diff options
Diffstat (limited to 'arch/arm/include/asm/uaccess.h')
| -rw-r--r-- | arch/arm/include/asm/uaccess.h | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/arch/arm/include/asm/uaccess.h b/arch/arm/include/asm/uaccess.h index 98c6b91be4a8..a13d90206472 100644 --- a/arch/arm/include/asm/uaccess.h +++ b/arch/arm/include/asm/uaccess.h @@ -76,9 +76,13 @@ static inline void set_fs(mm_segment_t fs) modify_domain(DOMAIN_KERNEL, fs ? DOMAIN_CLIENT : DOMAIN_MANAGER); } -#define segment_eq(a, b) ((a) == (b)) +#define uaccess_kernel() (get_fs() == KERNEL_DS) -/* We use 33-bit arithmetic here... */ +/* + * We use 33-bit arithmetic here. Success returns zero, failure returns + * addr_limit. We take advantage that addr_limit will be zero for KERNEL_DS, + * so this will always return success in that case. + */ #define __range_ok(addr, size) ({ \ unsigned long flag, roksum; \ __chk_user_ptr(addr); \ @@ -263,7 +267,7 @@ extern int __put_user_8(void *, unsigned long long); */ #define USER_DS KERNEL_DS -#define segment_eq(a, b) (1) +#define uaccess_kernel() (true) #define __addr_ok(addr) ((void)(addr), 1) #define __range_ok(addr, size) ((void)(addr), 0) #define get_fs() (KERNEL_DS) |