diff options
Diffstat (limited to 'arch/riscv/include/asm/uaccess.h')
-rw-r--r-- | arch/riscv/include/asm/uaccess.h | 17 |
1 files changed, 5 insertions, 12 deletions
diff --git a/arch/riscv/include/asm/uaccess.h b/arch/riscv/include/asm/uaccess.h index 8c3e3e3c8be1..fb53a8089e76 100644 --- a/arch/riscv/include/asm/uaccess.h +++ b/arch/riscv/include/asm/uaccess.h @@ -41,7 +41,6 @@ #define KERNEL_DS (~0UL) #define USER_DS (TASK_SIZE) -#define get_ds() (KERNEL_DS) #define get_fs() (current_thread_info()->addr_limit) static inline void set_fs(mm_segment_t fs) @@ -54,14 +53,8 @@ static inline void set_fs(mm_segment_t fs) #define user_addr_max() (get_fs()) -#define VERIFY_READ 0 -#define VERIFY_WRITE 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 * @@ -76,7 +69,7 @@ static inline void set_fs(mm_segment_t fs) * 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) ({ \ +#define access_ok(addr, size) ({ \ __chk_user_ptr(addr); \ likely(__access_ok((unsigned long __force)(addr), (size))); \ }) @@ -258,7 +251,7 @@ do { \ ({ \ const __typeof__(*(ptr)) __user *__p = (ptr); \ might_fault(); \ - access_ok(VERIFY_READ, __p, sizeof(*__p)) ? \ + access_ok(__p, sizeof(*__p)) ? \ __get_user((x), __p) : \ ((x) = 0, -EFAULT); \ }) @@ -307,7 +300,7 @@ do { \ " .balign 4\n" \ "4:\n" \ " li %0, %6\n" \ - " jump 2b, %1\n" \ + " jump 3b, %1\n" \ " .previous\n" \ " .section __ex_table,\"a\"\n" \ " .balign " RISCV_SZPTR "\n" \ @@ -386,7 +379,7 @@ do { \ ({ \ __typeof__(*(ptr)) __user *__p = (ptr); \ might_fault(); \ - access_ok(VERIFY_WRITE, __p, sizeof(*__p)) ? \ + access_ok(__p, sizeof(*__p)) ? \ __put_user((x), __p) : \ -EFAULT; \ }) @@ -421,7 +414,7 @@ static inline unsigned long __must_check clear_user(void __user *to, unsigned long n) { might_fault(); - return access_ok(VERIFY_WRITE, to, n) ? + return access_ok(to, n) ? __clear_user(to, n) : n; } |