# git rev-parse -q --verify 6830fcf476286380beeac027eaa2718cb574438a^{commit}
6830fcf476286380beeac027eaa2718cb574438a
already have revision, skipping fetch
# git checkout -q -f -B kisskb 6830fcf476286380beeac027eaa2718cb574438a
# git clean -qxdf
# < git log -1
# commit 6830fcf476286380beeac027eaa2718cb574438a
# Author: Nicholas Piggin <npiggin@gmail.com>
# Date:   Tue May 22 09:00:00 2018 +1000
# 
#     powerpc/64s: Add support for a store forwarding barrier at kernel entry/exit
#     
#     commit a048a07d7f4535baa4cbad6bc024f175317ab938 upstream.
#     
#     On some CPUs we can prevent a vulnerability related to store-to-load
#     forwarding by preventing store forwarding between privilege domains,
#     by inserting a barrier in kernel entry and exit paths.
#     
#     This is known to be the case on at least Power7, Power8 and Power9
#     powerpc CPUs.
#     
#     Barriers must be inserted generally before the first load after moving
#     to a higher privilege, and after the last store before moving to a
#     lower privilege, HV and PR privilege transitions must be protected.
#     
#     Barriers are added as patch sections, with all kernel/hypervisor entry
#     points patched, and the exit points to lower privilge levels patched
#     similarly to the RFI flush patching.
#     
#     Firmware advertisement is not implemented yet, so CPU flush types
#     are hard coded.
#     
#     Thanks to Michal Suchánek for bug fixes and review.
#     
#     Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
#     Signed-off-by: Mauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com>
#     Signed-off-by: Michael Neuling <mikey@neuling.org>
#     Signed-off-by: Michal Suchánek <msuchanek@suse.de>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi-gcc --version
# < git log --format=%s --max-count=1 6830fcf476286380beeac027eaa2718cb574438a
# < make -s -j 48 ARCH=arm O=/kisskb/build/mpe_multi_v7_defconfig_arm CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi-  multi_v7_defconfig
# make -s -j 48 ARCH=arm O=/kisskb/build/mpe_multi_v7_defconfig_arm CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/arm-unknown-linux-gnueabi/bin/arm-unknown-linux-gnueabi-  
/kisskb/src/arch/arm/crypto/Makefile:26: These CRC Extensions modules need binutils 2.23 or higher
/kisskb/src/arch/arm/crypto/Makefile:27:  crc32-arm-ce.o
/kisskb/src/arch/arm/crypto/Makefile:36: These ARMv8 Crypto Extensions modules need binutils 2.23 or higher
/kisskb/src/arch/arm/crypto/Makefile:37:  aes-arm-ce.o sha1-arm-ce.o sha2-arm-ce.o ghash-arm-ce.o
/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/kernel/rcu/srcutree.c: In function 'init_srcu_struct_fields':
/kisskb/src/kernel/rcu/srcutree.c:146:32: warning: 'levelspread[<Ue820>]' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/rcu/srcutree.c:94:6: note: 'levelspread[<Ue820>]' was declared here
/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/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/drivers/dma-buf/reservation.c: In function 'reservation_object_add_shared_fence':
/kisskb/src/drivers/dma-buf/reservation.c:225:6: warning: 'k' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/net/mac80211/mlme.c: In function 'ieee80211_rx_mgmt_beacon':
/kisskb/src/net/mac80211/mlme.c:1351:3: warning: 'pwr_level_cisco' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/net/mac80211/mlme.c:1308:6: note: 'pwr_level_cisco' was declared here
/kisskb/src/drivers/clk/sunxi-ng/ccu_mux.c: In function 'ccu_mux_helper_determine_rate':
/kisskb/src/drivers/clk/sunxi-ng/ccu_mux.c:153:22: warning: 'best_parent' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/soc/qcom/wcnss_ctrl.c: In function 'wcnss_async_probe':
/kisskb/src/drivers/soc/qcom/wcnss_ctrl.c:307:5: warning: 'expect_cbc' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c: In function 'get_scale_config':
/kisskb/src/drivers/gpu/drm/msm/mdp/mdp5/mdp5.xml.h:1036:16: warning: 'uv_filter' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/gpu/drm/msm/mdp/mdp5/mdp5_plane.c:730:22: note: 'uv_filter' was declared here
/kisskb/src/drivers/gpu/drm/sun4i/sun4i_tcon.c: In function 'sun4i_tcon_bind':
/kisskb/src/drivers/gpu/drm/sun4i/sun4i_tcon.c:920:35: warning: 'has_lvds_alt' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/usb/host/xhci-tegra.c: In function 'tegra_xusb_mbox_thread':
/kisskb/src/drivers/usb/host/xhci-tegra.c:552:6: warning: 'err' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/usb/host/xhci-tegra.c:482:6: note: 'err' was declared here
/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]
Completed OK
# rm -rf /kisskb/build/mpe_multi_v7_defconfig_arm
# Build took: 0:02:12.746125