# git rev-parse -q --verify 66763e9d1f6a8eda00da3a32c007b2af61412c10^{commit}
66763e9d1f6a8eda00da3a32c007b2af61412c10
already have revision, skipping fetch
# git checkout -q -f -B kisskb 66763e9d1f6a8eda00da3a32c007b2af61412c10
# git clean -qxdf
# git log -1
commit 66763e9d1f6a8eda00da3a32c007b2af61412c10
Author: Michael Ellerman <mpe@ellerman.id.au>
Date:   Tue Mar 13 15:58:11 2018 +1100

    powerpc/64s: Fix NULL AT_BASE_PLATFORM when using DT CPU features
    
    When running virtualised the powerpc kernel is able to run the system
    in "compat mode" - which means the kernel and hardware are pretending
    to userspace that the CPU is an older version than it actually is.
    
    AT_BASE_PLATFORM is an AUXV entry that we export to userspace for use
    when we're running in that mode, which tells userspace the "platform"
    string for the real CPU version, as opposed to the faked version.
    
    Although we don't support compat mode when using DT CPU features, and
    arguably don't need to set AT_BASE_PLATFORM, the existing cputable
    based code always sets it even when we're running bare metal. That
    means the lack of AT_BASE_PLATFORM is a user-visible artifact of the
    fact that the kernel is using DT CPU features, which we don't want.
    
    So set it in the DT CPU features code also.
    
    This results in eg:
      $ LD_SHOW_AUXV=1 /bin/true | grep "AT_.*PLATFORM"
      AT_PLATFORM:     power9
      AT_BASE_PLATFORM:power9
    
    Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version
# < git log --format=%s --max-count=1 66763e9d1f6a8eda00da3a32c007b2af61412c10
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_powerpc-allmodconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  allmodconfig
# Added to kconfig CONFIG_BUILD_DOCSRC=n
# Added to kconfig CONFIG_MODULE_SIG=n
# Added to kconfig CONFIG_SAMPLES=n
# yes \n | make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_powerpc-allmodconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  oldconfig
yes: standard output: Broken pipe
yes: write error
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_powerpc-allmodconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  
/kisskb/src/arch/powerpc/kvm/powerpc.c: In function 'kvmppc_handle_load128_by2x64':
/kisskb/src/arch/powerpc/kvm/powerpc.c:1361:2: warning: 'emulated' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/ata/ahci_qoriq.c: In function 'ahci_qoriq_hardreset':
/kisskb/src/arch/powerpc/include/asm/io-defs.h:12:1: warning: 'px_is' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/ata/ahci_qoriq.c:86:14: note: 'px_is' was declared here
/kisskb/src/arch/powerpc/include/asm/io-defs.h:12:1: warning: 'px_cmd' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/ata/ahci_qoriq.c:86:6: note: 'px_cmd' was declared here
/kisskb/src/kernel/cgroup/cgroup-v1.c: In function 'cgroup1_mount':
/kisskb/src/kernel/cgroup/cgroup-v1.c:1268:20: warning: 'root' 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:183:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/mm/swap_state.c: In function '__add_to_swap_cache':
/kisskb/src/mm/swap_state.c:135:5: warning: 'error' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/auxdisplay/img-ascii-lcd.c: In function 'malta_update':
/kisskb/src/drivers/auxdisplay/img-ascii-lcd.c:109:5: warning: 'err' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/auxdisplay/img-ascii-lcd.c: In function 'sead3_update':
/kisskb/src/drivers/auxdisplay/img-ascii-lcd.c:207:5: warning: 'err' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/mm/hugetlb.c: In function 'alloc_pool_huge_page':
/kisskb/src/mm/hugetlb.c:1439:5: warning: 'page' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/sound/hda/hdac_regmap.c: In function 'hda_reg_write':
/kisskb/src/sound/hda/hdac_regmap.c:282:16: warning: 'err' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/btrfs/ref-verify.c: In function 'process_extent_item.isra.0':
/kisskb/src/fs/btrfs/ref-verify.c:516:2: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/btrfs/ref-verify.c: In function 'process_leaf':
/kisskb/src/fs/btrfs/ref-verify.c:568:2: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/sound/soc/codecs/arizona.c: In function 'arizona_hw_params':
/kisskb/src/sound/soc/codecs/arizona.c:1889:3: warning: 'aif_rx_state' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/sound/soc/codecs/arizona.c:1886:3: warning: 'aif_tx_state' 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:2786:6: warning: 'err' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/net/bridge/br_netlink.c: In function 'br_process_vlan_info':
/kisskb/src/net/bridge/br_netlink.c:577:10: warning: 'err' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/sound/soc/codecs/da7219-aad.c: In function 'da7219_aad_hptest_work':
/kisskb/src/sound/soc/codecs/da7219-aad.c:318:17: warning: 'pll_ctrl' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/nfsd/nfs4xdr.c: In function 'nfsd4_encode_components_esc':
/kisskb/src/fs/nfsd/nfs4xdr.c:2043:9: warning: 'str' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/sound/soc/codecs/rt5665.c: In function 'rt5665_i2s_pin_event':
/kisskb/src/sound/soc/codecs/rt5665.c:2666:23: warning: 'val2' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/sound/soc/codecs/rt5665.c:2663:23: warning: 'val1' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/dma-buf/reservation.c: In function 'reservation_object_add_shared_replace':
/kisskb/src/drivers/dma-buf/reservation.c:207:2: warning: 'k' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/dma-buf/reservation.c:210:7: warning: 'i' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/net/mac80211/mlme.c: In function 'ieee80211_handle_pwr_constr.isra.12':
/kisskb/src/net/mac80211/mlme.c:1350:3: warning: 'pwr_level_cisco' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/iommu/io-pgtable-arm-v7s.c: In function '__arm_v7s_map.constprop.5':
/kisskb/src/drivers/iommu/io-pgtable-arm-v7s.c:433:7: warning: 'cptep' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/input/joystick/analog.c:176:2: warning: #warning Precise timer not defined for this architecture. [-Wcpp]
/kisskb/src/fs/xfs/scrub/agheader.c: In function 'xfs_scrub_agfl':
/kisskb/src/fs/xfs/scrub/agheader.c:770:9: warning: missing braces around initializer [-Wmissing-braces]
/kisskb/src/fs/xfs/scrub/agheader.c:770:9: warning: (near initialization for 'sai.oinfo') [-Wmissing-braces]
/kisskb/src/drivers/input/rmi4/rmi_f11.c: In function 'rmi_f11_finger_handler':
/kisskb/src/drivers/input/rmi4/rmi_f11.c:631:3: warning: 'abs_fingers' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/media/usb/dvb-usb/pctv452e.c: In function 'pctv452e_frontend_attach':
/kisskb/src/drivers/media/usb/dvb-usb/pctv452e.c:922:2: warning: value computed is not used [-Wunused-value]
/kisskb/src/drivers/net/tun.c: In function 'tun_get_user':
/kisskb/src/drivers/net/tun.c:1820:30: warning: 'copylen' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/net/tun.c:1730:46: warning: 'linear' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/tty/serial/8250/8250_core.c: In function 'serial_unlink_irq_chain':
/kisskb/src/drivers/tty/serial/8250/8250_core.c:251:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/net/wireless/broadcom/b43/phy_n.c: In function 'b43_nphy_rf_ctl_override_rev7':
/kisskb/src/drivers/net/wireless/broadcom/b43/phy_n.c:202:21: warning: 'val_addr' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c: In function 'rtl8723a_phy_lc_calibrate':
/kisskb/src/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c:3481:23: warning: 'rf_amode' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c: In function 'ibmvscsis_rdma':
/kisskb/src/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c:3323:18: warning: 'server_ioba' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c:3317:18: warning: 'client_ioba' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/top/gk104.c: In function 'gk104_top_oneinit':
/kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/top/gk104.c:101:1: warning: 'inst' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/gpu/drm/nouveau/nvkm/subdev/top/gk104.c:101:1: warning: 'type' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c: In function 'update_root_ft_create':
/kisskb/src/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c:867:5: warning: 'err' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/staging/lustre/lustre/ptlrpc/nrs.c: In function 'ptlrpc_nrs_policy_register.constprop.1':
/kisskb/src/include/linux/string.h:266:29: warning: array subscript is above array bounds [-Warray-bounds]
/kisskb/src/drivers/gpu/drm/nouveau/nv50_display.c: In function 'nv50_head_lut_load':
/kisskb/src/arch/powerpc/include/asm/io.h:178:1: warning: 'b' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/gpu/drm/nouveau/nv50_display.c:1813:18: note: 'b' was declared here
/kisskb/src/arch/powerpc/include/asm/io.h:178:1: warning: 'g' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/gpu/drm/nouveau/nv50_display.c:1813:15: note: 'g' was declared here
/kisskb/src/arch/powerpc/include/asm/io.h:178:1: warning: 'r' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/gpu/drm/nouveau/nv50_display.c:1813:12: note: 'r' was declared here
WARNING: vmlinux.o(.text+0x7a23c): Section mismatch in reference from the function .stop_machine_change_mapping() to the function .meminit.text:.create_physical_mapping()
The function .stop_machine_change_mapping() references
the function __meminit .create_physical_mapping().
This is often because .stop_machine_change_mapping lacks a __meminit 
annotation or the annotation of .create_physical_mapping is wrong.

