diff options
| author | Ingo Molnar <mingo@kernel.org> | 2012-06-11 10:51:35 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-06-11 10:51:35 +0200 |
| commit | c3e228d59bd2054fd57f7f146ef0f6fb0e1996b7 (patch) | |
| tree | 1817910408fa7b5027e463725a6eb54933c71928 /kernel/cgroup.c | |
| parent | 7eb9ba5ed312ec6ed9d22259c5da1acb7cf4bd29 (diff) | |
| parent | cfaf025112d3856637ff34a767ef785ef5cf2ca9 (diff) | |
Merge tag 'v3.5-rc2' into perf/core
Merge in Linux 3.5-rc2 - to pick up fixes.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/cgroup.c')
| -rw-r--r-- | kernel/cgroup.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 0f3527d6184a..72fcd3069a90 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -896,10 +896,13 @@ static void cgroup_diput(struct dentry *dentry, struct inode *inode) mutex_unlock(&cgroup_mutex); /* - * Drop the active superblock reference that we took when we - * created the cgroup + * We want to drop the active superblock reference from the + * cgroup creation after all the dentry refs are gone - + * kill_sb gets mighty unhappy otherwise. Mark + * dentry->d_fsdata with cgroup_diput() to tell + * cgroup_d_release() to call deactivate_super(). */ - deactivate_super(cgrp->root->sb); + dentry->d_fsdata = cgroup_diput; /* * if we're getting rid of the cgroup, refcount should ensure @@ -925,6 +928,13 @@ static int cgroup_delete(const struct dentry *d) return 1; } +static void cgroup_d_release(struct dentry *dentry) +{ + /* did cgroup_diput() tell me to deactivate super? */ + if (dentry->d_fsdata == cgroup_diput) + deactivate_super(dentry->d_sb); +} + static void remove_dir(struct dentry *d) { struct dentry *parent = dget(d->d_parent); @@ -1532,6 +1542,7 @@ static int cgroup_get_rootdir(struct super_block *sb) static const struct dentry_operations cgroup_dops = { .d_iput = cgroup_diput, .d_delete = cgroup_delete, + .d_release = cgroup_d_release, }; struct inode *inode = |