# git rev-parse -q --verify f74fc58f295a45c29b565a898d869034099ca9a1^{commit}
f74fc58f295a45c29b565a898d869034099ca9a1
already have revision, skipping fetch
# git checkout -q -f -B kisskb f74fc58f295a45c29b565a898d869034099ca9a1
# git clean -qxdf
# < git log -1
# commit f74fc58f295a45c29b565a898d869034099ca9a1
# Author: Alexey Kardashevskiy <aik@ozlabs.ru>
# Date:   Thu Jul 18 15:11:39 2019 +1000
# 
#     powerpc/powernv/ioda2: Create bigger default window with 64k IOMMU pages
#     
#     At the moment we create a small window only for 32bit devices, the window
#     maps 0..2GB of the PCI space only. For other devices we either use
#     a sketchy bypass or hardware bypass but the former can only work if
#     the amount of RAM is no bigger than the device's DMA mask and the latter
#     requires devices to support at least 59bit DMA.
#     
#     This extends the default DMA window to the maximum size possible to allow
#     a wider DMA mask than just 32bit. The default window size is now limited
#     by the the iommu_table::it_map allocation bitmap which is a contiguous
#     array, 1 bit per an IOMMU page.
#     
#     This increases the default IOMMU page size from hard coded 4K to
#     the system page size to allow wider DMA masks.
#     
#     This increases the level number to not exceed the max order allocation
#     limit per TCE level. By the same time, this keeps minimal levels number
#     as 2 in order to save memory.
#     
#     As the extended window now overlaps the 32bit MMIO region, this adds
#     an area reservation to iommu_init_table().
#     
#     After this change the default window size is 0x80000000000==1<<43 so
#     devices limited to DMA mask smaller than the amount of system RAM can
#     still use more than just 2GB of memory for DMA.
#     
#     This is an optimization and not a bug fix for DMA API usage.
#     
#     With the on-demand allocation of indirect TCE table levels enabled and
#     2 levels, the first TCE level size is just
#     1<<ceil((log2(0x7ffffffffff+1)-16)/2)=16384 TCEs or 2 system pages.
#     
#     Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20190718051139.74787-5-aik@ozlabs.ru
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-ld --version
# < git log --format=%s --max-count=1 f74fc58f295a45c29b565a898d869034099ca9a1
# < make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  randconfig
KCONFIG_SEED=0xFB796850

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 CONFIG_TRIM_UNUSED_KSYMS=n
# Added to kconfig CONFIG_UBSAN=n
# yes \n | make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  oldconfig
yes: standard output: Broken pipe
# make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  
<stdin>:1511:2: warning: #warning syscall clone3 not implemented [-Wcpp]
In file included from /kisskb/src/arch/powerpc/xmon/xmon.c:63:0:
/kisskb/src/arch/powerpc/xmon/dis-asm.h: In function 'print_insn_powerpc':
/kisskb/src/arch/powerpc/xmon/dis-asm.h:16:2: warning: format '%x' expects argument of type 'unsigned int', but argument 2 has type 'long unsigned int' [-Wformat]
/kisskb/src/arch/powerpc/xmon/dis-asm.h: In function 'print_insn_spu':
/kisskb/src/arch/powerpc/xmon/dis-asm.h:22:2: warning: format '%x' expects argument of type 'unsigned int', but argument 2 has type 'long unsigned int' [-Wformat]
/kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl':
/kisskb/src/kernel/printk/printk.c:194:16: 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:140:32: warning: 'levelspread[<U e60>]' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/rcu/srcutree.c:88:6: note: 'levelspread[<U e60>]' was declared here
/kisskb/src/fs/afs/dir.c: In function 'afs_dir_set_page_dirty':
/kisskb/src/fs/afs/dir.c:50:1: warning: no return statement in function returning non-void [-Wreturn-type]
/kisskb/src/drivers/char/tpm/tpm2-cmd.c: In function 'tpm2_unseal_trusted':
/kisskb/src/drivers/char/tpm/tpm.h:368:9: warning: 'blob_handle' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/char/tpm/tpm2-cmd.c:661:6: note: 'blob_handle' was declared here
/kisskb/src/fs/afs/dynroot.c: In function 'afs_dynroot_lookup':
/kisskb/src/fs/afs/dynroot.c:124:6: warning: 'len' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/afs/dynroot.c:98:6: note: 'len' was declared here
/kisskb/src/drivers/bluetooth/btusb.c: In function 'btusb_mtk_setup':
/kisskb/src/drivers/bluetooth/btusb.c:2902:3: warning: 'dev_id' 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/fs/ocfs2/alloc.c: In function 'ocfs2_trim_mainbm':
/kisskb/src/fs/ocfs2/alloc.c:7590:17: warning: 'first_bit' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/arch/powerpc/kernel/eeh.c:1788:12: warning: 'proc_eeh_show' defined but not used [-Wunused-function]
/kisskb/src/lib/rhashtable.c: In function 'rht_deferred_worker':
/kisskb/src/include/linux/rhashtable.h:110:10: warning: 'next' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/lib/rhashtable.c:222:28: note: 'next' was declared here
/kisskb/src/drivers/lightnvm/core.c: In function 'nvm_ioctl_dev_create.isra.14':
