# git rev-parse -q --verify e41b93a6be57e26a4a123345f826a6ac3a213551^{commit}
e41b93a6be57e26a4a123345f826a6ac3a213551
already have revision, skipping fetch
# git checkout -q -f -B kisskb e41b93a6be57e26a4a123345f826a6ac3a213551
# git clean -qxdf
# < git log -1
# commit e41b93a6be57e26a4a123345f826a6ac3a213551
# Author: Michael Ellerman <mpe@ellerman.id.au>
# Date:   Mon Dec 3 19:55:55 2018 +1100
# 
#     powerpc/boot: Fix build failures with -j 1
#     
#     In commit 5e9dcb6188a4 ("powerpc/boot: Expose Kconfig symbols to
#     wrapper") we added a dependency to serial.c on autoconf.h:
#     
#       $(obj)/serial.c: $(obj)/autoconf.h
#     
#     This works when building in-tree (ie. with KBUILD_OUTPUT unset)
#     because the obj tree is the src tree.
#     
#     But when building with eg. O=build and -j 1 the build fails:
#     
#       gcc ... -I../arch/powerpc/boot -c -o arch/powerpc/boot/serial.o arch/powerpc/boot/serial.c
#       gcc: error: arch/powerpc/boot/serial.c: No such file or directory
#     
#     Why this is only happening with -j 1 is not clear, when building with
#     -j greater than 1 somehow we decide to look for serial.c in the src
#     tree (../), eg:
#     
#       gcc -I../arch/powerpc/boot -c -o arch/powerpc/boot/serial.o ../arch/powerpc/boot/serial.c
#     
#     Regardless we shouldn't be specifying a dependency on serial.c in the
#     build tree, we want to add a dependency to the version in $(srctree)
#     so fix the rule to say that.
#     
#     Fixes: 5e9dcb6188a4 ("powerpc/boot: Expose Kconfig symbols to wrapper")
#     Tested-by: Daniel Axtens <dja@axtens.net>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < git log --format=%s --max-count=1 e41b93a6be57e26a4a123345f826a6ac3a213551
# < make -s -j 40 ARCH=powerpc O=/kisskb/build/powerpc-fixes_powerpc-randconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  randconfig
KCONFIG_SEED=0xAF0F6234
# Added to kconfig CONFIG_STANDALONE=y
# Added to kconfig CONFIG_BUILD_DOCSRC=n
# Added to kconfig CONFIG_MODULE_SIG=n
# Added to kconfig CONFIG_CPU_BIG_ENDIAN=y
# Added to kconfig CONFIG_PPC64=y
# Added to kconfig CONFIG_PPC_DISABLE_WERROR=y
# Added to kconfig CONFIG_SECTION_MISMATCH_WARN_ONLY=y
# Added to kconfig CONFIG_PREVENT_FIRMWARE_BUILD=y
# Added to kconfig CONFIG_CC_STACKPROTECTOR_STRONG=n
# Added to kconfig CONFIG_GCC_PLUGINS=n
# Added to kconfig CONFIG_LD_HEAD_STUB_CATCH=y
# Added to kconfig 
# yes \n | make -s -j 40 ARCH=powerpc O=/kisskb/build/powerpc-fixes_powerpc-randconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  oldconfig
yes: standard output: Broken pipe
# make -s -j 40 ARCH=powerpc O=/kisskb/build/powerpc-fixes_powerpc-randconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
/kisskb/src/scripts/unifdef.c: In function 'Mpass':
/kisskb/src/scripts/unifdef.c:453:28: warning: 'strncpy' output truncated before terminating nul copying 4 bytes from a string of the same length [-Wstringop-truncation]
 static void Mpass (void) { strncpy(keyword, "if  ", 4); Pelif(); }
                            ^~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /kisskb/src/include/linux/wait.h:9:0,
                 from /kisskb/src/include/linux/wait_bit.h:8,
                 from /kisskb/src/include/linux/fs.h:6,
                 from /kisskb/src/include/linux/seq_file.h:11,
                 from /kisskb/src/kernel/sched/psi.c:128:
/kisskb/src/kernel/sched/psi.c: In function 'cgroup_move_task':
/kisskb/src/include/linux/spinlock.h:273:32: warning: 'rq' may be used uninitialized in this function [-Wmaybe-uninitialized]
 #define raw_spin_unlock(lock)  _raw_spin_unlock(lock)
                                ^
/kisskb/src/kernel/sched/psi.c:639:13: note: 'rq' was declared here
  struct rq *rq;
             ^
/kisskb/src/arch/powerpc/kernel/eeh.c:1752:12: warning: 'proc_eeh_show' defined but not used [-Wunused-function]
 static int proc_eeh_show(struct seq_file *m, void *v)
            ^
/kisskb/src/drivers/usb/misc/usbtest.c: In function 'test_queue':
/kisskb/src/drivers/usb/misc/usbtest.c:2128:1: warning: the frame size of 1248 bytes is larger than 1024 bytes [-Wframe-larger-than=]
 }
 ^
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_powerpc-randconfig_powerpc-gcc5
# Build took: 0:01:05.875462