# 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/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-gcc --version
# < git log --format=%s --max-count=1 2923b27e54242acf27fd16b299e102117c82f52f
# < make -s -j 120 ARCH=x86_64 O=/kisskb/build/linus-rand_x86_64-randconfig_x86_64 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-  randconfig
KCONFIG_SEED=0x818A95C0
# Added to kconfig CONFIG_STANDALONE=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_GCC_PLUGIN_CYC_COMPLEXITY=n
# Added to kconfig CONFIG_GCC_PLUGIN_SANCOV=n
# Added to kconfig CONFIG_GCC_PLUGIN_LATENT_ENTROPY=n
# yes \n | make -s -j 120 ARCH=x86_64 O=/kisskb/build/linus-rand_x86_64-randconfig_x86_64 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-  oldconfig
yes: standard output: Broken pipe
# make -s -j 120 ARCH=x86_64 O=/kisskb/build/linus-rand_x86_64-randconfig_x86_64 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-  
/kisskb/src/scripts/unifdef.c: In function 'Mpass':
/kisskb/src/scripts/unifdef.c:453:28: warning: 'strncpy' output truncated before terminating nul copying 4 bytes from a string of the same length [-Wstringop-truncation]
 static void Mpass (void) { strncpy(keyword, "if  ", 4); Pelif(); }
                            ^~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl':
/kisskb/src/kernel/printk/printk.c:186:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/arch/x86/kernel/apic/io_apic.c: In function 'mp_map_pin_to_irq':
/kisskb/src/arch/x86/kernel/apic/io_apic.c:1034:6: warning: 'irq' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/ipc/shm.c: In function 'ksys_shmdt':
/kisskb/src/ipc/shm.c:1685:59: warning: 'file' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/arch/x86/kernel/e820.c: In function 'e820__setup_pci_gap':
/kisskb/src/arch/x86/kernel/e820.c:651:16: warning: 'gapstart' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/arch/x86/kernel/hw_breakpoint.c: In function 'hw_breakpoint_arch_parse':
/kisskb/src/arch/x86/kernel/hw_breakpoint.c:366:18: warning: 'align' may be used uninitialized in this function [-Wuninitialized]
/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:341:21: note: 'pdeo' was declared here
/kisskb/src/sound/core/pcm_iec958.c: In function 'create_iec958_consumer':
/kisskb/src/sound/core/pcm_iec958.c:80:9: warning: 'ws' may be used uninitialized in this function [-Wuninitialized]
/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/char/tpm/tpm-sysfs.c: In function 'pubek_show':
/kisskb/src/drivers/char/tpm/tpm-sysfs.c:37:16: warning: 'tpm_buf.data' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/lib/mpi/mpicoder.c: In function 'mpi_read_raw_from_sgl':
/kisskb/src/lib/mpi/mpicoder.c:352:8: warning: 'buff' 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:211:7: warning: 'i' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/splice.c: In function '__do_compat_sys_vmsplice':
/kisskb/src/fs/splice.c:1384:29: warning: 'type' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/splice.c: In function '__do_sys_vmsplice':
/kisskb/src/fs/splice.c:1358:22: warning: 'type' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/mm/ksm.c: In function 'stable_node_dup':
/kisskb/src/mm/ksm.c:1395:15: warning: 'found_rmap_hlist_len' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/lib/rhashtable.c: In function 'rhashtable_rehash_one':
/kisskb/src/lib/rhashtable.c:265:2: warning: 'next' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/i2c/i2c-core-base.c: In function 'i2c_generic_scl_recovery':
/kisskb/src/drivers/i2c/i2c-core-base.c:235:5: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/gpu/drm/scheduler/gpu_scheduler.c: In function 'drm_sched_job_recovery':
/kisskb/src/drivers/gpu/drm/scheduler/gpu_scheduler.c:689:20: warning: 'guilty_context' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/pinctrl/intel/pinctrl-cherryview.c: In function 'chv_gpio_probe':
/kisskb/src/drivers/pinctrl/intel/pinctrl-cherryview.c:1644:29: warning: 'irq_base' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/gpu/drm/i915/i915_irq.c: In function 'gen11_irq_handler':
/kisskb/src/drivers/gpu/drm/i915/i915_irq.c:3120:10: warning: 'gu_misc_iir' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/gpu/drm/i915/i915_irq.c:3131:6: note: 'gu_misc_iir' was declared here
/kisskb/src/drivers/gpu/drm/amd/amdgpu/soc15.c: In function 'soc15_set_ip_blocks':
/kisskb/src/drivers/gpu/drm/amd/amdgpu/soc15.c:532:3: warning: #warning "Enable CONFIG_DRM_AMD_DC for display support on SOC15." [-Wcpp]
/kisskb/src/drivers/gpu/drm/amd/amdgpu/soc15.c:551:3: warning: #warning "Enable CONFIG_DRM_AMD_DC for display support on SOC15." [-Wcpp]
/kisskb/src/drivers/gpu/drm/drm_atomic.c: In function 'drm_atomic_connector_check':
/kisskb/src/drivers/gpu/drm/drm_atomic.c:760:38: warning: 'crtc_state' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c: In function 'gmc_v8_0_process_interrupt':
/kisskb/src/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c:1459:10: warning: missing braces around initializer [-Wmissing-braces]
/kisskb/src/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c:1459:10: warning: (near initialization for 'task_info.process_name') [-Wmissing-braces]
In file included from /kisskb/src/drivers/rtc/rtc-da9052.c:21:0:
/kisskb/src/include/linux/mfd/da9052/da9052.h: In function 'da9052_group_read':
/kisskb/src/include/linux/mfd/da9052/da9052.h:157:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c: In function 'gmc_v9_0_process_interrupt':
/kisskb/src/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c:262:10: warning: missing braces around initializer [-Wmissing-braces]
/kisskb/src/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c:262:10: warning: (near initialization for 'task_info.process_name') [-Wmissing-braces]
/kisskb/src/drivers/gpu/drm/radeon/radeon_uvd.c: In function 'radeon_uvd_init':
/kisskb/src/drivers/gpu/drm/radeon/radeon_uvd.c:175:15: warning: 'r' may be used uninitialized in this function [-Wuninitialized]
Completed OK
# rm -rf /kisskb/build/linus-rand_x86_64-randconfig_x86_64
# Build took: 0:00:42.881233