linux-kernel - Re: [PATCH 3/4] ptrace: remove PT

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Message-ID: <m2tz4e5psn.fsf@igel.home>
Date:	Fri, 24 Apr 2009 12:06:32 +0200
From:	Andreas Schwab <schwab@...ux-m68k.org>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Roland McGrath <roland@...hat.com>,
	Chris Zankel <chris@...kel.net>,
	David Howells <dhowells@...hat.com>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Greg Ungerer <gerg@...inux.org>,
	Haavard Skinnemoen <hskinnemoen@...el.com>,
	Helge Deller <deller@....de>,
	Hirokazu Takata <takata@...ux-m32r.org>,
	Jeff Dike <jdike@...toit.com>,
	Kyle McMartin <kyle@...artin.ca>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Mike Frysinger <vapier.adi@...il.com>,
	Paul Mundt <lethal@...ux-sh.org>,
	Roman Zippel <zippel@...ux-m68k.org>,
	Yoshinori Sato <ysato@...rs.sourceforge.jp>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/4] ptrace: remove PT_DTRACE from m68k, m68knommu

Oleg Nesterov <oleg@...hat.com> writes:

> m68k sets PT_DTRACE in trap_c() but never uses it.
>
> Signed-off-by: Oleg Nesterov <oleg@...hat.com>
>
>  arch/m68k/kernel/traps.c            |    1 -
>  arch/m68knommu/kernel/asm-offsets.c |    1 -
>  arch/m68knommu/kernel/traps.c       |    1 -
>  3 files changed, 3 deletions(-)
>
> --- PTRACE/arch/m68k/kernel/traps.c~DT_3_SET	2009-04-06 00:03:35.000000000 +0200
> +++ PTRACE/arch/m68k/kernel/traps.c	2009-04-22 21:52:23.000000000 +0200
> @@ -1057,7 +1057,6 @@ asmlinkage void trap_c(struct frame *fp)
>  	if (fp->ptregs.sr & PS_S) {
>  		if ((fp->ptregs.vector >> 2) == VEC_TRACE) {
>  			/* traced a trapping instruction */
> -			current->ptrace |= PT_DTRACE;

This is supposed to be setting the TIF_DELAYED_TRACE thread flag.

Andreas.

-- 
Andreas Schwab, schwab@...ux-m68k.org
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