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Commit 07f78b30 authored by Al Viro's avatar Al Viro
Browse files

cris: don't rely upon __copy_user_zeroing() zeroing the tail 



we want to get rid of it; unfortunately, it's tangled as hell, so
it'll take many steps, more's the pity.

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent a8be3445

arch/cris/include/asm/uaccess.h

+9 −7
Original line number Diff line number Diff line
@@ -338,14 +338,16 @@ static inline size_t clear_user(void __user *to, size_t n) 


static inline size_t copy_from_user(void *to, const void __user *from, size_t n)

{

	if (unlikely(!access_ok(VERIFY_READ, from, n))) {

		memset(to, 0, n);

		return n;

	}

	size_t res = n;

	if (likely(access_ok(VERIFY_READ, from, n))) {

		if (__builtin_constant_p(n))

		return __constant_copy_from_user(to, from, n);

			res = __constant_copy_from_user(to, from, n);

		else

		return __copy_user_zeroing(to, from, n);

			res = __copy_user_zeroing(to, from, n);

	}

	if (unlikely(res))

		memset(to + n - res , 0, res);

	return res;

}



static inline size_t copy_to_user(void __user *to, const void *from, size_t n)