Quoting Arnd Bergmann (arnd@xxxxxxxx):
> The newly introduced cgroup_show_path has an extraneous variable
> that gcc warns about:
>
> kernel/cgroup.c: In function 'cgroup_show_path':
> kernel/cgroup.c:1634:15: error: unused variable 'ret' [-Werror=unused-variable]
> int len = 0, ret = 0;
>
> This must have been left over from a previous version that was
> changed before it got committed. I checked the function and
> found that two other variables in the same function have an
> extraneous initialization, presumably another artifact from
> the same rework.
>
> This patch removes the useless warning and the extra initializations.
>
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Thanks, Arnd.
Acked-by: Serge Hallyn <serge.hallyn@xxxxxxxxxxxxx>
> ---
> kernel/cgroup.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/kernel/cgroup.c b/kernel/cgroup.c
> index afea39eb7649..29ead73d2536 100644
> --- a/kernel/cgroup.c
> +++ b/kernel/cgroup.c
> @@ -1631,8 +1631,8 @@ static int rebind_subsystems(struct cgroup_root *dst_root, u16 ss_mask)
> static int cgroup_show_path(struct seq_file *sf, struct kernfs_node *kf_node,
> struct kernfs_root *kf_root)
> {
> - int len = 0, ret = 0;
> - char *buf = NULL;
> + int len;
> + char *buf;
> struct cgroup_root *kf_cgroot = cgroup_root_from_kf(kf_root);
> struct cgroup *ns_cgroup;
>
> --
> 2.7.0
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