We are building backports 20160122 for a 3.3.8 kernel, and get
multiple build failures. The last backports build that works is
20151115. 20151120 fails.
One of several of the failures relates to atomics:
mkdir -p /usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD/.tmp_versions
; rm -f /usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD/.tmp_versions/*
/usr/bin/make -f scripts/Makefile.build
obj=/usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD
/usr/bin/make -f scripts/Makefile.build
obj=/usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD/compat
/usr/local/google/home/bk/src/gfiber/out/host/usr/bin/mips-qca-linux-uclibc-gcc
-Wp,-MD,/usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD/compat/.main.o.d
-I/usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD/backport-include/
-I/usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD/backport-include/uapi
-I/usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD/include/
-I/usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD/include/uapi
-include /usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD/backport-include/backport/backport.h
-Wno-unused-but-set-variable
-DCPTCFG_VERSION=\""backports-20160122-0-ga91a3e6"\"
-DCPTCFG_KERNEL_VERSION=\""next-20160122-0-gcccc613"\"
-DCPTCFG_KERNEL_NAME=\""Linux"\"
-I/usr/local/google/home/bk/src/gfiber/out/build/linux-HEAD/arch/mips/include
-Iarch/mips/include/generated -Iinclude -include
/usr/local/google/home/bk/src/gfiber/out/build/linux-HEAD/include/linux/kconfig.h
-D__KERNEL__ -D"VMLINUX_LOAD_ADDRESS=0xffffffff80060000"
-D"DATAOFFSET=0" -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs
-fno-strict-aliasing -fno-common -Werror-implicit-function-declaration
-Wno-format-security -fno-delete-null-pointer-checks -Os
-fno-caller-saves -mno-check-zero-division -mabi=32 -G 0 -mno-abicalls
-fno-pic -pipe -msoft-float -ffreestanding -march=mips32r2
-Wa,-mips32r2 -Wa,--trap
-I/usr/local/google/home/bk/src/gfiber/out/build/linux-HEAD/arch/mips/include/asm/mach-ath79
-I/usr/local/google/home/bk/src/gfiber/out/build/linux-HEAD/arch/mips/include/asm/mach-generic
-Wframe-larger-than=1024 -fno-stack-protector
-Wno-unused-but-set-variable -fomit-frame-pointer -g
-Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow
-fconserve-stack -DCC_HAVE_ASM_GOTO
-I/usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD/compat
-DMODULE -mno-long-calls -D"KBUILD_STR(s)=#s"
-D"KBUILD_BASENAME=KBUILD_STR(main)"
-D"KBUILD_MODNAME=KBUILD_STR(compat)" -c -o
/usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD/compat/main.o
/usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD/compat/main.c
In file included from include/linux/bitops.h:22:0,
from
/usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD/backport-include/linux/bitops.h:3,
from include/linux/kernel.h:17,
from
/usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD/backport-include/linux/kernel.h:3,
from include/linux/cache.h:4,
from include/linux/time.h:7,
from
/usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD/backport-include/linux/time.h:3,
from include/linux/stat.h:60,
from include/linux/module.h:10,
from
/usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD/backport-include/linux/module.h:3,
from
/usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD/compat/main.c:1:
/usr/local/google/home/bk/src/gfiber/out/build/linux-HEAD/arch/mips/include/asm/bitops.h:
In function 'clear_bit_unlock':
/usr/local/google/home/bk/src/gfiber/out/build/linux-HEAD/arch/mips/include/asm/bitops.h:180:2:
error: implicit declaration of function 'smp_mb__before_llsc'
[-Werror=implicit-function-declaration]
smp_mb__before_clear_bit();
^
Looking through the commits between 11/15 and 11/20, I found the patch
