diff options
Diffstat (limited to 'arch/riscv')
| -rw-r--r-- | arch/riscv/include/asm/uaccess.h | 33 | ||||
| -rw-r--r-- | arch/riscv/kernel/perf_callchain.c | 4 |
2 files changed, 3 insertions, 34 deletions
diff --git a/arch/riscv/include/asm/uaccess.h b/arch/riscv/include/asm/uaccess.h index c701a5e57a2b..855450bed9f5 100644 --- a/arch/riscv/include/asm/uaccess.h +++ b/arch/riscv/include/asm/uaccess.h @@ -21,42 +21,13 @@ #include <asm/byteorder.h> #include <asm/extable.h> #include <asm/asm.h> +#include <asm-generic/access_ok.h> #define __enable_user_access() \ __asm__ __volatile__ ("csrs sstatus, %0" : : "r" (SR_SUM) : "memory") #define __disable_user_access() \ __asm__ __volatile__ ("csrc sstatus, %0" : : "r" (SR_SUM) : "memory") -/** - * access_ok: - Checks if a user space pointer is valid - * @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(addr, size) ({ \ - __chk_user_ptr(addr); \ - likely(__access_ok((unsigned long __force)(addr), (size))); \ -}) - -/* - * Ensure that the range [addr, addr+size) is within the process's - * address space - */ -static inline int __access_ok(unsigned long addr, unsigned long size) -{ - return size <= TASK_SIZE && addr <= TASK_SIZE - size; -} - /* * The exception table consists of pairs of addresses: the first is the * address of an instruction that is allowed to fault, and the second is @@ -346,8 +317,6 @@ unsigned long __must_check clear_user(void __user *to, unsigned long n) __clear_user(to, n) : n; } -#define HAVE_GET_KERNEL_NOFAULT - #define __get_kernel_nofault(dst, src, type, err_label) \ do { \ long __kr_err; \ diff --git a/arch/riscv/kernel/perf_callchain.c b/arch/riscv/kernel/perf_callchain.c index 1fc075b8f764..55faa4991b87 100644 --- a/arch/riscv/kernel/perf_callchain.c +++ b/arch/riscv/kernel/perf_callchain.c @@ -15,8 +15,8 @@ static unsigned long user_backtrace(struct perf_callchain_entry_ctx *entry, { struct stackframe buftail; unsigned long ra = 0; - unsigned long *user_frame_tail = - (unsigned long *)(fp - sizeof(struct stackframe)); + unsigned long __user *user_frame_tail = + (unsigned long __user *)(fp - sizeof(struct stackframe)); /* Check accessibility of one struct frame_tail beyond */ if (!access_ok(user_frame_tail, sizeof(buftail))) |