# git rev-parse -q --verify 52a5525214d0d612160154d902956eca0558b7c0^{commit}
52a5525214d0d612160154d902956eca0558b7c0
already have revision, skipping fetch
# git checkout -q -f -B kisskb 52a5525214d0d612160154d902956eca0558b7c0
# git clean -qxdf
# < git log -1
# commit 52a5525214d0d612160154d902956eca0558b7c0
# Merge: bbfe0d6b8b73 e95adb9add75
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Mon Sep 16 14:14:40 2019 -0700
# 
#     Merge tag 'iommu-updates-v5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
#     
#     Pull iommu updates from Joerg Roedel:
#     
#      - batched unmap support for the IOMMU-API
#     
#      - support for unlocked command queueing in the ARM-SMMU driver
#     
#      - rework the ATS support in the ARM-SMMU driver
#     
#      - more refactoring in the ARM-SMMU driver to support hardware
#        implemention specific quirks and errata
#     
#      - bounce buffering DMA-API implementatation in the Intel VT-d driver
#        for untrusted devices (like Thunderbolt devices)
#     
#      - fixes for runtime PM support in the OMAP iommu driver
#     
#      - MT8183 IOMMU support in the Mediatek IOMMU driver
#     
#      - rework of the way the IOMMU core sets the default domain type for
#        groups. Changing the default domain type on x86 does not require two
#        kernel parameters anymore.
#     
#      - more smaller fixes and cleanups
#     
#     * tag 'iommu-updates-v5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (113 commits)
#       iommu/vt-d: Declare Broadwell igfx dmar support snafu
#       iommu/vt-d: Add Scalable Mode fault information
#       iommu/vt-d: Use bounce buffer for untrusted devices
#       iommu/vt-d: Add trace events for device dma map/unmap
#       iommu/vt-d: Don't switch off swiotlb if bounce page is used
#       iommu/vt-d: Check whether device requires bounce buffer
#       swiotlb: Split size parameter to map/unmap APIs
#       iommu/omap: Mark pm functions __maybe_unused
#       iommu/ipmmu-vmsa: Disable cache snoop transactions on R-Car Gen3
#       iommu/ipmmu-vmsa: Move IMTTBCR_SL0_TWOBIT_* to restore sort order
#       iommu: Don't use sme_active() in generic code
#       iommu/arm-smmu-v3: Fix build error without CONFIG_PCI_ATS
#       iommu/qcom: Use struct_size() helper
#       iommu: Remove wrong default domain comments
#       iommu/dma: Fix for dereferencing before null checking
#       iommu/mediatek: Clean up struct mtk_smi_iommu
#       memory: mtk-smi: Get rid of need_larbid
#       iommu/mediatek: Fix VLD_PA_RNG register backup when suspend
#       memory: mtk-smi: Add bus_sel for mt8183
#       memory: mtk-smi: Invoke pm runtime_callback to enable clocks
#       ...
# < /opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 52a5525214d0d612160154d902956eca0558b7c0
# < make -s -j 24 ARCH=um O=/kisskb/build/linus_um-allmodconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 allmodconfig
# Added to kconfig CONFIG_STANDALONE=y
# Added to kconfig CONFIG_KCOV=n
# Added to kconfig CONFIG_GCC_PLUGINS=n
# Added to kconfig CONFIG_GCC_PLUGIN_CYC_COMPLEXITY=n
# Added to kconfig CONFIG_GCC_PLUGIN_SANCOV=n
# Added to kconfig CONFIG_GCC_PLUGIN_LATENT_ENTROPY=n
# Added to kconfig CONFIG_GCC_PLUGIN_STRUCTLEAK=n
# Added to kconfig CONFIG_GCC_PLUGIN_RANDSTRUCT=n
# Added to kconfig CONFIG_UML_NET=n
# Added to