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

Russell King
2009-05-01T09:20:56Z

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/