linux-kernel - Re: Fwd: Re: [2.6.24 patch] restore ARMv6 OProfile support

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Message-ID: <20080115191623.GA19694@uranus.ravnborg.org>
Date:	Tue, 15 Jan 2008 20:16:23 +0100
From:	Sam Ravnborg <sam@...nborg.org>
To:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Russell King <rmk+lkml@....linux.org.uk>,
	Adrian Bunk <adrian.bunk@...ial.fi>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Randy Dunlap <randy.dunlap@...cle.com>, phil.el@...adoo.fr,
	oprofile-list@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: Fwd: Re: [2.6.24 patch] restore ARMv6 OProfile support

On Tue, Jan 15, 2008 at 02:07:20PM -0500, Mathieu Desnoyers wrote:
> * Linus Torvalds (torvalds@...ux-foundation.org) wrote:
> > 
> > 
> > On Tue, 15 Jan 2008, Mathieu Desnoyers wrote:
> > > 
> > > Well, it goes along the lines of the patch I suggested as a reply to
> > > Adrian, with these differences :
> > > 
> > > - I still source the kernel/Kconfig.instrumentation file.
> > > - I put back the missing OPROFILE options directly in arch/arm/Kconfig
> > > 
> > > Then end result is the same as your patch, but without the code
> > > duplication.
> > 
> > No it's not.
> > 
> > Now the config variables may all be there, but the UI for the *menu* 
> > system is broken (ie all the ARM profiling config options are now outside 
> > the profiling menu).
> > 
> > Is that menu really needed? I dunno. But since it exists, it should be 
> > correct.
> > 
> > 		Linus
> 
> There is an "instrumentation menu removal" patchset I've submitted to
> Andrew for the next release cycle that moves the instrumentation menu
> content into General setup (I did this following your advice).
> 
> Furthermore, on ARM, the OPROFILE_ARMV6, OPROFILE_MPCORE and
> OPROFILE_ARM11_CORE are all "bool , default y" (equivalent to the
> preferred def_bool y). Unless I am grossly mistaken, this is not
> supposed to show up in the menus; it's just selected when the
> dependencies are met.

This was the patch:
+if OPROFILE
+
+config OPROFILE_ARMV6
+	def_bool y
+	depends on CPU_V6 && !SMP
+	select OPROFILE_ARM11_CORE
+
+config OPROFILE_MPCORE
+	def_bool y
+	depends on CPU_V6 && SMP
+	select OPROFILE_ARM11_CORE
+
+config OPROFILE_ARM11_CORE
+	bool
+
+endif

And none of these has a prompt defined so they do not show up
as a menu.
It is very easy to test if you have the patch applied.
No cross toolchin is needed - just do:
make ARCH=arm menuconfig

	Sam
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