# git rev-parse -q --verify 86de312343c4b56d699f8ed98aac8bdab1e94225^{commit}
86de312343c4b56d699f8ed98aac8bdab1e94225
already have revision, skipping fetch
# git checkout -q -f -B kisskb 86de312343c4b56d699f8ed98aac8bdab1e94225
# git clean -qxdf
# < git log -1
# commit 86de312343c4b56d699f8ed98aac8bdab1e94225
# Author: Nicholas Piggin <npiggin@gmail.com>
# Date:   Mon Jun 10 13:08:18 2019 +1000
# 
#     powerpc/64s/radix: Enable HAVE_ARCH_HUGE_VMAP
#     
#     This sets the HAVE_ARCH_HUGE_VMAP option, and defines the required
#     page table functions.
#     
#     This enables huge (2MB and 1GB) ioremap mappings. I don't have a
#     benchmark for this change, but huge vmap will be used by a later core
#     kernel change to enable huge vmalloc memory mappings. This improves
#     cached `git diff` performance by about 5% on a 2-node POWER9 with 32MB
#     size dentry cache hash.
#     
#       Profiling git diff dTLB misses with a vanilla kernel:
#     
#       81.75%  git      [kernel.vmlinux]    [k] __d_lookup_rcu
#        7.21%  git      [kernel.vmlinux]    [k] strncpy_from_user
#        1.77%  git      [kernel.vmlinux]    [k] find_get_entry
#        1.59%  git      [kernel.vmlinux]    [k] kmem_cache_free
#     
#                 40,168      dTLB-miss
#            0.100342754 seconds time elapsed
#     
#       With powerpc huge vmalloc:
#     
#                  2,987      dTLB-miss
#            0.095933138 seconds time elapsed
#     
#     Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-ld --version
# < git log --format=%s --max-count=1 86de312343c4b56d699f8ed98aac8bdab1e94225
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  randconfig
KCONFIG_SEED=0x97C7A4E
# 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 CONFIG_TRIM_UNUSED_KSYMS=n
# yes \n | make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  oldconfig
yes: standard output: Broken pipe
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  
In file included from /kisskb/src/arch/powerpc/xmon/xmon.c:67:0:
/kisskb/src/arch/powerpc/xmon/dis-asm.h: In function 'print_insn_powerpc':
/kisskb/src/arch/powerpc/xmon/dis-asm.h:20:2: warning: format '%x' expects argument of type 'unsigned int', but argument 2 has type 'long unsigned int' [-Wformat]
/kisskb/src/arch/powerpc/xmon/dis-asm.h: In function 'print_insn_spu':
/kisskb/src/arch/powerpc/xmon/dis-asm.h:26:2: warning: format '%x' expects argument of type 'unsigned int', but argument 2 has type 'long unsigned int' [-Wformat]
/kisskb/src/kernel/rcu/srcutree.c: In function 'init_srcu_struct_nodes':
/kisskb/src/kernel/rcu/srcutree.c:140:32: warning: 'levelspread[<Ua460>]' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl':
/kisskb/src/kernel/printk/printk.c:194:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/f2fs/file.c: In function 'f2fs_precache_extents':
/kisskb/src/fs/f2fs/file.c:2951:6: warning: 'err' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/base/regmap/regmap.c: In function '_regmap_raw_write':
/kisskb/src/drivers/base/regmap/regmap.c:1850:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/base/regmap/regmap.c: In function 'regmap_raw_read':
/kisskb/src/drivers/base/regmap/regmap.c:2589:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/f2fs/segment.c: In function 'f2fs_flush_sit_entries':
/kisskb/src/fs/f2fs/segment.c:3832:5: warning: array subscript is below array bounds [-Warray-bounds]
/kisskb/src/drivers/ata/ahci_qoriq.c: In function 'ahci_qoriq_hardreset':
/kisskb/src/arch/powerpc/include/asm/io.h:153:1: warning: 'px_is' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/ata/ahci_qoriq.c:88:14: note: 'px_is' was declared here
/kisskb/src/arch/powerpc/include/asm/io.h:153:1: warning: 'px_cmd' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/ata/ahci_qoriq.c:88:6: note: 'px_cmd' was declared here
/kisskb/src/fs/proc/inode.c: In function 'proc_reg_open':
/kisskb/src/include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/proc/inode.c:331:21: note: 'pdeo' was declared here
/kisskb/src/drivers/i2c/busses/i2c-sh_mobile.c: In function 'sh_mobile_i2c_isr_rx':
/kisskb/src/drivers/i2c/busses/i2c-sh_mobile.c:399:26: warning: 'data' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/seccomp.c: In function '__seccomp_filter':
/kisskb/src/kernel/seccomp.c:917:1: warning: no return statement in function returning non-void [-Wreturn-type]
/kisskb/src/drivers/iio/imu/bmi160/bmi160_core.c: In function 'bmi160_config_pin.constprop.8':
/kisskb/src/drivers/iio/imu/bmi160/bmi160_core.c:618:3: warning: 'pin_name' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/iio/imu/bmi160/bmi160_core.c:606:29: warning: 'int_map_mask' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/iio/imu/bmi160/bmi160_core.c:599:29: warning: 'int_latch_mask' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/iio/imu/bmi160/bmi160_core.c:577:47: warning: 'int_out_ctrl_shift' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/staging/comedi/drivers/pcl816.c: In function 'pcl816_ai_setup_chanlist':
/kisskb/src/drivers/staging/comedi/drivers/pcl816.c:148:6: warning: 'last_chan' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/staging/comedi/drivers/pcl816.c:157:15: note: 'last_chan' was declared here
/kisskb/src/drivers/staging/comedi/drivers/pcl818.c: In function 'pcl818_ai_setup_chanlist':
/kisskb/src/drivers/staging/comedi/drivers/pcl818.c:337:6: warning: 'last_chan' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/staging/comedi/drivers/pcl818.c:347:15: note: 'last_chan' was declared here
/kisskb/src/drivers/soc/qcom/rpmh.c: In function 'rpmh_write_batch':
/kisskb/src/drivers/soc/qcom/rpmh.c:355:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/media/platform/sti/delta/delta-mjpeg-dec.c: In function 'delta_mjpeg_decode':
/kisskb/src/drivers/media/platform/sti/delta/delta-mjpeg-dec.c:427:1: warning: the frame size of 1088 bytes is larger than 1024 bytes [-Wframe-larger-than=]
WARNING: vmlinux.o(.text.unlikely+0x38a4): Section mismatch in reference from the function .xive_spapr_disabled() to the function .init.text:.of_get_flat_dt_root()
The function .xive_spapr_disabled() references
the function __init .of_get_flat_dt_root().
This is often because .xive_spapr_disabled lacks a __init 
annotation or the annotation of .of_get_flat_dt_root is wrong.

WARNING: vmlinux.o(.text.unlikely+0x38d0): Section mismatch in reference from the function .xive_spapr_disabled() to the function .init.text:.of_get_flat_dt_prop()
The function .xive_spapr_disabled() references
the function __init .of_get_flat_dt_prop().
This is often because .xive_spapr_disabled lacks a __init 
annotation or the annotation of .of_get_flat_dt_prop is wrong.

Completed OK
# rm -rf /kisskb/build/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.6
# Build took: 0:02:01.876164