# git rev-parse -q --verify d72caea8a36305609a2802894a44fdd488fdb731^{commit}
d72caea8a36305609a2802894a44fdd488fdb731
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# git checkout -q -f -B kisskb d72caea8a36305609a2802894a44fdd488fdb731
# git clean -qxdf
# git log -1
commit d72caea8a36305609a2802894a44fdd488fdb731
Author: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Date:   Thu Jun 2 17:39:47 2016 +0200

    dma-mapping: Document the DMA attributes right in declaration
    
    Copy documentation abstract about each DMA attribute from
    Documentation/DMA-attributes.txt to the place with declaration.
    
    Suggested-by: Christoph Hellwig <hch@infradead.org>
    Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
    Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /opt/cross/kisskb/gcc-4.9.0-nolibc/aarch64-linux/bin/aarch64-linux-gcc --version
# < git log --format=%s --max-count=1 d72caea8a36305609a2802894a44fdd488fdb731
# < make -j 10 ARCH=arm64 O=/home/kisskb/slave/build/mpe_arm64-defconfig_arm64 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.9.0-nolibc/aarch64-linux/bin/aarch64-linux-  defconfig
# make -j 10 ARCH=arm64 O=/home/kisskb/slave/build/mpe_arm64-defconfig_arm64 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.9.0-nolibc/aarch64-linux/bin/aarch64-linux-  
make[1]: Entering directory '/home/kisskb/slave/build/mpe_arm64-defconfig_arm64'
  GEN     ./Makefile
scripts/kconfig/conf  --silentoldconfig Kconfig
  CHK     include/config/kernel.release
  GEN     ./Makefile
  WRAP    arch/arm64/include/generated/asm/bug.h
  WRAP    arch/arm64/include/generated/asm/bugs.h
  WRAP    arch/arm64/include/generated/asm/checksum.h
  WRAP    arch/arm64/include/generated/asm/clkdev.h
  WRAP    arch/arm64/include/generated/asm/current.h
  WRAP    arch/arm64/include/generated/asm/delay.h
  WRAP    arch/arm64/include/generated/asm/div64.h
  WRAP    arch/arm64/include/generated/asm/cputime.h
  WRAP    arch/arm64/include/generated/asm/dma.h
  WRAP    arch/arm64/include/generated/asm/early_ioremap.h
  WRAP    arch/arm64/include/generated/asm/dma-contiguous.h
  WRAP    arch/arm64/include/generated/asm/ftrace.h
  WRAP    arch/arm64/include/generated/asm/emergency-restart.h
  WRAP    arch/arm64/include/generated/asm/hw_irq.h
  WRAP    arch/arm64/include/generated/asm/ioctl.h
  WRAP    arch/arm64/include/generated/asm/errno.h
  WRAP    arch/arm64/include/generated/asm/ioctls.h
  WRAP    arch/arm64/include/generated/asm/ipcbuf.h
  WRAP    arch/arm64/include/generated/asm/irq_regs.h
  WRAP    arch/arm64/include/generated/asm/kmap_types.h
  WRAP    arch/arm64/include/generated/asm/kdebug.h
  WRAP    arch/arm64/include/generated/asm/kvm_para.h
  WRAP    arch/arm64/include/generated/asm/local.h
  CHK     include/generated/uapi/linux/version.h
  WRAP    arch/arm64/include/generated/asm/local64.h
  WRAP    arch/arm64/include/generated/asm/mcs_spinlock.h
  WRAP    arch/arm64/include/generated/asm/mm-arch-hooks.h
  WRAP    arch/arm64/include/generated/asm/mman.h
  WRAP    arch/arm64/include/generated/asm/msgbuf.h
  WRAP    arch/arm64/include/generated/asm/msi.h
  UPD     include/generated/uapi/linux/version.h
  WRAP    arch/arm64/include/generated/asm/mutex.h
  WRAP    arch/arm64/include/generated/asm/poll.h
  WRAP    arch/arm64/include/generated/asm/pci.h
  WRAP    arch/arm64/include/generated/asm/preempt.h
  WRAP    arch/arm64/include/generated/asm/resource.h
