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| author | Zefan Li <lizefan@huawei.com> | 2014-09-26 08:03:25 +0400 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2014-09-26 08:16:23 +0400 |
| commit | e756c7b698604f11a979f2781d06eb7b80aba363 (patch) | |
| tree | d9deebb021eb70e509f0c44b4094bc18509ea036 /mm | |
| parent | 0c7bf3e8cab7900e17ce7f97104c39927d835469 (diff) | |
| download | linux-e756c7b698604f11a979f2781d06eb7b80aba363.tar.xz | |
Revert "cgroup: remove redundant variable in cgroup_mount()"
This reverts commit 0c7bf3e8cab7900e17ce7f97104c39927d835469.
If there are child cgroups in the cgroupfs and then we umount it,
the superblock will be destroyed but the cgroup_root will be kept
around. When we mount it again, cgroup_mount() will find this
cgroup_root and allocate a new sb for it.
So with this commit we will be trapped in a dead loop in the case
described above, because kernfs_pin_sb() keeps returning NULL.
Currently I don't see how we can avoid using both pinned_sb and
new_sb, so just revert it.
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Reported-by: Andrey Wagin <avagin@gmail.com>
Signed-off-by: Zefan Li <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions