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new helper: uaccess_kernel()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2017-03-20 21:08:07 -04:00
parent aaa2e7ac80
commit db68ce10c4
32 changed files with 44 additions and 42 deletions
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2
arch/sparc/include/asm/uaccess.h
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@ -7,7 +7,7 @@
#endif
#define user_addr_max() \
(segment_eq(get_fs(), USER_DS) ? TASK_SIZE : ~0UL)
(uaccess_kernel() ? ~0UL : TASK_SIZE)
long strncpy_from_user(char *dest, const char __user *src, long count);

2
arch/sparc/include/asm/uaccess_32.h
View file

@ -36,7 +36,7 @@
* large size and address near to PAGE_OFFSET - a fault will break his intentions.
*/
#define __user_ok(addr, size) ({ (void)(size); (addr) < STACK_TOP; })
#define __kernel_ok (segment_eq(get_fs(), KERNEL_DS))
#define __kernel_ok (uaccess_kernel())
#define __access_ok(addr, size) (__user_ok((addr) & get_fs().seg, (size)))
#define access_ok(type, addr, size) \
({ (void)(type); __access_ok((unsigned long)(addr), size); })