linux-kernel - Re: [PATCH 2/5] sparc32: make show_stack() acquire %fp if @

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Date:	Fri, 29 Mar 2013 23:29:31 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	tj@...nel.org
Cc:	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org, mingo@...hat.com, x86@...nel.org,
	rth@...ddle.net, linux@....linux.org.uk, msalter@...hat.com,
	starvik@...s.com, dhowells@...hat.com, tony.luck@...el.com,
	benh@...nel.crashing.org, takata@...ux-m32r.org,
	geert@...ux-m68k.org, james.hogan@...tec.com, monstr@...str.eu,
	ralf@...ux-mips.org, jonas@...thpole.se, rkuo@...eaurora.org,
	schwidefsky@...ibm.com, liqin.chen@...plusct.com,
	lethal@...ux-sh.org, vgupta@...opsys.com, chris@...kel.net,
	cmetcalf@...era.com, ysato@...rs.sourceforge.jp,
	gxt@...c.pku.edu.cn, jdike@...toit.com
Subject: Re: [PATCH 2/5] sparc32: make show_stack() acquire %fp if @_ksp is
 not specified

From: Tejun Heo <tj@...nel.org>
Date: Fri, 29 Mar 2013 19:27:05 -0700

> show_stack(current or NULL, NULL) is used by arch-independent code to
> dump backtrace of the current task; however, sparc32 show_stack()
> doesn't implement it and wouldn't print any backtrace when NULL @_ksp
> is specfied.
> 
> Make show_stack() acquire and use %fp if @tsk is NULL or current and
> @_ksp is NULL.  This makes %fp fetching in dump_stack() unnecessary.
> Make it use NULL for @_ksp instead.
> 
> Only compile tested.
> 
> Signed-off-by: Tejun Heo <tj@...nel.org>

Acked-by: David S. Miller <davem@...emloft.net>
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