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SubjectRe: [PATCH] kernfs: fix kernfs_node_from_dentry()
On Fri, Feb 14, 2014 at 04:57:27PM +0800, Li Zefan wrote:
> Currently kernfs_node_from_dentry() returns NULL for root dentry,
> because root_dentry->d_op == NULL.
>
> Due to this bug cgroupstats_build() returns -EINVAL for root cgroup.
>
> # mount -t cgroup -o cpuacct /cgroup
> # Documentation/accounting/getdelays -C /cgroup
> fatal reply error, errno -22
>
> With this fix:
>
> # Documentation/accounting/getdelays -C /cgroup
> sleeping 305, blocked 0, running 1, stopped 0, uninterruptible 1
>
> Signed-off-by: Li Zefan <lizefan@huawei.com>

Acked-by: Tejun Heo <tj@kernel.org>

Thanks!

--
tejun


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