瀏覽代碼

[PATCH] m68knommu: fix result type in get_user() macro

Keep the result holder variable the same type as the quantity we are
retreiving in the get_user() macro - don't go through a pointer version
of the user space address type.

Using the address type causes problems if the address type was const
(newer versions of gcc quite rightly error out for that condition).

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Greg Ungerer 19 年之前
父節點
當前提交
1b0f06d0b4
共有 1 個文件被更改,包括 6 次插入6 次删除
  1. 6 6
      include/asm-m68knommu/uaccess.h

+ 6 - 6
include/asm-m68knommu/uaccess.h

@@ -93,7 +93,7 @@ extern int __put_user_bad(void);
 #define get_user(x, ptr)					\
 ({								\
     int __gu_err = 0;						\
-    typeof(*(ptr)) __gu_val = 0;				\
+    typeof(x) __gu_val = 0;					\
     switch (sizeof(*(ptr))) {					\
     case 1:							\
 	__get_user_asm(__gu_err, __gu_val, ptr, b, "=d");	\
@@ -105,23 +105,23 @@ extern int __put_user_bad(void);
 	__get_user_asm(__gu_err, __gu_val, ptr, l, "=r");	\
 	break;							\
     case 8:							\
-	memcpy(&__gu_val, ptr, sizeof (*(ptr))); \
+	memcpy((void *) &__gu_val, ptr, sizeof (*(ptr)));	\
 	break;							\
     default:							\
 	__gu_val = 0;						\
 	__gu_err = __get_user_bad();				\
 	break;							\
     }								\
-    (x) = __gu_val;						\
+    (x) = (typeof(*(ptr))) __gu_val;				\
     __gu_err;							\
 })
 #define __get_user(x, ptr) get_user(x, ptr)
 
 extern int __get_user_bad(void);
 
-#define __get_user_asm(err,x,ptr,bwl,reg)	\
-	__asm__ ("move" #bwl " %1,%0"			\
-		 : "=d" (x)							\
+#define __get_user_asm(err,x,ptr,bwl,reg)			\
+	__asm__ ("move" #bwl " %1,%0"				\
+		 : "=d" (x)					\
 		 : "m" (*__ptr(ptr)))
 
 #define copy_from_user(to, from, n)		(memcpy(to, from, n), 0)