powerpc: Use generic memcpy code in little endian

We need to fix some endian issues in our memcpy code. For now
just enable the generic memcpy routine for little endian builds.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/arch/powerpc/include/asm/string.h b/arch/powerpc/include/asm/string.h
index e40010a..0dffad6 100644 (file)
--- a/arch/powerpc/include/asm/string.h
+++ b/arch/powerpc/include/asm/string.h
@@ -10,7 +10,9 @@
 #define __HAVE_ARCH_STRNCMP
 #define __HAVE_ARCH_STRCAT
 #define __HAVE_ARCH_MEMSET
+#ifdef __BIG_ENDIAN__
 #define __HAVE_ARCH_MEMCPY
+#endif
 #define __HAVE_ARCH_MEMMOVE
 #define __HAVE_ARCH_MEMCMP
 #define __HAVE_ARCH_MEMCHR
@@ -22,7 +24,9 @@ extern int strcmp(const char *,const char *);
 extern int strncmp(const char *, const char *, __kernel_size_t);
 extern char * strcat(char *, const char *);
 extern void * memset(void *,int,__kernel_size_t);
+#ifdef __BIG_ENDIAN__
 extern void * memcpy(void *,const void *,__kernel_size_t);
+#endif
 extern void * memmove(void *,const void *,__kernel_size_t);
 extern int memcmp(const void *,const void *,__kernel_size_t);
 extern void * memchr(const void *,int,__kernel_size_t);

diff --git a/arch/powerpc/kernel/ppc_ksyms.c b/arch/powerpc/kernel/ppc_ksyms.c
index 3b485c5..60bbeb2 100644 (file)
--- a/arch/powerpc/kernel/ppc_ksyms.c
+++ b/arch/powerpc/kernel/ppc_ksyms.c
@@ -148,7 +148,9 @@ EXPORT_SYMBOL(__ucmpdi2);
 #endif
 long long __bswapdi2(long long);
 EXPORT_SYMBOL(__bswapdi2);
+#ifdef __BIG_ENDIAN__
 EXPORT_SYMBOL(memcpy);
+#endif
 EXPORT_SYMBOL(memset);
 EXPORT_SYMBOL(memmove);
 EXPORT_SYMBOL(memcmp);

diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
index 33ab261..5310132 100644 (file)
--- a/arch/powerpc/lib/Makefile
+++ b/arch/powerpc/lib/Makefile
@@ -15,15 +15,18 @@ obj-$(CONFIG_PPC32) += div64.o copy_32.o
 obj-$(CONFIG_HAS_IOMEM)        += devres.o
 
 obj-$(CONFIG_PPC64)    += copypage_64.o copyuser_64.o \
-                          memcpy_64.o usercopy_64.o mem_64.o string.o \
+                          usercopy_64.o mem_64.o string.o \
                           hweight_64.o \
-                          copyuser_power7.o string_64.o copypage_power7.o \
-                          memcpy_power7.o
+                          copyuser_power7.o string_64.o copypage_power7.o
 ifeq ($(CONFIG_GENERIC_CSUM),)
 obj-y                  += checksum_$(CONFIG_WORD_SIZE).o
 obj-$(CONFIG_PPC64)    += checksum_wrappers_64.o
 endif
 
+ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),)
+obj-$(CONFIG_PPC64)            += memcpy_power7.o memcpy_64.o 
+endif
+
 obj-$(CONFIG_PPC_EMULATE_SSTEP)        += sstep.o ldstfp.o
 
 ifeq ($(CONFIG_PPC64),y)