linux-kernel - Re: [PATCH 2/2] ftrace/x86/extable: Add is_ftrace

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Message-ID: <20141119083622.432a234b@gandalf.local.home>
Date:	Wed, 19 Nov 2014 08:36:22 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, williams@...hat.com,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Ingo Molnar <mingo@...hat.com>
Subject: Re: [PATCH 2/2] ftrace/x86/extable: Add is_ftrace_trampoline()
 function


> 
> [SNIP]
> > @@ -102,6 +103,8 @@ int __kernel_text_address(unsigned long addr)
> >  		return 1;
> >  	if (is_module_text_address(addr))
> >  		return 1;
> > +	if (is_ftrace_trampoline(addr))
> > +		return 1;
> 
> What about kernel_text_address()?  It seems some archs like ARM use it
> instead of __kernel_text_address() although trampoline is only enabled
> on x86 for now.
> 

Good question. I just did this to get x86 working. But as we add
trampolines to other archs, we probably should add it to that too.

-- Steve
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