[RFC PATCH 9/9] cgroup: rework cgroup_path
Gao feng
gaofeng at cn.fujitsu.com
Mon Dec 17 06:43:35 UTC 2012
use cgrp == cgrp->top_cgroup instead of cgrp == NULL
Signed-off-by: Gao feng <gaofeng at cn.fujitsu.com>
---
kernel/cgroup.c | 8 +++++---
1 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index b0caa1d..c111cf9 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -1976,12 +1976,14 @@ int cgroup_path(const struct cgroup *cgrp, char *buf, int buflen)
if ((start -= len) < buf)
return -ENAMETOOLONG;
memcpy(start, dentry->d_name.name, len);
- cgrp = cgrp->parent;
- if (!cgrp)
+
+ if (cgrp == cgrp->top_cgroup)
break;
+ cgrp = cgrp->parent;
dentry = cgrp->dentry;
- if (!cgrp->parent)
+
+ if (cgrp == cgrp->top_cgroup)
continue;
if (--start < buf)
return -ENAMETOOLONG;
--
1.7.7.6
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