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Merge branch 'for-4.11-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup fix from Tejun Heo: "Unfortunately, the commit to fix the cgroup mount race in the previous pull request can lead to hangs. The original bug has been around for a while and isn't too likely to be triggered in usual use cases. Revert the commit for now" * 'for-4.11-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: Revert "cgroup: avoid attaching a cgroup root to two different superblocks"
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commit
11c994d9a5
@ -1146,7 +1146,7 @@ struct dentry *cgroup1_mount(struct file_system_type *fs_type, int flags,
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* path is super cold. Let's just sleep a bit and retry.
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*/
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pinned_sb = kernfs_pin_sb(root->kf_root, NULL);
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if (IS_ERR_OR_NULL(pinned_sb) ||
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if (IS_ERR(pinned_sb) ||
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!percpu_ref_tryget_live(&root->cgrp.self.refcnt)) {
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mutex_unlock(&cgroup_mutex);
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if (!IS_ERR_OR_NULL(pinned_sb))
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