Arnd Bergmann wrote:
> On Friday 01 May 2009, Russell King wrote:
>> Since when has 'memcpy' been valid from user addresses?
>
> It's an artifact from the microblaze code, I found it after
> submitting the patches when running sparse over it (yes, I
> know I should do these things in a different order).
>
> The s390 version seems to get this right, so I'll use this:
>
> static inline __wsum
> csum_partial_copy_from_user(const void __user *src, void *dst,
> int len, __wsum sum,
> int *err_ptr)
> {
> int missing;
>
> missing = copy_from_user(dst, src, len);
> if (missing) {
> memset(dst + len - missing, 0, missing);
> *err_ptr = -EFAULT;
> }
>
> return csum_partial(dst, len, sum);
> }
>
> On microblaze, the old code was only correct for NOMMU.
Not it wasn't there were address space problem too.
Michal
>
> Thanks,
>
> Arnd <><
--
Michal Simek, Ing. (M.Eng)
w: www.monstr.eu p: +42-0-721842854
--
To unsubscribe from this list: send the line "unsubscribe linux-arch" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
