new helper: uaccess_kernel()

Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Al Viro 2017-03-20 21:08:07 -04:00
commit db68ce10c4
32 changed files with 44 additions and 42 deletions

View file

@ -375,7 +375,7 @@ __constant_copy_to_user(void __user *to, const void *from, unsigned long n)
#define copy_to_user(to, from, n) __copy_to_user(to, from, n)
#define user_addr_max() \
(segment_eq(get_fs(), USER_DS) ? TASK_SIZE : ~0UL)
(uaccess_kernel() ? ~0UL : TASK_SIZE)
extern long strncpy_from_user(char *dst, const char __user *src, long count);
extern __must_check long strlen_user(const char __user *str);