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Merge tag 'cgroup-for-6.1-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

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Pull cgroup fixes from Tejun Heo:

 - Fix a recent regression where a sleeping kernfs function is called
   with css_set_lock (spinlock) held

 - Revert the commit to enable cgroup1 support for cgroup_get_from_fd/file()

   Multiple users assume that the lookup only works for cgroup2 and
   breaks when fed a cgroup1 file. Instead, introduce a separate set of
   functions to lookup both v1 and v2 and use them where the user
   explicitly wants to support both versions.

 - Compat update for tools/perf/util/bpf_skel/bperf_cgroup.bpf.c.

 - Add Josef Bacik as a blkcg maintainer.

* tag 'cgroup-for-6.1-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  blkcg: Update MAINTAINERS entry
  mm: cgroup: fix comments for get from fd/file helpers
  perf stat: Support old kernels for bperf cgroup counting
  bpf: cgroup_iter: support cgroup1 using cgroup fd
  cgroup: add cgroup_v1v2_get_from_[fd/file]()
  Revert "cgroup: enable cgroup_get_from_file() on cgroup1"
  cgroup: Reorganize css_set_lock and kernfs path processing
This commit is contained in:
Linus Torvalds
2022-10-17 18:52:43 -07:00
parent bbb8ceb5e2 79a818b508
commit bb1a114646
4 changed files with 83 additions and 21 deletions
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include/linux/cgroup.h
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@@ -106,6 +106,7 @@ struct cgroup_subsys_state *css_tryget_online_from_dir(struct dentry *dentry,
struct cgroup *cgroup_get_from_path(const char *path);
struct cgroup *cgroup_get_from_fd(int fd);
struct cgroup *cgroup_v1v2_get_from_fd(int fd);
int cgroup_attach_task_all(struct task_struct *from, struct task_struct *);
int cgroup_transfer_tasks(struct cgroup *to, struct cgroup *from);