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authorLi Zefan <lizf@cn.fujitsu.com>2009-05-12 10:47:33 +0000
committerDavid S. Miller <davem@davemloft.net>2009-05-17 11:59:48 -0700
commitcb1c4b71f6da18fa98bab4af055f391d01bee8ba (patch)
tree930bdf761d1dfa6a6ef4732866378f3fb37ad5bd /net
parent3a6d54c56326c29c5357655779cfe6cf36481b17 (diff)
cls_cgroup: remove unneeded cgroup_lock
We can remove this lock here, since we are in cgroup write handler and thus the cgrp is guaranteed to be valid, and no lock is needed when writing a u32 variable. Signed-off-by: Li Zefan <lizf@cn.fujitsuc.com> Acked-by: Paul Menage <menage@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/sched/cls_cgroup.c6
1 files changed, 0 insertions, 6 deletions
diff --git a/net/sched/cls_cgroup.c b/net/sched/cls_cgroup.c
index 91a3db4a76f..1ab4542e61e 100644
--- a/net/sched/cls_cgroup.c
+++ b/net/sched/cls_cgroup.c
@@ -62,13 +62,7 @@ static u64 read_classid(struct cgroup *cgrp, struct cftype *cft)
static int write_classid(struct cgroup *cgrp, struct cftype *cft, u64 value)
{
- if (!cgroup_lock_live_group(cgrp))
- return -ENODEV;
-
cgrp_cls_state(cgrp)->classid = (u32) value;
-
- cgroup_unlock();
-
return 0;
}