below could be related. So reverted it and problem disappeared:
commit bf4cedc367324783befc64bcc081474faf607932
Author: Hauke Mehrtens <hauke@xxxxxxxxxx>
Date: Sun Nov 22 19:03:18 2015 +0100
header: make asm/atomic.h include asm/barrier.h
Then on to the next unrelated failure:
finaltargets.backports-custom-HEAD: CC [M]
/usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD/compat/compat-3.7.o
finaltargets.backports-custom-HEAD: In file included from
include/linux/dma-mapping.h:68:0,
finaltargets.backports-custom-HEAD: from
/usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD/backport-include/linux/dma-mapping.h:3,
finaltargets.backports-custom-HEAD: from
include/asm-generic/pci-dma-compat.h:7,
finaltargets.backports-custom-HEAD: from
/usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD/backport-include/asm-generic/pci-dma-compat.h:3,
finaltargets.backports-custom-HEAD: from
/usr/local/google/home/bk/src/gfiber/out/build/linux-HEAD/arch/mips/include/asm/pci.h:132,
finaltargets.backports-custom-HEAD: from
include/linux/pci.h:1321,
finaltargets.backports-custom-HEAD: from
/usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD/backport-include/linux/pci.h:3,
finaltargets.backports-custom-HEAD: from
/usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD/compat/compat-3.7.c:13:
finaltargets.backports-custom-HEAD:
/usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD/backport-include/asm/dma-mapping.h:
In function 'backport_dma_get_sgtable_attrs':
finaltargets.backports-custom-HEAD:
/usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD/backport-include/asm/dma-mapping.h:21:2:
error: implicit declaration of function 'dma_common_get_sgtable'
[-Werror=implicit-function-declaration]
finaltargets.backports-custom-HEAD: return
dma_common_get_sgtable(dev, sgt, cpu_addr, dma_addr, size);
finaltargets.backports-custom-HEAD: ^
finaltargets.backports-custom-HEAD: cc1: some warnings being treated as errors
finaltargets.backports-custom-HEAD: make[8]: ***
[/usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD/compat/compat-3.7.o]
Error 1
finaltargets.backports-custom-HEAD: make[7]: ***
[/usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD/compat]
Error 2
finaltargets.backports-custom-HEAD: make[6]: ***
[_module_/usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD]
Error 2
finaltargets.backports-custom-HEAD: make[5]: *** [modules] Error 2
finaltargets.backports-custom-HEAD: make[4]: *** [modules] Error 2
finaltargets.backports-custom-HEAD: make[3]: *** [modules] Error 2
finaltargets.backports-custom-HEAD: make[2]: *** [default] Error 2
finaltargets.backports-custom-HEAD: make[2]: Leaving directory
`/usr/local/google/home/bk/src/gfiber/out/build/backports-custom-HEAD'
finaltargets.backports-custom-HEAD: exit: 2
This dirty hack works, but really prefer a better solution:
diff --git a/backport-include/asm/dma-mapping.h
b/backport-include/asm/dma-mapping.h
index b73b7da..7efd450 100644
--- a/backport-include/asm/dma-mapping.h
+++ b/backport-include/asm/dma-mapping.h
@@ -10,6 +10,7 @@ dma_common_get_sgtable(struct device *dev, struct
sg_table *sgt,
void *cpu_addr, dma_addr_t dma_addr, size_t size);
#endif /* defined(CPTCFG_BPAUTO_BUILD_DMA_SHARED_HELPERS) */
+#if 0
#if LINUX_VERSION_CODE < KERNEL_VERSION(3,6,0)
#define dma_get_sgtable_attrs LINUX_BACKPORT(dma_get_sgtable_attrs)
@@ -23,5 +24,6 @@ dma_get_sgtable_attrs(struct device *dev, struct
sg_table *sgt, void *cpu_addr,
#define dma_get_sgtable(d, t, v, h, s) dma_get_sgtable_attrs(d, t, v,
h, s, NULL)
#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(3,6,0) */
+#endif
#endif /* __BACKPORT_ASM_DMA_MAPPING_H */
Suggestions appreciated.
Thanks,
Marty
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