/kisskb/src/include/linux/string.h:280:29: warning: array subscript is above array bounds [-Warray-bounds]
/kisskb/src/drivers/input/mouse/cyapa.c: In function 'cyapa_irq':
/kisskb/src/drivers/input/mouse/cyapa.c:717:27: warning: 'error' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/input/mouse/cyapa_gen3.c: In function 'cyapa_gen3_set_power_mode':
/kisskb/src/drivers/input/mouse/cyapa_gen3.c:927:5: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/udf/unicode.c: In function 'udf_name_conv_char':
/kisskb/src/fs/udf/unicode.c:132:8: warning: 'c' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/misc/cxl/native.c: In function 'native_irq_wait':
/kisskb/src/drivers/misc/cxl/native.c:1244:2: warning: 'ph' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/misc/cxl/native.c:1244:2: warning: 'dsisr' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/md/raid10.c: In function 'read_balance':
/kisskb/src/drivers/md/raid10.c:840:22: warning: 'best_pending_slot' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/mtd/ubi/eba.c: In function 'try_write_vid_and_data':
/kisskb/src/drivers/mtd/ubi/eba.c:988:7: warning: 'opnum' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/net/core/gen_stats.c: In function '__gnet_stats_copy_basic':
/kisskb/src/net/core/gen_stats.c:157:19: warning: 'seq' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/video/backlight/adp8860_bl.c: In function 'adp8860_bl_ambient_light_level_show':
/kisskb/src/drivers/video/backlight/adp8860_bl.c:578:10: warning: 'ret_val' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/nvme/target/io-cmd-bdev.c: In function 'nvmet_bdev_execute_dsm':
/kisskb/src/drivers/nvme/target/io-cmd-bdev.c:271:21: warning: 'status' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/nvme/target/io-cmd-bdev.c:248:6: note: 'status' was declared here
/kisskb/src/net/core/dev.c: In function 'validate_xmit_skb_list':
/kisskb/src/net/core/dev.c:3407:15: warning: 'tail' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/scsi/be2iscsi/be_cmds.c: In function 'beiscsi_check_fw_rdy':
/kisskb/src/drivers/scsi/be2iscsi/be_cmds.c:1634:3: warning: 'post' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/usb/core/devio.c: In function 'async_completed':
/kisskb/src/drivers/usb/core/devio.c:613:23: warning: 'errno' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/md/dm-writecache.c: In function 'persistent_memory_claim':
/kisskb/src/drivers/md/dm-writecache.c:311:1: warning: no return statement in function returning non-void [-Wreturn-type]
/kisskb/src/drivers/md/dm-zoned-metadata.c: In function 'dmz_ctr_metadata':
/kisskb/src/drivers/md/dm-zoned-metadata.c:1343:14: warning: 'dmap' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/md/dm-zoned-metadata.c:1318:18: note: 'dmap' was declared here
/kisskb/src/drivers/usb/misc/usbtest.c: In function 'test_queue':
/kisskb/src/drivers/usb/misc/usbtest.c:2148:1: warning: the frame size of 1280 bytes is larger than 1024 bytes [-Wframe-larger-than=]
/kisskb/src/drivers/usb/serial/cp210x.c: In function 'cp210x_tx_empty':
/kisskb/src/drivers/usb/serial/cp210x.c:879:2: warning: 'count' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/scsi/am53c974.c: In function 'pci_esp_dma_drain':
/kisskb/src/drivers/scsi/am53c974.c:174:5: warning: 'resid' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/scsi/lpfc/lpfc_init.c: In function 'lpfc_create_port':
/kisskb/src/drivers/scsi/lpfc/lpfc_init.c:4268:4: warning: 'wwn' may be used uninitialized in this function [-Wuninitialized]
/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:2237:1: 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:1868:1: warning: the frame size of 1040 bytes is larger than 1024 bytes [-Wframe-larger-than=]
/kisskb/src/drivers/scsi/lpfc/lpfc_bsg.c: In function 'lpfc_issue_ct_rsp_cmp':
/kisskb/src/drivers/scsi/lpfc/lpfc_bsg.c:1468:15: warning: 'bsg_reply' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/net/ethernet/mellanox/mlx5/core/fs_counters.c: In function 'mlx5_fc_stats_work':
/kisskb/src/drivers/net/ethernet/mellanox/mlx5/core/fs_counters.c:116:34: warning: 'counter' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/net/ethernet/mellanox/mlx5/core/fs_counters.c:104:18: note: 'counter' was declared here
/kisskb/src/drivers/usb/serial/ti_usb_3410_5052.c: In function 'ti_tx_empty':
/kisskb/src/drivers/usb/serial/ti_usb_3410_5052.c:874:20: warning: 'lsr' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/net/ethernet/sfc/farch.c: In function 'efx_farch_filter_rfs_expire_one':
/kisskb/src/drivers/net/ethernet/sfc/farch.c:2935:35: warning: 'arfs_id' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/scripts/link-vmlinux.sh: line 62: 27149 Segmentation fault      (core dumped) ${LD} ${KBUILD_LDFLAGS} ${LDFLAGS_vmlinux} -o ${2} -T ${lds} ${objects}
make[1]: *** [/kisskb/src/Makefile:1063: vmlinux] Error 139
make: *** [Makefile:179: sub-make] Error 2
Command 'make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/powerpc-next-rand_powerpc-randconfig_powerpc-gcc4.6
# Build took: 0:01:59.148000