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Date: Mon, 24 Mar 2014 00:17:18 +0530 From: Monam Agarwal <monamagarwal123@...il.com> To: tj@...nel.org, lizefan@...wei.com, containers@...ts.linux-foundation.org, cgroups@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH] kernel: Use RCU_INIT_POINTER(x, NULL) in cgroup.c This patch replaces rcu_assign_pointer(x, NULL) with RCU_INIT_POINTER(x, NULL) The rcu_assign_pointer() ensures that the initialization of a structure is carried out before storing a pointer to that structure. And in the case of the NULL pointer, there is no structure to initialize. So, rcu_assign_pointer(p, NULL) can be safely converted to RCU_INIT_POINTER(p, NULL) Signed-off-by: Monam Agarwal <monamagarwal123@...il.com> --- kernel/cgroup.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 105f273..3462f62 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -4033,7 +4033,7 @@ static void css_release(struct percpu_ref *ref) struct cgroup_subsys_state *css = container_of(ref, struct cgroup_subsys_state, refcnt); - rcu_assign_pointer(css->cgroup->subsys[css->ss->subsys_id], NULL); + RCU_INIT_POINTER(css->cgroup->subsys[css->ss->subsys_id], NULL); call_rcu(&css->rcu_head, css_free_rcu_fn); } -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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