  WRAP    arch/arm64/include/generated/asm/rwsem.h
  WRAP    arch/arm64/include/generated/asm/sections.h
  UPD     include/config/kernel.release
  WRAP    arch/arm64/include/generated/asm/segment.h
  WRAP    arch/arm64/include/generated/asm/sembuf.h
  WRAP    arch/arm64/include/generated/asm/serial.h
  WRAP    arch/arm64/include/generated/asm/shmbuf.h
  WRAP    arch/arm64/include/generated/asm/simd.h
  WRAP    arch/arm64/include/generated/asm/sizes.h
  WRAP    arch/arm64/include/generated/asm/socket.h
  WRAP    arch/arm64/include/generated/asm/sockios.h
  WRAP    arch/arm64/include/generated/asm/swab.h
  WRAP    arch/arm64/include/generated/asm/switch_to.h
  WRAP    arch/arm64/include/generated/asm/termbits.h
  WRAP    arch/arm64/include/generated/asm/termios.h
  WRAP    arch/arm64/include/generated/asm/topology.h
  WRAP    arch/arm64/include/generated/asm/trace_clock.h
  WRAP    arch/arm64/include/generated/asm/types.h
  WRAP    arch/arm64/include/generated/asm/unaligned.h
  WRAP    arch/arm64/include/generated/asm/user.h
  WRAP    arch/arm64/include/generated/asm/vga.h
  WRAP    arch/arm64/include/generated/asm/xor.h
  HOSTCC  scripts/basic/bin2c
  WRAP    arch/arm64/include/generated/uapi/asm/kvm_para.h
  Using /home/kisskb/slave/src as source for kernel
  CHK     include/generated/utsrelease.h
  UPD     include/generated/utsrelease.h
  HOSTCC  scripts/dtc/dtc.o
  HOSTCC  scripts/dtc/flattree.o
  HOSTCC  scripts/dtc/fstree.o
  HOSTCC  scripts/kallsyms
  HOSTCC  scripts/dtc/data.o
  CC      scripts/mod/empty.o
  HOSTCC  scripts/dtc/livetree.o
  HOSTCC  scripts/mod/mk_elfconfig
  HOSTCC  scripts/pnmtologo
  HOSTCC  scripts/dtc/treesource.o
  CC      scripts/mod/devicetable-offsets.s
  HOSTCC  scripts/dtc/srcpos.o
  MKELF   scripts/mod/elfconfig.h
  GEN     scripts/mod/devicetable-offsets.h
  HOSTCC  scripts/mod/sumversion.o
  HOSTCC  scripts/conmakehash
  HOSTCC  scripts/dtc/checks.o
  HOSTCC  scripts/sortextable
  CC      kernel/bounds.s
  CHK     include/generated/timeconst.h
  UPD     include/generated/timeconst.h
  HOSTCC  scripts/dtc/util.o
  CHK     include/generated/bounds.h
  SHIPPED scripts/dtc/dtc-lexer.lex.c
  SHIPPED scripts/dtc/dtc-parser.tab.h
  SHIPPED scripts/dtc/dtc-parser.tab.c
  UPD     include/generated/bounds.h
  HOSTCC  scripts/dtc/dtc-lexer.lex.o
  CC      arch/arm64/kernel/asm-offsets.s
  HOSTCC  scripts/dtc/dtc-parser.tab.o
  HOSTCC  scripts/mod/modpost.o
  HOSTCC  scripts/mod/file2alias.o
  CHK     include/generated/asm-offsets.h
  HOSTLD  scripts/dtc/dtc
  UPD     include/generated/asm-offsets.h
  CALL    /home/kisskb/slave/src/scripts/checksyscalls.sh
  HOSTLD  scripts/mod/modpost
  HOSTCC  usr/gen_init_cpio
  CC      init/main.o
  CC      init/do_mounts.o
  CC      init/do_mounts_initrd.o
  CHK     include/generated/compile.h
  CC      init/initramfs.o
  CC      init/calibrate.o
  CC      init/init_task.o
  UPD     include/generated/compile.h
  CC      arch/arm64/mm/dma-mapping.o
  CC      arch/arm64/net/bpf_jit_comp.o
  LDS     arch/arm64/kernel/vdso/vdso.lds
  VDSOA   arch/arm64/kernel/vdso/gettimeofday.o
  VDSOA   arch/arm64/kernel/vdso/note.o
  VDSOA   arch/arm64/kernel/vdso/sigreturn.o
  CC      init/version.o
  VDSOL   arch/arm64/kernel/vdso/vdso.so.dbg
  OBJCOPY arch/arm64/kernel/vdso/vdso.so
  VDSOSYM arch/arm64/kernel/vdso/vdso-offsets.h
  AS      arch/arm64/kernel/vdso/vdso.o
  LD      arch/arm64/kernel/vdso/built-in.o
