Messages in this thread Patch in this message | | | Date | Fri, 13 Mar 2009 13:00:57 GMT | From | Peter Zijlstra <> | Subject | [tip:perfcounters/core] perf_counter: use list_move_tail() |
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Commit-ID: 0bc8915410d0819ffb7e6c724df683896e208b46 Gitweb: http://git.kernel.org/tip/0bc8915410d0819ffb7e6c724df683896e208b46 Author: Peter Zijlstra <a.p.zijlstra@chello.nl> AuthorDate: Fri, 13 Mar 2009 12:21:29 +0100 Commit: Ingo Molnar <mingo@elte.hu> CommitDate: Fri, 13 Mar 2009 13:59:08 +0100
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> LKML-Reference: <20090313112301.288765724@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
--- kernel/perf_counter.c | 6 ++---- 1 files changed, 2 insertions(+), 4 deletions(-)
diff --git a/kernel/perf_counter.c b/kernel/perf_counter.c index b2e8389..0fe22c9 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);
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