[PATCH 18/39] powerpc: Use generic memcpy code in little endian
From: Anton Blanchard <hidden>
Date: 2013-09-23 02:04:52
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
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 <redacted> --- arch/powerpc/include/asm/string.h | 4 ++++ arch/powerpc/kernel/ppc_ksyms.c | 2 ++ arch/powerpc/lib/Makefile | 9 ++++++--- 3 files changed, 12 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/include/asm/string.h b/arch/powerpc/include/asm/string.h
index e40010a..0dffad6 100644
--- 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
--- 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
--- 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)
--
1.8.1.2