alpha: switch to RAW_COPY_USER (ec022681) · Commits · 戴 / test

arch/alpha/Kconfig

+1 −0

Original line number	Diff line number	Diff line
		@@ -26,6 +26,7 @@ config ALPHA
		select ODD_RT_SIGACTION
		select OLD_SIGSUSPEND
		select CPU_NO_EFFICIENT_FFS if !ALPHA_EV67
		select ARCH_HAS_RAW_COPY_USER
		help
		The Alpha is a 64-bit general-purpose processor designed and
		marketed by the Digital Equipment Corporation of blessed memory,

+6 −27

Original line number	Diff line number	Diff line
		@@ -300,37 +300,16 @@ __asm__ __volatile__("1: stb %r2,%1\n" \

		extern long __copy_user(void to, const void from, long len);

		#define __copy_to_user(to, from, n) \
		({ \
		__chk_user_ptr(to); \
		__copy_user((__force void *)(to), (from), (n)); \
		})
		#define __copy_from_user(to, from, n) \
		({ \
		__chk_user_ptr(from); \
		__copy_user((to), (__force void *)(from), (n)); \
		})

		#define __copy_to_user_inatomic __copy_to_user
		#define __copy_from_user_inatomic __copy_from_user

		extern inline long
		copy_to_user(void __user to, const void from, long n)
		static inline unsigned long
		raw_copy_from_user(void to, const void __user from, unsigned long len)
		{
		if (likely(__access_ok((unsigned long)to, n)))
		n = __copy_user((__force void *)to, from, n);
		return n;
		return __copy_user(to, (__force const void *)from, len);
		}

		extern inline long
		copy_from_user(void to, const void __user from, long n)
		static inline unsigned long
		raw_copy_to_user(void __user to, const void from, unsigned long len)
		{
		long res = n;
		if (likely(__access_ok((unsigned long)from, n)))
		res = __copy_from_user_inatomic(to, from, n);
		if (unlikely(res))
		memset(to + (n - res), 0, res);
		return res;
		return __copy_user((__force void *)to, from, len);
		}

		extern long __clear_user(void __user *to, long len);