Messages in this thread Patch in this message | | | Date | Fri, 13 Mar 2009 12:21:29 +0100 | From | Peter Zijlstra <> | Subject | [PATCH 04/11] perf_counter: use list_move_tail |
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Instead of del/add use a move list-op.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> --- kernel/perf_counter.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)
Index: linux-2.6/kernel/perf_counter.c =================================================================== --- linux-2.6.orig/kernel/perf_counter.c +++ linux-2.6/kernel/perf_counter.c @@ -89,8 +89,7 @@ list_del_counter(struct perf_counter *co 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_count */ 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); --
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