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authorGeert Uytterhoeven <geert@linux-m68k.org>2013-04-14 22:17:20 +0200
committerGeert Uytterhoeven <geert@linux-m68k.org>2013-06-24 19:44:18 +0200
commitd346a5db02fc16263b44eb511fcb260265e3ef77 (patch)
tree063226819b893487e4d9026ff6623490a2ea1c67
parent9e895ace5d82df8929b16f58e9f515f6d54ab82d (diff)
downloadop-kernel-dev-d346a5db02fc16263b44eb511fcb260265e3ef77.zip
op-kernel-dev-d346a5db02fc16263b44eb511fcb260265e3ef77.tar.gz
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>
-rw-r--r--arch/m68k/include/asm/string.h32
-rw-r--r--arch/m68k/lib/Makefile2
-rw-r--r--arch/m68k/lib/string.c22
3 files changed, 1 insertions, 55 deletions
diff --git a/arch/m68k/include/asm/string.h b/arch/m68k/include/asm/string.h
index 9aea9f1..c30c03d 100644
--- a/arch/m68k/include/asm/string.h
+++ b/arch/m68k/include/asm/string.h
@@ -4,20 +4,6 @@
#include <linux/types.h>
#include <linux/compiler.h>
-static inline char *__kernel_strcpy(char *dest, const char *src)
-{
- char *xdest = dest;
-
- asm volatile ("\n"
- "1: move.b (%1)+,(%0)+\n"
- " jne 1b"
- : "+a" (dest), "+a" (src)
- : : "memory");
- return xdest;
-}
-
-#ifndef __IN_STRING_C
-
#define __HAVE_ARCH_STRNLEN
static inline size_t strnlen(const char *s, size_t count)
{
@@ -34,16 +20,6 @@ static inline size_t strnlen(const char *s, size_t count)
return sc - s;
}
-#define __HAVE_ARCH_STRCPY
-#if __GNUC__ >= 4
-#define strcpy(d, s) (__builtin_constant_p(s) && \
- __builtin_strlen(s) <= 32 ? \
- __builtin_strcpy(d, s) : \
- __kernel_strcpy(d, s))
-#else
-#define strcpy(d, s) __kernel_strcpy(d, s)
-#endif
-
#define __HAVE_ARCH_STRNCPY
static inline char *strncpy(char *dest, const char *src, size_t n)
{
@@ -61,12 +37,6 @@ static inline char *strncpy(char *dest, const char *src, size_t n)
return xdest;
}
-#define __HAVE_ARCH_STRCAT
-#define strcat(d, s) ({ \
- char *__d = (d); \
- strcpy(__d + strlen(__d), (s)); \
-})
-
#ifndef CONFIG_COLDFIRE
#define __HAVE_ARCH_STRCMP
static inline int strcmp(const char *cs, const char *ct)
@@ -100,6 +70,4 @@ extern void *memset(void *, int, __kernel_size_t);
extern void *memcpy(void *, const void *, __kernel_size_t);
#define memcpy(d, s, n) __builtin_memcpy(d, s, n)
-#endif
-
#endif /* _M68K_STRING_H_ */
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);
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