linux-kernel - Re: [patch 2/4] [RFC] syscalls, x86: Add __NR

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20120124140011.60b6488c.akpm@linux-foundation.org>
Date:	Tue, 24 Jan 2012 14:00:11 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Cyrill Gorcunov <gorcunov@...il.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	KOSAKI Motohiro <kosaki.motohiro@...il.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	linux-kernel@...r.kernel.org,
	Pavel Emelyanov <xemul@...allels.com>,
	Serge Hallyn <serge.hallyn@...onical.com>,
	Kees Cook <keescook@...omium.org>, Tejun Heo <tj@...nel.org>,
	Andrew Vagin <avagin@...nvz.org>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Glauber Costa <glommer@...allels.com>,
	Andi Kleen <andi@...stfloor.org>,
	Matt Helsley <matthltc@...ibm.com>,
	Pekka Enberg <penberg@...nel.org>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Vasiliy Kulikov <segoon@...nwall.com>, Valdis.Kletnieks@...edu
Subject: Re: [patch 2/4] [RFC] syscalls, x86: Add __NR_kcmp syscall v4

On Tue, 24 Jan 2012 13:46:31 -0800
"H. Peter Anvin" <hpa@...or.com> wrote:

> On 01/24/2012 01:45 PM, Andrew Morton wrote:
> > On Tue, 24 Jan 2012 13:22:22 -0800
> > Andrew Morton <akpm@...ux-foundation.org> wrote:
> > 
> >> static int kcmp_task_pointers(void *task1, void *task2, size_t field_offset,
> >> 				enum you_forgot_to_name_the_enum type)
> >> {
> >> 	void **field1 = t1 + field_offset;	/* points to a pointer in the task_struct */
> >> 	void **field2 = t1 + field_offset;
> > 
> > On reflection, this was being too cute.  It would be better to make the
> > function type-safer and just put up with the local typecasts:
> > 
> > static int kcmp_task_pointers(struct task_struct *task1,
> > 			struct task_struct *task2, size_t field_offset,
> > 			enum you_forgot_to_name_the_enum type)
> > {
> > 	void **field1 = (void *)t1 + field_offset;
> > 	void **field2 = (void *)t2 + field_offset;
> > 
> 
> Arithmetic on void pointers?
> 

All the world is gcc!
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/