m68k: Use BUILD_BUG for passing invalid sizes to get_user/put_user

Simplify the handling a bit by using the common helper instead of
referencing undefined symbols.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Michael Schmitz <schmitzmic@gmail.com>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Link: https://lore.kernel.org/r/20210916070405.52750-4-hch@lst.de
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

diff --git a/arch/m68k/include/asm/uaccess.h b/arch/m68k/include/asm/uaccess.h
index 610bfe8..01334a9 100644 (file)
--- a/arch/m68k/include/asm/uaccess.h
+++ b/arch/m68k/include/asm/uaccess.h
@@ -39,9 +39,6 @@ static inline int access_ok(const void __user *addr,
 #define        MOVES   "move"
 #endif
 
-extern int __put_user_bad(void);
-extern int __get_user_bad(void);
-
 #define __put_user_asm(res, x, ptr, bwl, reg, err)     \
 asm volatile ("\n"                                     \
        "1:     "MOVES"."#bwl"  %2,%1\n"                \
@@ -105,8 +102,7 @@ asm volatile ("\n"                                  \
                break;                                                  \
            }                                                           \
        default:                                                        \
-               __pu_err = __put_user_bad();                            \
-               break;                                                  \
+               BUILD_BUG();                                            \
        }                                                               \
        __pu_err;                                                       \
 })
@@ -179,8 +175,7 @@ asm volatile ("\n"                                  \
                break;                                                  \
        }                                                               \
        default:                                                        \
-               __gu_err = __get_user_bad();                            \
-               break;                                                  \
+               BUILD_BUG();                                            \
        }                                                               \
        __gu_err;                                                       \
 })