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-rw-r--r--arch/arm/include/asm/uaccess.h87
1 files changed, 16 insertions, 71 deletions
diff --git a/arch/arm/include/asm/uaccess.h b/arch/arm/include/asm/uaccess.h
index b7e0125c0bbf..2577405d082d 100644
--- a/arch/arm/include/asm/uaccess.h
+++ b/arch/arm/include/asm/uaccess.h
@@ -12,8 +12,6 @@
* User space memory access functions
*/
#include <linux/string.h>
-#include <linux/thread_info.h>
-#include <asm/errno.h>
#include <asm/memory.h>
#include <asm/domain.h>
#include <asm/unified.h>
@@ -26,28 +24,7 @@
#define __put_user_unaligned __put_user
#endif
-#define VERIFY_READ 0
-#define VERIFY_WRITE 1
-
-/*
- * 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
- * the address at which the program should continue. No registers are
- * modified, so it is entirely up to the continuation code to figure out
- * what to do.
- *
- * All the routines below use bits of fixup code that are out of line
- * with the main instruction path. This means when everything is well,
- * we don't even have to jump over them. Further, they do not intrude
- * on our cache or tlb entries.
- */
-
-struct exception_table_entry
-{
- unsigned long insn, fixup;
-};
-
-extern int fixup_exception(struct pt_regs *regs);
+#include <asm/extable.h>
/*
* These two functions allow hooking accesses to userspace to increase
@@ -271,7 +248,7 @@ static inline void set_fs(mm_segment_t fs)
#define access_ok(type, addr, size) (__range_ok(addr, size) == 0)
#define user_addr_max() \
- (segment_eq(get_fs(), KERNEL_DS) ? ~0UL : get_fs())
+ (uaccess_kernel() ? ~0UL : get_fs())
/*
* The "__xxx" versions of the user access functions do not verify the
@@ -478,7 +455,7 @@ extern unsigned long __must_check
arm_copy_from_user(void *to, const void __user *from, unsigned long n);
static inline unsigned long __must_check
-__arch_copy_from_user(void *to, const void __user *from, unsigned long n)
+raw_copy_from_user(void *to, const void __user *from, unsigned long n)
{
unsigned int __ua_flags;
@@ -494,7 +471,7 @@ extern unsigned long __must_check
__copy_to_user_std(void __user *to, const void *from, unsigned long n);
static inline unsigned long __must_check
-__arch_copy_to_user(void __user *to, const void *from, unsigned long n)
+raw_copy_to_user(void __user *to, const void *from, unsigned long n)
{
#ifndef CONFIG_UACCESS_WITH_MEMCPY
unsigned int __ua_flags;
@@ -522,54 +499,22 @@ __clear_user(void __user *addr, unsigned long n)
}
#else
-#define __arch_copy_from_user(to, from, n) \
- (memcpy(to, (void __force *)from, n), 0)
-#define __arch_copy_to_user(to, from, n) \
- (memcpy((void __force *)to, from, n), 0)
-#define __clear_user(addr, n) (memset((void __force *)addr, 0, n), 0)
-#endif
-
-static inline unsigned long __must_check
-__copy_from_user(void *to, const void __user *from, unsigned long n)
-{
- check_object_size(to, n, false);
- return __arch_copy_from_user(to, from, n);
-}
-
-static inline unsigned long __must_check
-copy_from_user(void *to, const void __user *from, unsigned long n)
-{
- unsigned long res = n;
-
- check_object_size(to, n, false);
-
- if (likely(access_ok(VERIFY_READ, from, n)))
- res = __arch_copy_from_user(to, from, n);
- if (unlikely(res))
- memset(to + (n - res), 0, res);
- return res;
-}
-
-static inline unsigned long __must_check
-__copy_to_user(void __user *to, const void *from, unsigned long n)
+static inline unsigned long
+raw_copy_from_user(void *to, const void __user *from, unsigned long n)
{
- check_object_size(from, n, true);
-
- return __arch_copy_to_user(to, from, n);
+ memcpy(to, (const void __force *)from, n);
+ return 0;
}
-
-static inline unsigned long __must_check
-copy_to_user(void __user *to, const void *from, unsigned long n)
+static inline unsigned long
+raw_copy_to_user(void __user *to, const void *from, unsigned long n)
{
- check_object_size(from, n, true);
-
- if (access_ok(VERIFY_WRITE, to, n))
- n = __arch_copy_to_user(to, from, n);
- return n;
+ memcpy((void __force *)to, from, n);
+ return 0;
}
-
-#define __copy_to_user_inatomic __copy_to_user
-#define __copy_from_user_inatomic __copy_from_user
+#define __clear_user(addr, n) (memset((void __force *)addr, 0, n), 0)
+#endif
+#define INLINE_COPY_TO_USER
+#define INLINE_COPY_FROM_USER
static inline unsigned long __must_check clear_user(void __user *to, unsigned long n)
{