linux-kernel - Re: [RFC] syscalls, x86: Add __NR

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Message-ID: <20120120090225.GD2786@moon>
Date:	Fri, 20 Jan 2012 13:02:25 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Pavel Emelyanov <xemul@...allels.com>,
	KOSAKI Motohiro <kosaki.motohiro@...il.com>
Cc:	david@...g.hm, Alexey Dobriyan <adobriyan@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrey Vagin <avagin@...nvz.org>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Glauber Costa <glommer@...allels.com>,
	Andi Kleen <andi@...stfloor.org>, Tejun Heo <tj@...nel.org>,
	Matt Helsley <matthltc@...ibm.com>,
	Pekka Enberg <penberg@...nel.org>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Vasiliy Kulikov <segoon@...nwall.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Valdis.Kletnieks@...edu
Subject: Re: [RFC] syscalls, x86: Add __NR_kcmp syscall

On Fri, Jan 20, 2012 at 12:40:08PM +0400, Cyrill Gorcunov wrote:
...
> +
> +static __init int kcmp_cookie_init(void)
> +{
> +	int i, j;
> +
> +	for (i = 0; i < KCMP_TYPES; i++) {
> +		for (j = 0; j < 2; j++) {
> +			get_random_bytes(&cookies[i][j], sizeof(cookies[i][j]));
> +
> +			if (cookies[i][j])
> +				continue;
> +
> +			/*
> +			 * This is impossible case but just to be sure.
> +			 */
> +			cookies_valid = false;
> +			WARN_ONCE(1, "Can't get random bytes for k-pointers\n");
> +		}
> +	}
> +
> +	cookies_valid = true;

darn, this string of course should be on top,
i'll update don't complain on this nit.

> +
> +	return 0;
> +}

	Cyrill
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