openwrtv4/target/linux/generic/patches-4.9/306-mips_mem_functions_performance.patch
Felix Fietkau f9da6238e4 kernel: fix MIPS memory function optimization build error in decompressor
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>
2017-02-28 20:22:10 +01:00

93 lines
2.6 KiB
Diff

--- a/arch/mips/include/asm/string.h
+++ b/arch/mips/include/asm/string.h
@@ -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);
+#ifndef __ZBOOT__
+#define memset(__s, __c, len) \
+({ \
+ size_t __len = (len); \
+ void *__ret; \
+ if (__builtin_constant_p(len) && __len >= 64) \
+ __ret = memset((__s), (__c), __len); \
+ else \
+ __ret = __builtin_memset((__s), (__c), __len); \
+ __ret; \
+})
+
+#define memcpy(dst, src, len) \
+({ \
+ size_t __len = (len); \
+ void *__ret; \
+ if (__builtin_constant_p(len) && __len >= 64) \
+ __ret = memcpy((dst), (src), __len); \
+ else \
+ __ret = __builtin_memcpy((dst), (src), __len); \
+ __ret; \
+})
+
+#define memmove(dst, src, len) \
+({ \
+ size_t __len = (len); \
+ void *__ret; \
+ if (__builtin_constant_p(len) && __len >= 64) \
+ __ret = memmove((dst), (src), __len); \
+ else \
+ __ret = __builtin_memmove((dst), (src), __len); \
+ __ret; \
+})
+
+#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
@@ -4,7 +4,7 @@
lib-y += bitops.o csum_partial.o delay.o memcpy.o memset.o \
mips-atomic.o strlen_user.o strncpy_user.o \
- strnlen_user.o uncached.o
+ strnlen_user.o uncached.o memcmp.o
obj-y += iomap.o
obj-$(CONFIG_PCI) += iomap-pci.o
--- /dev/null
+++ b/arch/mips/lib/memcmp.c
@@ -0,0 +1,22 @@
+/*
+ * copied from linux/lib/string.c
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ */
+
+#include <linux/module.h>
+#include <linux/string.h>
+
+#undef memcmp
+int memcmp(const void *cs, const void *ct, size_t count)
+{
+ const unsigned char *su1, *su2;
+ int res = 0;
+
+ for (su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--)
+ if ((res = *su1 - *su2) != 0)
+ break;
+ return res;
+}
+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) \