linux-kernel - Re: [PATCH] trace: Fix build breakage without CONFIG_PERF

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Message-ID: <20120228144318.GF1694@m.brq.redhat.com>
Date:	Tue, 28 Feb 2012 15:43:19 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] trace: Fix build breakage without CONFIG_PERF_EVENTS

On Tue, Feb 28, 2012 at 02:03:35PM +0000, Mark Brown wrote:
> On Tue, Feb 28, 2012 at 09:02:09AM -0500, Steven Rostedt wrote:
> > On Tue, 2012-02-28 at 13:37 +0000, Mark Brown wrote:
> 
> > > ARM.  If it was not possible to switch off PERF_EVENTS it shouldn't be a
> > > config option in the code as this is just creating complexity and
> > > potential breakage.
> 
> > It is possible to switch off PERF_EVENTS, just not on x86 :-/
> 
> Well, if you insist on using these restricted architectures :P

reproduced ;) looking for fix..

jirka


[jolsa@m tip]$ make   ARCH=arm CROSS_COMPILE=armv5tel-redhat-linux-gnueabi- uImage 
  CHK     include/linux/version.h
  CHK     include/generated/utsrelease.h
make[1]: `include/generated/mach-types.h' is up to date.
  CALL    scripts/checksyscalls.sh
  CHK     include/generated/compile.h
  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
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