From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755022AbZBVWH2 (ORCPT ); Sun, 22 Feb 2009 17:07:28 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753012AbZBVWHP (ORCPT ); Sun, 22 Feb 2009 17:07:15 -0500 Received: from mail-bw0-f161.google.com ([209.85.218.161]:36122 "EHLO mail-bw0-f161.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752994AbZBVWHO (ORCPT ); Sun, 22 Feb 2009 17:07:14 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:from:to:cc:date:subject; b=MpXeWmDkqOsUfo2lvSv2uxrTM6dR09mhBgEWrBQswj1ETnC213g0+UIyogDvF0xyYK leqJ+hCSnRWQlgcsVpmy9QvquhLp6NRnfz0BlaOmUSxtFT3Ve/OorwKR1zypYo4Vs5Ei Kdsaupdwn3pMD3ol8OYUwOuI3UDxEI8dtPXhs= Message-ID: <49a1cc8f.2283420a.54d2.ffff8461@mx.google.com> From: Frederic Weisbecker To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Steven Rostedt , Arnaldo Carvalho de Melo Date: Sun, 22 Feb 2009 22:56:08 +0100 Subject: [PATCH] tracing/ftrace: add missing wake-up on some callsites Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Impact: fix unwaken pipe Now that we use a common wakeup infrastructure, we must append a wakeup on few callsites which lack it or tasks reading trace_pipe will not be awaken when events come on few tracers. Cc: Steven Rostedt Cc: Arnaldo Carvalho de Melo Signed-off-by: Frederic Weisbecker --- kernel/trace/trace.c | 2 ++ kernel/trace/trace_branch.c | 2 ++ kernel/trace/trace_hw_branches.c | 2 ++ 3 files changed, 6 insertions(+), 0 deletions(-) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index e1f3b99..7f450b6 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -3055,6 +3055,8 @@ int trace_vprintk(unsigned long ip, int depth, const char *fmt, va_list args) out: preempt_enable_notrace(); + trace_wake_up(); + return len; } EXPORT_SYMBOL_GPL(trace_vprintk); diff --git a/kernel/trace/trace_branch.c b/kernel/trace/trace_branch.c index c2e68d4..8c8f8c0 100644 --- a/kernel/trace/trace_branch.c +++ b/kernel/trace/trace_branch.c @@ -78,6 +78,8 @@ probe_likely_condition(struct ftrace_branch_data *f, int val, int expect) out: atomic_dec(&tr->data[cpu]->disabled); local_irq_restore(flags); + + trace_wake_up(); } static inline diff --git a/kernel/trace/trace_hw_branches.c b/kernel/trace/trace_hw_branches.c index 3561aac..ddd87fd 100644 --- a/kernel/trace/trace_hw_branches.c +++ b/kernel/trace/trace_hw_branches.c @@ -202,6 +202,8 @@ void trace_hw_branch(u64 from, u64 to) out: atomic_dec(&tr->data[cpu]->disabled); local_irq_restore(irq1); + + trace_wake_up(); } static void trace_bts_at(const struct bts_trace *trace, void *at) -- 1.6.1