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Diffstat (limited to 'arch/frv/include/asm/uaccess.h')
-rw-r--r--arch/frv/include/asm/uaccess.h80
1 files changed, 24 insertions, 56 deletions
diff --git a/arch/frv/include/asm/uaccess.h b/arch/frv/include/asm/uaccess.h
index 55b3a69c6c53..e4e33b4cd3ae 100644
--- a/arch/frv/include/asm/uaccess.h
+++ b/arch/frv/include/asm/uaccess.h
@@ -18,6 +18,7 @@
#include <linux/mm.h>
#include <asm/segment.h>
#include <asm/sections.h>
+#include <asm/extable.h>
#define __ptr(x) ((unsigned long __force *)(x))
@@ -59,26 +60,6 @@ static inline int ___range_ok(unsigned long addr, unsigned long size)
#define access_ok(type,addr,size) (__range_ok((void __user *)(addr), (size)) == 0)
#define __access_ok(addr,size) (__range_ok((addr), (size)) == 0)
-/*
- * 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;
-};
-
-/* Returns 0 if exception not found and fixup otherwise. */
-extern unsigned long search_exception_table(unsigned long);
-
/*
* These are the main single-value transfer routines. They automatically
@@ -252,61 +233,50 @@ do { \
/*
*
*/
+
#define ____force(x) (__force void *)(void __user *)(x)
#ifdef CONFIG_MMU
extern long __memset_user(void *dst, unsigned long count);
extern long __memcpy_user(void *dst, const void *src, unsigned long count);
#define __clear_user(dst,count) __memset_user(____force(dst), (count))
-#define __copy_from_user_inatomic(to, from, n) __memcpy_user((to), ____force(from), (n))
-#define __copy_to_user_inatomic(to, from, n) __memcpy_user(____force(to), (from), (n))
#else
#define __clear_user(dst,count) (memset(____force(dst), 0, (count)), 0)
-#define __copy_from_user_inatomic(to, from, n) (memcpy((to), ____force(from), (n)), 0)
-#define __copy_to_user_inatomic(to, from, n) (memcpy(____force(to), (from), (n)), 0)
#endif
-static inline unsigned long __must_check
-clear_user(void __user *to, unsigned long n)
-{
- if (likely(__access_ok(to, n)))
- n = __clear_user(to, n);
- return n;
-}
-
-static inline unsigned long __must_check
-__copy_to_user(void __user *to, const void *from, unsigned long n)
-{
- might_fault();
- return __copy_to_user_inatomic(to, from, n);
-}
-
static inline unsigned long
-__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)
{
- might_fault();
- return __copy_from_user_inatomic(to, from, n);
+#ifdef CONFIG_MMU
+ return __memcpy_user(to, (__force const void *)from, n);
+#else
+ memcpy(to, (__force const void *)from, n);
+ return 0;
+#endif
}
-static inline long copy_from_user(void *to, const void __user *from, unsigned long n)
+static inline unsigned long
+raw_copy_to_user(void __user *to, const void *from, unsigned long n)
{
- unsigned long ret = n;
-
- if (likely(__access_ok(from, n)))
- ret = __copy_from_user(to, from, n);
-
- if (unlikely(ret != 0))
- memset(to + (n - ret), 0, ret);
-
- return ret;
+#ifdef CONFIG_MMU
+ return __memcpy_user((__force void *)to, from, n);
+#else
+ memcpy((__force void *)to, from, n);
+ return 0;
+#endif
}
+#define INLINE_COPY_TO_USER
+#define INLINE_COPY_FROM_USER
-static inline long copy_to_user(void __user *to, const void *from, unsigned long n)
+static inline unsigned long __must_check
+clear_user(void __user *to, unsigned long n)
{
- return likely(__access_ok(to, n)) ? __copy_to_user(to, from, n) : n;
+ if (likely(__access_ok(to, n)))
+ n = __clear_user(to, n);
+ return n;
}
extern long strncpy_from_user(char *dst, const char __user *src, long count);
@@ -314,6 +284,4 @@ extern long strnlen_user(const char __user *src, long count);
#define strlen_user(str) strnlen_user(str, 32767)
-extern unsigned long search_exception_table(unsigned long addr);
-
#endif /* _ASM_UACCESS_H */
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