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kernel: fix MIPS memory function optimization build error in decompressor

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Fixes the following build error:
  CC      arch/mips/boot/compressed/decompress.o
  OBJCOPY arch/mips/boot/compressed/vmlinux.bin
  XZKERN  arch/mips/boot/compressed/vmlinux.bin.z
  OBJCOPY arch/mips/boot/compressed/piggy.o
  LD      vmlinuz
arch/mips/boot/compressed/decompress.o: In function `lzma2_lzma':
/tmp2/mehrtens/linux/arch/mips/boot/compressed/../../../../lib/xz/xz_dec_lzma2.c:884: undefined reference to `memmove'
make[1]: *** [vmlinuz] Error 1
make: *** [vmlinuz] Error 2

lib/decompress_unxz.c only defines its own memmove function if there is no
macro with the same name.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2017-02-28 06:53:39 +01:00
parent a29163faab
commit f9da6238e4
1 changed files with 20 additions and 10 deletions
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30
target/linux/generic/patches-4.9/306-mips_mem_functions_performance.patch
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@ -1,9 +1,10 @@
--- a/arch/mips/include/asm/string.h
+++ b/arch/mips/include/asm/string.h
@@ -133,11 +133,44 @@ strncmp(__const__ char *__cs, __const__
@@ -140,4 +140,42 @@ extern void *memcpy(void *__to, __const_
#define __HAVE_ARCH_MEMMOVE
extern void *memmove(void *__dest, __const__ void *__src, size_t __n);
#define __HAVE_ARCH_MEMSET
extern void *memset(void *__s, int __c, size_t __count);
+#ifndef __ZBOOT__
+#define memset(__s, __c, len) \
+({ \
+ size_t __len = (len); \
@ -14,9 +15,7 @@
+ __ret = __builtin_memset((__s), (__c), __len); \
+ __ret; \
+})
#define __HAVE_ARCH_MEMCPY
extern void *memcpy(void *__to, __const__ void *__from, size_t __n);
+
+#define memcpy(dst, src, len) \
+({ \
+ size_t __len = (len); \
@ -27,9 +26,7 @@
+ __ret = __builtin_memcpy((dst), (src), __len); \
+ __ret; \
+})
#define __HAVE_ARCH_MEMMOVE
extern void *memmove(void *__dest, __const__ void *__src, size_t __n);
+
+#define memmove(dst, src, len) \
+({ \
+ size_t __len = (len); \
@ -43,7 +40,8 @@
+
+#define __HAVE_ARCH_MEMCMP
+#define memcmp(src1, src2, len) __builtin_memcmp((src1), (src2), (len))
+#endif
+
#endif /* _ASM_STRING_H */
--- a/arch/mips/lib/Makefile
+++ b/arch/mips/lib/Makefile
@ -81,3 +79,15 @@
+}
+EXPORT_SYMBOL(memcmp);
+
--- a/arch/mips/boot/compressed/Makefile
+++ b/arch/mips/boot/compressed/Makefile
@@ -23,7 +23,8 @@ KBUILD_CFLAGS := $(shell echo $(KBUILD_C
KBUILD_CFLAGS := $(filter-out -fstack-protector, $(KBUILD_CFLAGS))
KBUILD_CFLAGS := $(LINUXINCLUDE) $(KBUILD_CFLAGS) -D__KERNEL__ \
- -DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) -D"VMLINUX_LOAD_ADDRESS_ULL=$(VMLINUX_LOAD_ADDRESS)ull"
+ -DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) -D"VMLINUX_LOAD_ADDRESS_ULL=$(VMLINUX_LOAD_ADDRESS)ull" \
+ -D__ZBOOT__
KBUILD_AFLAGS := $(LINUXINCLUDE) $(KBUILD_AFLAGS) -D__ASSEMBLY__ \
-DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) \