linux-kernel - Re: [PATCH 17/27] add generic lib/checksum.c

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Message-ID: <20090501092027.GA29366@flint.arm.linux.org.uk>
Date:	Fri, 1 May 2009 10:20:27 +0100
From:	Russell King <rmk+lkml@....linux.org.uk>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	linux-arch@...r.kernel.org, Michal Simek <monstr@...str.eu>,
	Remis Lima Baima <remis.developer@...glemail.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 17/27] add generic lib/checksum.c

On Tue, Mar 31, 2009 at 03:30:31PM +0200, Arnd Bergmann wrote:
> +/*
> + * copy from fs while checksumming, otherwise like csum_partial
> + */
> +__wsum
> +csum_partial_copy_from_user(const void __user *src, void *dst, int len,
> +						__wsum sum, int *csum_err)
> +{
> +	if (csum_err)
> +		*csum_err = 0;
> +	memcpy(dst, src, len);

Since when has 'memcpy' been valid from user addresses?

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:
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