From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965391Ab2B1O54 (ORCPT ); Tue, 28 Feb 2012 09:57:56 -0500 Received: from mx1.redhat.com ([209.132.183.28]:53817 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965140Ab2B1O5x (ORCPT ); Tue, 28 Feb 2012 09:57:53 -0500 Date: Tue, 28 Feb 2012 15:57:45 +0100 From: Jiri Olsa To: Mark Brown Cc: Steven Rostedt , Frederic Weisbecker , Ingo Molnar , linux-kernel@vger.kernel.org Subject: Re: [PATCH] trace: Fix build breakage without CONFIG_PERF_EVENTS Message-ID: <20120228145744.GG1694@m.brq.redhat.com> References: <1330426967-17067-1-git-send-email-broonie@opensource.wolfsonmicro.com> <1330427423-25499-1-git-send-email-broonie@opensource.wolfsonmicro.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1330427423-25499-1-git-send-email-broonie@opensource.wolfsonmicro.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Feb 28, 2012 at 11:10:23AM +0000, Mark Brown wrote: > Today's -next fails to build for me: > > CC kernel/trace/trace_export.o > In file included from kernel/trace/trace_export.c:197: kernel/trace/trace_entries.h:58: error: 'perf_ftrace_event_register' undeclared here (not in a function) > make[2]: *** [kernel/trace/trace_export.o] Error 1 > make[1]: *** [kernel/trace] Error 2 > make: *** [kernel] Error 2 > > because as of ced390 (ftrace, perf: Add support to use function > tracepoint in perf) perf_trace_event_register() is declared in trace.h > only if CONFIG_PERF_EVENTS is enabled but I don't have that set. > > Ensure that we always have a definition of perf_trace_event_register() > by providing a definition if CONFIG_PERF_EVENTS is disabled. > > Signed-off-by: Mark Brown > --- > > This one had the build test run all the way... > > kernel/trace/trace.h | 2 ++ > 1 files changed, 2 insertions(+), 0 deletions(-) > > diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h > index 54faec7..2aef24e 100644 > --- a/kernel/trace/trace.h > +++ b/kernel/trace/trace.h > @@ -842,6 +842,8 @@ int perf_ftrace_event_register(struct ftrace_event_call *call, > #else > #define perf_ftrace_event_register NULL > #endif /* CONFIG_FUNCTION_TRACER */ > +#else > +#define perf_ftrace_event_register NULL > #endif /* CONFIG_PERF_EVENTS */ > > #endif /* _LINUX_KERNEL_TRACE_H */ > -- > 1.7.9.1 > ook, this one fixies that for me as well ;) I got your replies mixed in mailbox and thought this one was not actually working.. I also added this bit to get rid of the switch warnings, feel free to use it. thanks, jirka --- diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h index dd478fc..5f3f3be 100644 --- a/include/linux/ftrace_event.h +++ b/include/linux/ftrace_event.h @@ -144,12 +144,14 @@ struct event_filter; enum trace_reg { TRACE_REG_REGISTER, TRACE_REG_UNREGISTER, +#ifdef CONFIG_PERF_EVENTS TRACE_REG_PERF_REGISTER, TRACE_REG_PERF_UNREGISTER, TRACE_REG_PERF_OPEN, TRACE_REG_PERF_CLOSE, TRACE_REG_PERF_ADD, TRACE_REG_PERF_DEL, +#endif }; struct ftrace_event_call;