xtensa: switch to providing csum_and_copy_from_user()

/*

 *	Note: when you get a NULL pointer exception here this means someone

 *	passed in an incorrect kernel address to one of these functions.

 *

 *	If you use these functions directly please don't forget the access_ok().

 */

static inline

__wsum csum_partial_copy_nocheck(const void *src, void *dst,

	return csum_partial_copy_generic(src, dst, len, sum, NULL, NULL);

}

#define _HAVE_ARCH_COPY_AND_CSUM_FROM_USER

static inline

__wsum csum_partial_copy_from_user(const void __user *src, void *dst,

__wsum csum_and_copy_from_user(const void __user *src, void *dst,

				   int len, __wsum sum, int *err_ptr)

{

	if (access_ok(dst, len))

		return csum_partial_copy_generic((__force const void *)src, dst,

					len, sum, err_ptr, NULL);

	if (len)

		*err_ptr = -EFAULT;

	return sum;

}

/*