| // SPDX-License-Identifier: GPL-2.0 | |
| #include <linux/uaccess.h> | |
| /* out-of-line parts */ | |
| #ifndef INLINE_COPY_FROM_USER | |
| unsigned long _copy_from_user(void *to, const void __user *from, unsigned long n) | |
| { | |
| unsigned long res = n; | |
| might_fault(); | |
| if (likely(access_ok(from, n))) { | |
| kasan_check_write(to, n); | |
| res = raw_copy_from_user(to, from, n); | |
| } | |
| if (unlikely(res)) | |
| memset(to + (n - res), 0, res); | |
| return res; | |
| } | |
| EXPORT_SYMBOL(_copy_from_user); | |
| #endif | |
| #ifndef INLINE_COPY_TO_USER | |
| unsigned long _copy_to_user(void __user *to, const void *from, unsigned long n) | |
| { | |
| might_fault(); | |
| if (likely(access_ok(to, n))) { | |
| kasan_check_read(from, n); | |
| n = raw_copy_to_user(to, from, n); | |
| } | |
| return n; | |
| } | |
| EXPORT_SYMBOL(_copy_to_user); | |
| #endif |