diff options
Diffstat (limited to 'arch/parisc')
| -rw-r--r-- | arch/parisc/include/asm/uaccess.h | 46 |
1 files changed, 4 insertions, 42 deletions
diff --git a/arch/parisc/include/asm/uaccess.h b/arch/parisc/include/asm/uaccess.h index 63f4dd0b49c2..4006964d8e12 100644 --- a/arch/parisc/include/asm/uaccess.h +++ b/arch/parisc/include/asm/uaccess.h @@ -4,14 +4,11 @@ /* * User space memory access functions */ -#include <asm/processor.h> #include <asm/page.h> #include <asm/cache.h> #include <asm/errno.h> #include <asm-generic/uaccess-unaligned.h> -#include <linux/sched.h> - #define VERIFY_READ 0 #define VERIFY_WRITE 1 @@ -36,43 +33,12 @@ extern int __get_user_bad(void); extern int __put_kernel_bad(void); extern int __put_user_bad(void); - -/* - * Test whether a block of memory is a valid user space address. - * Returns 0 if the range is valid, nonzero otherwise. - */ -static inline int __range_not_ok(unsigned long addr, unsigned long size, - unsigned long limit) +static inline long access_ok(int type, const void __user * addr, + unsigned long size) { - unsigned long __newaddr = addr + size; - return (__newaddr < addr || __newaddr > limit || size > limit); + return 1; } -/** - * access_ok: - Checks if a user space pointer is valid - * @type: Type of access: %VERIFY_READ or %VERIFY_WRITE. Note that - * %VERIFY_WRITE is a superset of %VERIFY_READ - if it is safe - * to write to a block, it is always safe to read from it. - * @addr: User space pointer to start of block to check - * @size: Size of block to check - * - * Context: User context only. This function may sleep. - * - * Checks if a pointer to a block of memory in user space is valid. - * - * Returns true (nonzero) if the memory block may be valid, false (zero) - * if it is definitely invalid. - * - * Note that, depending on architecture, this function probably just - * checks that the pointer is in the user space range - after calling - * this function, memory access functions may still return -EFAULT. - */ -#define access_ok(type, addr, size) \ -( __chk_user_ptr(addr), \ - !__range_not_ok((unsigned long) (__force void *) (addr), \ - size, user_addr_max()) \ -) - #define put_user __put_user #define get_user __get_user @@ -253,11 +219,7 @@ extern long lstrnlen_user(const char __user *,long); /* * Complex access routines -- macros */ -#ifdef CONFIG_COMPAT -#define user_addr_max() (TASK_SIZE) -#else -#define user_addr_max() (DEFAULT_TASK_SIZE) -#endif +#define user_addr_max() (~0UL) #define strnlen_user lstrnlen_user #define strlen_user(str) lstrnlen_user(str, 0x7fffffffL) |