linux-kernel - Re: [PATCH] futex: mark get_robust

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Date:	Fri, 23 Mar 2012 19:27:53 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Kees Cook <keescook@...omium.org>
cc:	linux-kernel@...r.kernel.org, Darren Hart <dvhart@...ux.intel.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jiri Kosina <jkosina@...e.cz>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	David Howells <dhowells@...hat.com>,
	"Serge E. Hallyn" <serge.hallyn@...onical.com>,
	kernel-hardening@...ts.openwall.com, spender@...ecurity.net
Subject: Re: [PATCH] futex: mark get_robust_list as deprecated

On Fri, 23 Mar 2012, Kees Cook wrote:

> Notify get_robust_list users that the syscall is going away.

That want's an entry in Documentation/feature-removal-schedule.txt as
well.

That's on top of your previous one, right ?

Thanks,

	tglx
 
> Suggested-by: Thomas Gleixner <tglx@...utronix.de>
> Signed-off-by: Kees Cook <keescook@...omium.org>
> ---
>  kernel/futex.c        |    2 ++
>  kernel/futex_compat.c |    2 ++
>  2 files changed, 4 insertions(+), 0 deletions(-)
> 
> diff --git a/kernel/futex.c b/kernel/futex.c
> index 439440d..545d7a3 100644
> --- a/kernel/futex.c
> +++ b/kernel/futex.c
> @@ -2449,6 +2449,8 @@ SYSCALL_DEFINE3(get_robust_list, int, pid,
>  	if (!futex_cmpxchg_enabled)
>  		return -ENOSYS;
>  
> +	WARN_ONCE(1, "deprecated: get_robust_list will be deleted in 2013.\n");
> +
>  	rcu_read_lock();
>  
>  	ret = -ESRCH;
> diff --git a/kernel/futex_compat.c b/kernel/futex_compat.c
> index a9642d5..83e368b 100644
> --- a/kernel/futex_compat.c
> +++ b/kernel/futex_compat.c
> @@ -142,6 +142,8 @@ compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
>  	if (!futex_cmpxchg_enabled)
>  		return -ENOSYS;
>  
> +	WARN_ONCE(1, "deprecated: get_robust_list will be deleted in 2013.\n");
> +
>  	rcu_read_lock();
>  
>  	ret = -ESRCH;
> -- 
> 1.7.0.4
> 
> -- 
> Kees Cook
> ChromeOS Security
> 
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