WARNING: vmlinux.o(.text+0x7a248): Section mismatch in reference from the function .stop_machine_change_mapping() to the function .meminit.text:.create_physical_mapping()
The function .stop_machine_change_mapping() references
the function __meminit .create_physical_mapping().
This is often because .stop_machine_change_mapping lacks a __meminit 
annotation or the annotation of .create_physical_mapping is wrong.

WARNING: vmlinux.o(.text.unlikely+0x1c8): Section mismatch in reference from the function .init_fallback_flush() to the function .init.text:.ppc64_bolted_size()
The function .init_fallback_flush() references
the function __init .ppc64_bolted_size().
This is often because .init_fallback_flush lacks a __init 
annotation or the annotation of .ppc64_bolted_size is wrong.

WARNING: vmlinux.o(.text.unlikely+0x1f4): Section mismatch in reference from the function .init_fallback_flush() to the function .init.text:.memblock_alloc_base()
The function .init_fallback_flush() references
the function __init .memblock_alloc_base().
This is often because .init_fallback_flush lacks a __init 
annotation or the annotation of .memblock_alloc_base is wrong.

WARNING: vmlinux.o(.text.unlikely+0x32f4): Section mismatch in reference from the function .pnv_setup_rfi_flush() to the function .init.text:.setup_rfi_flush()
The function .pnv_setup_rfi_flush() references
the function __init .setup_rfi_flush().
This is often because .pnv_setup_rfi_flush lacks a __init 
annotation or the annotation of .setup_rfi_flush is wrong.

WARNING: drivers/hwmon/ibmpowernv.o(.text+0xa3c): Section mismatch in reference from the function .create_device_attrs() to the function .init.text:.make_sensor_label()
The function .create_device_attrs() references
the function __init .make_sensor_label().
This is often because .create_device_attrs lacks a __init 
annotation or the annotation of .make_sensor_label is wrong.

/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-ld: drivers/misc/lkdtm.o: .opd is not a regular array of opd entries
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_powerpc-allmodconfig_powerpc
# Build took: 0:12:37.824689