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-rw-r--r--include/asm-generic/uaccess.h58
1 files changed, 57 insertions, 1 deletions
diff --git a/include/asm-generic/uaccess.h b/include/asm-generic/uaccess.h
index b3d2241e03f8..e935318804f8 100644
--- a/include/asm-generic/uaccess.h
+++ b/include/asm-generic/uaccess.h
@@ -9,7 +9,63 @@
*/
#include <linux/string.h>
-#include <asm/segment.h>
+#ifdef CONFIG_UACCESS_MEMCPY
+static inline __must_check unsigned long
+raw_copy_from_user(void *to, const void __user * from, unsigned long n)
+{
+ if (__builtin_constant_p(n)) {
+ switch(n) {
+ case 1:
+ *(u8 *)to = *(u8 __force *)from;
+ return 0;
+ case 2:
+ *(u16 *)to = *(u16 __force *)from;
+ return 0;
+ case 4:
+ *(u32 *)to = *(u32 __force *)from;
+ return 0;
+#ifdef CONFIG_64BIT
+ case 8:
+ *(u64 *)to = *(u64 __force *)from;
+ return 0;
+#endif
+ }
+ }
+
+ memcpy(to, (const void __force *)from, n);
+ return 0;
+}
+
+static inline __must_check unsigned long
+raw_copy_to_user(void __user *to, const void *from, unsigned long n)
+{
+ if (__builtin_constant_p(n)) {
+ switch(n) {
+ case 1:
+ *(u8 __force *)to = *(u8 *)from;
+ return 0;
+ case 2:
+ *(u16 __force *)to = *(u16 *)from;
+ return 0;
+ case 4:
+ *(u32 __force *)to = *(u32 *)from;
+ return 0;
+#ifdef CONFIG_64BIT
+ case 8:
+ *(u64 __force *)to = *(u64 *)from;
+ return 0;
+#endif
+ default:
+ break;
+ }
+ }
+
+ memcpy((void __force *)to, from, n);
+ return 0;
+}
+#define INLINE_COPY_FROM_USER
+#define INLINE_COPY_TO_USER
+#endif /* CONFIG_UACCESS_MEMCPY */
#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })