { @@ -353,6 +358,8 @@ static void __propagate_umount(struct vfsmount *mnt) * collect all mounts that receive propagation from the mount in @list, * and return these additional mounts in the same list. * @list: the list of mounts to be unmounted. + * + * vfsmount lock must be held for write */ int propagate_umount(struct list_head *list) { |