m68k: Remove inline strcpy() and strcat() implementations

Gcc may replace calls to standard string functions by open code and/or
calls to other standard string functions. If the replacement function is
not available out-of-line, link errors will happen.

To avoid this, the out-of-line versions were provided by
arch/m68k/lib/string.c, but they were usually not linked in anymore as
typically none of its symbols are referenced by built-in code.
However, if any module would need them, they would not be available.

Hence remove the inline strcpy() and strcat() implementations, remove
arch/m68k/lib/string.c, and let the generic string library code handle it.

Impact on a typical kernel build seems minimal or nonexistent:

-      .text : 0x00001000 - 0x002aac74   (2728 KiB)
-      .data : 0x002ada48 - 0x00392148   ( 914 KiB)
+      .text : 0x00001000 - 0x002aacf4   (2728 KiB)
+      .data : 0x002adac8 - 0x00392148   ( 914 KiB)

See also commit e00c73ee05dc38ecaccced55d4f5fc58b0b769f7 ("m68k: Remove
inline strlen() implementation").

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

2 files changed, 1 insertions, 23 deletions

diff --git a/arch/m68k/lib/Makefile b/arch/m68k/lib/Makefile
index a9d782d..fcd8eb1 100644
--- a/arch/m68k/lib/Makefile
+++ b/arch/m68k/lib/Makefile
@@ -6,7 +6,7 @@
 lib-y	:= ashldi3.o ashrdi3.o lshrdi3.o muldi3.o \
 	   memcpy.o memset.o memmove.o
 
-lib-$(CONFIG_MMU) += string.o uaccess.o
+lib-$(CONFIG_MMU) += uaccess.o
 lib-$(CONFIG_CPU_HAS_NO_MULDIV64) += mulsi3.o divsi3.o udivsi3.o
 lib-$(CONFIG_CPU_HAS_NO_MULDIV64) += modsi3.o umodsi3.o
 
diff --git a/arch/m68k/lib/string.c b/arch/m68k/lib/string.c
deleted file mode 100644
index 4d61fa8..0000000
--- a/arch/m68k/lib/string.c
+++ /dev/null
@@ -1,22 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file COPYING in the main directory of this archive
- * for more details.
- */
-
-#define __IN_STRING_C
-
-#include <linux/module.h>
-#include <linux/string.h>
-
-char *strcpy(char *dest, const char *src)
-{
-	return __kernel_strcpy(dest, src);
-}
-EXPORT_SYMBOL(strcpy);
-
-char *strcat(char *dest, const char *src)
-{
-	return __kernel_strcpy(dest + strlen(dest), src);
-}
-EXPORT_SYMBOL(strcat);