On Tuesday 20 November 2012, [email protected] wrote:
> +#ifndef __get_user_fn
> static inline int __get_user_fn(size_t size, const void __user *ptr, void *x)
> {
> size = __copy_from_user(x, ptr, size);
> return size ? -EFAULT : size;
> }
>
> +#define __get_user_fn(sz, u, k) __get_user_fn(sz, u, k)
> +
> +#endif
This is ok as well. The idea with the asm-generic __copy_from_user()
implementation is to separate out the cases where you have just
a few bytes and handle them efficiently inline. If you don't want
to do that for some reason, overriding __get_user_fn works
as well. The resulting object code should be the same.
Arnd
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