taskstats: Use this_cpu_ops
Christoph Lameter [Wed, 8 Dec 2010 16:42:22 +0000 (17:42 +0100)]
Use this_cpu_inc_return in one place and avoid ugly __raw_get_cpu in
another.

V3->V4:
- Fix off by one.

V4-V4f:
- Use &listener_array

Cc: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

kernel/taskstats.c

index c8231fb..5f82ccd 100644 (file)
@@ -89,8 +89,7 @@ static int prepare_reply(struct genl_info *info, u8 cmd, struct sk_buff **skbp,
                return -ENOMEM;
 
        if (!info) {
-               int seq = get_cpu_var(taskstats_seqnum)++;
-               put_cpu_var(taskstats_seqnum);
+               int seq = this_cpu_inc_return(taskstats_seqnum) - 1;
 
                reply = genlmsg_put(skb, 0, seq, &family, 0, cmd);
        } else
@@ -581,7 +580,7 @@ void taskstats_exit(struct task_struct *tsk, int group_dead)
                fill_tgid_exit(tsk);
        }
 
-       listeners = &__raw_get_cpu_var(listener_array);
+       listeners = __this_cpu_ptr(&listener_array);
        if (list_empty(&listeners->list))
                return;