linux-master/mm/maccess.c

80 long strncpy_from_kernel_nofault(char *dst, const void *unsafe_addr, long count)
82 	const void *src = unsafe_addr;
86 	if (!copy_from_kernel_nofault_allowed(unsafe_addr, count))
94 	} while (dst[-1] && src - unsafe_addr < count);
98 	return src - unsafe_addr;
164  * @unsafe_addr: Unsafe user address.
177 long strncpy_from_user_nofault(char *dst, const void __user *unsafe_addr,
186 	ret = strncpy_from_user(dst, unsafe_addr, count);
201  * @unsafe_addr: The string to measure.
215 long strnlen_user_nofault(const void __user *unsafe_addr, long count)
220 	ret = strnlen_user(unsafe_addr, count);