diff options
Diffstat (limited to 'arch/x86/include/asm/uaccess.h')
| -rw-r--r-- | arch/x86/include/asm/uaccess.h | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/x86/include/asm/uaccess.h b/arch/x86/include/asm/uaccess.h index ac96f9b2d64b..79c4869ccdd6 100644 --- a/arch/x86/include/asm/uaccess.h +++ b/arch/x86/include/asm/uaccess.h @@ -16,8 +16,10 @@ * Test whether a block of memory is a valid user space address. * Returns 0 if the range is valid, nonzero otherwise. */ -static inline bool __chk_range_not_ok(unsigned long addr, unsigned long size, unsigned long limit) +static inline bool __chk_range_not_ok(unsigned long addr, unsigned long size) { + unsigned long limit = TASK_SIZE_MAX; + /* * If we have used "sizeof()" for the size, * we know it won't overflow the limit (but @@ -35,10 +37,10 @@ static inline bool __chk_range_not_ok(unsigned long addr, unsigned long size, un return unlikely(addr > limit); } -#define __range_not_ok(addr, size, limit) \ +#define __access_ok(addr, size) \ ({ \ __chk_user_ptr(addr); \ - __chk_range_not_ok((unsigned long __force)(addr), size, limit); \ + !__chk_range_not_ok((unsigned long __force)(addr), size); \ }) #ifdef CONFIG_DEBUG_ATOMIC_SLEEP @@ -69,7 +71,7 @@ static inline bool pagefault_disabled(void); #define access_ok(addr, size) \ ({ \ WARN_ON_IN_IRQ(); \ - likely(!__range_not_ok(addr, size, TASK_SIZE_MAX)); \ + likely(__access_ok(addr, size)); \ }) extern int __get_user_1(void); |