kconfig CONFIG_UML_NET_ETHERTAP=n
# Added to kconfig CONFIG_UML_NET_TUNTAP=n
# Added to kconfig CONFIG_UML_NET_SLIP=n
# Added to kconfig CONFIG_UML_NET_DAEMON=n
# Added to kconfig CONFIG_UML_NET_VDE=n
# Added to kconfig CONFIG_UML_NET_MCAST=n
# Added to kconfig CONFIG_UML_NET_PCAP=n
# Added to kconfig CONFIG_UML_NET_SLIRP=n
# Added to kconfig CONFIG_GCOV_KERNEL=n
# yes \n | make -s -j 24 ARCH=um O=/kisskb/build/linus_um-allmodconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 oldconfig
yes: standard output: Broken pipe
# make -s -j 24 ARCH=um O=/kisskb/build/linus_um-allmodconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 
/kisskb/src/arch/um/os-Linux/signal.c: In function 'timer_real_alarm_handler':
/kisskb/src/arch/um/os-Linux/signal.c:93:1: warning: the frame size of 2960 bytes is larger than 2048 bytes [-Wframe-larger-than=]
 }
 ^
/kisskb/src/arch/um/os-Linux/signal.c: In function 'sig_handler_common':
/kisskb/src/arch/um/os-Linux/signal.c:51:1: warning: the frame size of 2976 bytes is larger than 2048 bytes [-Wframe-larger-than=]
 }
 ^
/kisskb/src/security/apparmor/policy_unpack.c: In function 'unpack_profile':
/kisskb/src/security/apparmor/policy_unpack.c:523:9: warning: 'pos' may be used uninitialized in this function [-Wmaybe-uninitialized]
      str[pos] = ':';
         ^
/kisskb/src/security/apparmor/policy_unpack.c:494:14: note: 'pos' was declared here
    int c, j, pos, size2 = unpack_strdup(e, &str, NULL);
              ^
/kisskb/src/mm/hmm.c: In function 'hmm_vma_walk_pud':
/kisskb/src/mm/hmm.c:753:9: error: implicit declaration of function 'pud_pfn' [-Werror=implicit-function-declaration]
   pfn = pud_pfn(pud) + ((addr & ~PUD_MASK) >> PAGE_SHIFT);
         ^
cc1: some warnings being treated as errors
make[2]: *** [/kisskb/src/scripts/Makefile.build:281: mm/hmm.o] Error 1
make[1]: *** [/kisskb/src/Makefile:1083: mm] Error 2
make[1]: *** Waiting for unfinished jobs....
/kisskb/src/drivers/misc/lkdtm/bugs.c: In function 'lkdtm_UNSET_SMEP':
/kisskb/src/drivers/misc/lkdtm/bugs.c:279:8: error: implicit declaration of function 'native_read_cr4' [-Werror=implicit-function-declaration]
  cr4 = native_read_cr4();
        ^
/kisskb/src/drivers/misc/lkdtm/bugs.c:281:13: error: 'X86_CR4_SMEP' undeclared (first use in this function)
  if ((cr4 & X86_CR4_SMEP) != X86_CR4_SMEP) {
             ^
/kisskb/src/drivers/misc/lkdtm/bugs.c:281:13: note: each undeclared identifier is reported only once for each function it appears in
/kisskb/src/drivers/misc/lkdtm/bugs.c:288:2: error: implicit declaration of function 'native_write_cr4' [-Werror=implicit-function-declaration]
  native_write_cr4(cr4);
  ^
cc1: some warnings being treated as errors
make[4]: *** [/kisskb/src/scripts/Makefile.build:281: drivers/misc/lkdtm/bugs.o] Error 1
make[3]: *** [/kisskb/src/scripts/Makefile.build:497: drivers/misc/lkdtm] Error 2
make[3]: *** Waiting for unfinished jobs....
make[2]: *** [/kisskb/src/scripts/Makefile.build:497: drivers/misc] Error 2
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [/kisskb/src/Makefile:1083: drivers] Error 2
make: *** [Makefile:179: sub-make] Error 2
Command 'make -s -j 24 ARCH=um O=/kisskb/build/linus_um-allmodconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 ' returned non-zero exit status 2
# rm -rf /kisskb/build/linus_um-allmodconfig_um-x86_64
# Build took: 0:04:59.863214