From: "H. Peter Anvin" <hpa@zytor.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@elte.hu>,
Andrew Morton <akpm@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Frederic Weisbecker <fweisbec@gmail.com>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Andi Kleen <andi@firstfloor.org>,
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
Michal Marek <mmarek@suse.cz>
Subject: Re: [RFC][PATCH 2/4] ftrace: Add -mfentry to Makefile on function tracer
Date: Wed, 09 Feb 2011 13:22:03 -0800 [thread overview]
Message-ID: <4D53057B.6020008@zytor.com> (raw)
In-Reply-To: <1297283332.23343.29.camel@gandalf.stny.rr.com>
On 02/09/2011 12:28 PM, Steven Rostedt wrote:
> On Wed, 2011-02-09 at 15:02 -0500, Steven Rostedt wrote:
>
>> ifdef CONFIG_FUNCTION_TRACER
>> -KBUILD_CFLAGS += -pg
>> +ifdef CONFIG_HAVE_FENTRY
>> +CC_HAS_FENTRY := $(call cc-option, -mfentry -DCC_HAS_FENTRY)
>
> I should include a thanks to H. Peter Anvin in the change log for
> telling me about the cc-option trick.
>
Actually we should probably calling this -DCC_USING_FENTRY or something
like that, since as coded above it includes the CONFIG_FUNCTION_TRACER
dependency. This is a good thing -- it makes the conditionals easier --
we just also want to make sure they don't get misunderstood.
-hpa
next prev parent reply other threads:[~2011-02-09 21:23 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-09 20:02 [RFC][PATCH 0/4] ftrace: Use -mfentry when supported (this is for x86_64 right now) Steven Rostedt
2011-02-09 20:02 ` [RFC][PATCH 1/4] ftrace: Make recordmcount.c handle __fentry__ Steven Rostedt
2011-02-09 20:02 ` [RFC][PATCH 2/4] ftrace: Add -mfentry to Makefile on function tracer Steven Rostedt
2011-02-09 20:28 ` Steven Rostedt
2011-02-09 21:22 ` H. Peter Anvin [this message]
2011-02-09 20:02 ` [RFC][PATCH 3/4] ftrace: Do not test frame pointers if -mfentry is used Steven Rostedt
2011-02-09 20:02 ` [RFC][PATCH 4/4] ftrace/x86: Add support for -mfentry to x86_64 Steven Rostedt
2011-02-10 2:38 ` [RFC][PATCH 0/4] ftrace: Use -mfentry when supported (this is for x86_64 right now) Masami Hiramatsu
2011-02-17 12:37 ` Masami Hiramatsu
2011-02-17 13:18 ` Steven Rostedt
2011-02-17 15:34 ` Masami Hiramatsu
2011-02-17 15:46 ` Steven Rostedt
2011-02-17 16:07 ` Masami Hiramatsu
2011-02-17 20:11 ` Steven Rostedt
2011-02-18 11:45 ` Masami Hiramatsu
2011-02-18 15:07 ` Steven Rostedt
2011-02-18 15:19 ` Mathieu Desnoyers
2011-02-18 20:10 ` Dominique Toupin
2011-02-18 20:36 ` Steven Rostedt
2011-02-18 21:45 ` Dominique Toupin
2011-02-18 22:39 ` Andi Kleen
2011-02-18 22:45 ` H. Peter Anvin
2011-02-18 23:02 ` Steven Rostedt
2011-02-19 5:07 ` Masami Hiramatsu
2011-02-19 5:10 ` hpas
2012-08-07 19:38 [RFC PATCH 0/4] ftrace: Add use of -mfentry for x86_64 Steven Rostedt
2012-08-07 19:38 ` [RFC PATCH 2/4] ftrace: Add -mfentry to Makefile on function tracer Steven Rostedt
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