linux-kernel - Re: [PATCH] Audit: push audit success and retcode into arch ptrace.h

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Message-Id: <201106030103.46742.richard@nod.at>
Date:	Fri, 3 Jun 2011 01:03:46 +0200
From:	Richard Weinberger <richard@....at>
To:	Tony Luck <tony.luck@...el.com>
Cc:	Eric Paris <eparis@...hat.com>, linux-kernel@...r.kernel.org,
	fenghua.yu@...el.com, monstr@...str.eu, ralf@...ux-mips.org,
	benh@...nel.crashing.org, paulus@...ba.org, schwidefsky@...ibm.com,
	heiko.carstens@...ibm.com, linux390@...ibm.com,
	lethal@...ux-sh.org, davem@...emloft.net, jdike@...toit.com,
	tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
	x86@...nel.org, viro@...iv.linux.org.uk, oleg@...hat.com,
	akpm@...ux-foundation.org, linux-ia64@...r.kernel.org,
	microblaze-uclinux@...e.uq.edu.au, linux-mips@...ux-mips.org,
	linuxppc-dev@...ts.ozlabs.org, linux-s390@...r.kernel.org,
	linux-sh@...r.kernel.org, sparclinux@...r.kernel.org,
	user-mode-linux-devel@...ts.sourceforge.net
Subject: Re: [PATCH] Audit: push audit success and retcode into arch ptrace.h

Am Freitag 03 Juni 2011, 01:00:51 schrieb Tony Luck:
> > But there seems to be another problem.
> > Why is pt_regs of type void *?
> > 
> > gcc complains:
> > In file included from include/linux/fsnotify.h:15:0,
> >                 from include/linux/security.h:26,
> >                 from init/main.c:32:
> > include/linux/audit.h: In function ‘audit_syscall_exit’:
> > include/linux/audit.h:440:17: warning: dereferencing ‘void *’ pointer
> > include/linux/audit.h:440:3: error: invalid use of void expression
> > include/linux/audit.h:441:21: warning: dereferencing ‘void *’ pointer
> > include/linux/audit.h:441:21: error: void value not ignored as it ought
> > to be
> 
> Perhaps same issue on ia64 - but symptoms are different:

The void * pointer is the problem.
On UML it builds fine when I cast it:
#define regs_return_value(r) UPT_SYSCALL_RET((struct uml_pt_regs *)r)

I'll test it tomorrow in detail, for now I'm too sleepy.

Thanks,
//richard
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