asm-generic: add nommu implementations of __{get,put}_kernel_nofault (2d2d2554) · Commits · 戴 / test

Add native implementations of __{get,put}_kernel_nofault using {get,put}_unaligned, just like the {get,put}_user implementations. Signed-off-by:

include/asm-generic/uaccess.h

+16 −0

Original line number	Diff line number	Diff line
		@@ -61,6 +61,22 @@ static inline int __put_user_fn(size_t size, void __user to, void from)
		}
		#define __put_user_fn(sz, u, k) __put_user_fn(sz, u, k)

		#define __get_kernel_nofault(dst, src, type, err_label) \
		do { \
		((type )dst) = get_unaligned((type *)(src)); \
		if (0) /* make sure the label looks used to the compiler */ \
		goto err_label; \
		} while (0)

		#define __put_kernel_nofault(dst, src, type, err_label) \
		do { \
		put_unaligned(((type )src), (type *)(dst)); \
		if (0) /* make sure the label looks used to the compiler */ \
		goto err_label; \
		} while (0)

		#define HAVE_GET_KERNEL_NOFAULT 1

		static inline __must_check unsigned long
		raw_copy_from_user(void to, const void __user from, unsigned long n)
		{