linux-kernel - Re: [PATCH] kernel/trace/trace.c: Switch the related code with CONFIG_TRACER_MAX

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Message-ID: <20151110175645.4f211b21@gandalf.local.home>
Date:	Tue, 10 Nov 2015 17:56:45 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Chen Gang <xili_gchen_5257@...mail.com>
Cc:	"mingo@...hat.com" <mingo@...hat.com>,
	kernel mailing list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] kernel/trace/trace.c: Switch the related code with
 CONFIG_TRACER_MAX_TRACE

On Wed, 11 Nov 2015 06:31:25 +0800
Chen Gang <xili_gchen_5257@...mail.com> wrote:

> > I'm curious to what compiler are you using? Because, for me gcc simply
> > compiles it out without any warning or anything because it's labeled as
> > a constant.
> >   
> 
> I use the upstream gcc 6.0.0, which is simply built by myself:
> 

So this is new with gcc 6.0 (which I don't have). I'm still using 4.9
as that's the last one supported by:

 https://www.kernel.org/pub/tools/crosstool/files/bin/x86_64/

-- Steve

> 
> It will always report warning for both "static const struct file_operations
> tracing_max_lat_fops ..." and  "static struct file_operations
> tracing_max_lat_fops ..."
> 

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