From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date: Fri, 13 Mar 2009 11:21:29 +0000 (+0100)
Subject: perf_counter: use list_move_tail()
X-Git-Tag: v2.6.31-rc1~383^2~482
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=755642322aa66fbc5421a35fd3e1733f73e20083;p=karo-tx-linux.git

perf_counter: use list_move_tail()

Instead of del/add use a move list-op.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/kernel/perf_counter.c b/kernel/perf_counter.c
index b2e838959f3e..0fe22c916e29 100644
--- a/kernel/perf_counter.c
+++ b/kernel/perf_counter.c
@@ -89,8 +89,7 @@ list_del_counter(struct perf_counter *counter, struct perf_counter_context *ctx)
 	list_for_each_entry_safe(sibling, tmp,
 				 &counter->sibling_list, list_entry) {
 
-		list_del_init(&sibling->list_entry);
-		list_add_tail(&sibling->list_entry, &ctx->counter_list);
+		list_move_tail(&sibling->list_entry, &ctx->counter_list);
 		sibling->group_leader = sibling;
 	}
 }
@@ -959,8 +958,7 @@ static void rotate_ctx(struct perf_counter_context *ctx)
 	 */
 	perf_flags = hw_perf_save_disable();
 	list_for_each_entry(counter, &ctx->counter_list, list_entry) {
-		list_del(&counter->list_entry);
-		list_add_tail(&counter->list_entry, &ctx->counter_list);
+		list_move_tail(&counter->list_entry, &ctx->counter_list);
 		break;
 	}
 	hw_perf_restore(perf_flags);