# git rev-parse -q --verify 2923b27e54242acf27fd16b299e102117c82f52f^{commit}
2923b27e54242acf27fd16b299e102117c82f52f
already have revision, skipping fetch
# git checkout -q -f -B kisskb 2923b27e54242acf27fd16b299e102117c82f52f
# git clean -qxdf
# < git log -1
# commit 2923b27e54242acf27fd16b299e102117c82f52f
# Merge: 828bf6e904eb c953cc987ab8
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sat Aug 25 18:43:59 2018 -0700
# 
#     Merge tag 'libnvdimm-for-4.19_dax-memory-failure' of gitolite.kernel.org:pub/scm/linux/kernel/git/nvdimm/nvdimm
#     
#     Pull libnvdimm memory-failure update from Dave Jiang:
#      "As it stands, memory_failure() gets thoroughly confused by dev_pagemap
#       backed mappings. The recovery code has specific enabling for several
#       possible page states and needs new enabling to handle poison in dax
#       mappings.
#     
#       In order to support reliable reverse mapping of user space addresses:
#     
#        1/ Add new locking in the memory_failure() rmap path to prevent races
#           that would typically be handled by the page lock.
#     
#        2/ Since dev_pagemap pages are hidden from the page allocator and the
#           "compound page" accounting machinery, add a mechanism to determine
#           the size of the mapping that encompasses a given poisoned pfn.
#     
#        3/ Given pmem errors can be repaired, change the speculatively
#           accessed poison protection, mce_unmap_kpfn(), to be reversible and
#           otherwise allow ongoing access from the kernel.
#     
#       A side effect of this enabling is that MADV_HWPOISON becomes usable
#       for dax mappings, however the primary motivation is to allow the
#       system to survive userspace consumption of hardware-poison via dax.
#       Specifically the current behavior is:
#     
#          mce: Uncorrected hardware memory error in user-access at af34214200
#          {1}[Hardware Error]: It has been corrected by h/w and requires no further action
#          mce: [Hardware Error]: Machine check events logged
#          {1}[Hardware Error]: event severity: corrected
#          Memory failure: 0xaf34214: reserved kernel page still referenced by 1 users
#          [..]
#          Memory failure: 0xaf34214: recovery action for reserved kernel page: Failed
#          mce: Memory error not recovered
#          <reboot>
#     
#       ...and with these changes:
#     
#          Injecting memory failure for pfn 0x20cb00 at process virtual address 0x7f763dd00000
#          Memory failure: 0x20cb00: Killing dax-pmd:5421 due to hardware memory corruption
#          Memory failure: 0x20cb00: recovery action for dax page: Recovered
#     
#       Given all the cross dependencies I propose taking this through
#       nvdimm.git with acks from Naoya, x86/core, x86/RAS, and of course dax
#       folks"
#     
#     * tag 'libnvdimm-for-4.19_dax-memory-failure' of gitolite.kernel.org:pub/scm/linux/kernel/git/nvdimm/nvdimm:
#       libnvdimm, pmem: Restore page attributes when clearing errors
#       x86/memory_failure: Introduce {set, clear}_mce_nospec()
#       x86/mm/pat: Prepare {reserve, free}_memtype() for "decoy" addresses
#       mm, memory_failure: Teach memory_failure() about dev_pagemap pages
#       filesystem-dax: Introduce dax_lock_mapping_entry()
#       mm, memory_failure: Collect mapping size in collect_procs()
#       mm, madvise_inject_error: Let memory_failure() optionally take a page reference
#       mm, dev_pagemap: Do not clear ->mapping on final put
#       mm, madvise_inject_error: Disable MADV_SOFT_OFFLINE for ZONE_DEVICE pages
#       filesystem-dax: Set page->index
#       device-dax: Set page->index
#       device-dax: Enable page_mapping()
#       device-dax: Convert to vmf_insert_mixed and vm_fault_t
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < git log --format=%s --max-count=1 2923b27e54242acf27fd16b299e102117c82f52f
# < make -s -j 120 ARCH=powerpc O=/kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  randconfig
KCONFIG_SEED=0xFB3BD19E

WARNING: unmet direct dependencies detected for HOTPLUG_CPU
  Depends on [n]: SMP [=y] && (PPC_PSERIES [=n] || PPC_PMAC [=n] || PPC_POWERNV [=n] || FSL_SOC_BOOKE [=n])
  Selected by [y]:
  - PM_SLEEP_SMP [=y] && SMP [=y] && (ARCH_SUSPEND_POSSIBLE [=y] || ARCH_HIBERNATION_POSSIBLE [=y]) && PM_SLEEP [=y]

WARNING: unmet direct dependencies detected for HOTPLUG_CPU
  Depends on [n]: SMP [=y] && (PPC_PSERIES [=n] || PPC_PMAC [=n] || PPC_POWERNV [=n] || FSL_SOC_BOOKE [=n])
  Selected by [y]:
  - PM_SLEEP_SMP [=y] && SMP [=y] && (ARCH_SUSPEND_POSSIBLE [=y] || ARCH_HIBERNATION_POSSIBLE [=y]) && PM_SLEEP [=y]
# 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 120 ARCH=powerpc O=/kisskb/build/linus-rand_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 120 ARCH=powerpc O=/kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
/kisskb/src/drivers/cpufreq/powernv-cpufreq.c: In function 'init_chip_info':
/kisskb/src/drivers/cpufreq/powernv-cpufreq.c:1071:1: warning: the frame size of 1056 bytes is larger than 1024 bytes [-Wframe-larger-than=]
 }
 ^
/kisskb/src/fs/ocfs2/dlmglue.c:99:30: warning: 'lockdep_keys' defined but not used [-Wunused-variable]
 static struct lock_class_key lockdep_keys[OCFS2_NUM_LOCK_TYPES];
                              ^
/kisskb/src/drivers/ntb/hw/idt/ntb_hw_idt.c: In function 'idt_scan_mws':
/kisskb/src/drivers/ntb/hw/idt/ntb_hw_idt.c:1117:1: warning: the frame size of 1040 bytes is larger than 1024 bytes [-Wframe-larger-than=]
 }
 ^
/kisskb/src/drivers/net/ethernet/neterion/vxge/vxge-main.c: In function 'vxge_poll_inta':
/kisskb/src/drivers/net/ethernet/neterion/vxge/vxge-main.c:1869:1: warning: the frame size of 1088 bytes is larger than 1024 bytes [-Wframe-larger-than=]
 }
 ^
/kisskb/src/net/core/rtnetlink.c: In function 'rtnl_newlink':
/kisskb/src/net/core/rtnetlink.c:3148:1: warning: the frame size of 1264 bytes is larger than 1024 bytes [-Wframe-larger-than=]
 }
 ^
/kisskb/src/drivers/net/ethernet/neterion/vxge/vxge-main.c: In function 'vxge_tx_msix_handle':
/kisskb/src/drivers/net/ethernet/neterion/vxge/vxge-main.c:2240:1: warning: the frame size of 1040 bytes is larger than 1024 bytes [-Wframe-larger-than=]
 }
 ^
/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 1264 bytes is larger than 1024 bytes [-Wframe-larger-than=]
 }
 ^
Completed OK
# rm -rf /kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc5
# Build took: 0:02:13.781613