  AS      arch/arm64/kernel/efi-entry.o
  GEN     usr/initramfs_data.cpio.gz
  AS      arch/arm64/kernel/head.o
  AS      usr/initramfs_data.o
  LD      usr/built-in.o
  LDS     arch/arm64/kernel/vmlinux.lds
  CC      arch/arm64/kernel/debug-monitors.o
  CC      arch/arm64/kvm/../../../virt/kvm/kvm_main.o
  CC      arch/arm64/kvm/../../../virt/kvm/coalesced_mmio.o
/home/kisskb/slave/src/arch/arm64/mm/dma-mapping.c: In function '__iommu_unmap_page':
/home/kisskb/slave/src/arch/arm64/mm/dma-mapping.c:715:13: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
  if ((attrs & DMA_ATTR_SKIP_CPU_SYNC == 0)
             ^
/home/kisskb/slave/src/arch/arm64/mm/dma-mapping.c:716:3: error: expected ')' before '__iommu_sync_single_for_cpu'
   __iommu_sync_single_for_cpu(dev, dev_addr, size, dir);
   ^
/home/kisskb/slave/src/arch/arm64/mm/dma-mapping.c:719:1: error: expected expression before '}' token
 }
 ^
/home/kisskb/slave/src/arch/arm64/mm/dma-mapping.c: In function '__iommu_map_sg_attrs':
/home/kisskb/slave/src/arch/arm64/mm/dma-mapping.c:755:13: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
  if ((attrs & DMA_ATTR_SKIP_CPU_SYNC == 0)
             ^
/home/kisskb/slave/src/arch/arm64/mm/dma-mapping.c:756:3: error: expected ')' before '__iommu_sync_sg_for_device'
   __iommu_sync_sg_for_device(dev, sgl, nelems, dir);
   ^
/home/kisskb/slave/src/arch/arm64/mm/dma-mapping.c:760:1: error: expected expression before '}' token
 }
 ^
/home/kisskb/slave/src/arch/arm64/mm/dma-mapping.c:753:7: warning: unused variable 'coherent' [-Wunused-variable]
  bool coherent = is_device_dma_coherent(dev);
       ^
/home/kisskb/slave/src/arch/arm64/mm/dma-mapping.c:760:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^
/home/kisskb/slave/src/arch/arm64/mm/dma-mapping.c: In function '__iommu_unmap_sg_attrs':
/home/kisskb/slave/src/arch/arm64/mm/dma-mapping.c:767:13: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
  if ((attrs & DMA_ATTR_SKIP_CPU_SYNC == 0)
             ^
/home/kisskb/slave/src/arch/arm64/mm/dma-mapping.c:768:3: error: expected ')' before '__iommu_sync_sg_for_cpu'
   __iommu_sync_sg_for_cpu(dev, sgl, nelems, dir);
   ^
/home/kisskb/slave/src/arch/arm64/mm/dma-mapping.c:771:1: error: expected expression before '}' token
 }
 ^
/home/kisskb/slave/src/scripts/Makefile.build:289: recipe for target 'arch/arm64/mm/dma-mapping.o' failed
make[2]: *** [arch/arm64/mm/dma-mapping.o] Error 1
/home/kisskb/slave/src/Makefile:985: recipe for target 'arch/arm64/mm' failed
make[1]: *** [arch/arm64/mm] Error 2
make[1]: *** Waiting for unfinished jobs....
  AS      arch/arm64/kernel/entry.o
  CC      arch/arm64/kvm/../../../virt/kvm/eventfd.o
  CC      arch/arm64/kvm/../../../virt/kvm/vfio.o
  CC      arch/arm64/kernel/irq.o
  CC      arch/arm64/kernel/fpsimd.o
  AS      arch/arm64/kernel/entry-fpsimd.o
  CC      arch/arm64/kernel/process.o
  CC      arch/arm64/kvm/../../../arch/arm/kvm/arm.o
  CC      arch/arm64/kernel/ptrace.o
  CC      arch/arm64/kvm/../../../arch/arm/kvm/mmu.o
  LD      init/mounts.o
  LD      init/built-in.o
  CC      arch/arm64/kvm/../../../arch/arm/kvm/mmio.o
  CC      arch/arm64/kvm/../../../arch/arm/kvm/psci.o
  CC      arch/arm64/kernel/setup.o
  CC      arch/arm64/kvm/../../../arch/arm/kvm/perf.o
  CC      arch/arm64/kvm/emulate.o
  LD      arch/arm64/net/built-in.o
  CC      arch/arm64/kvm/inject_fault.o
  CC      arch/arm64/kvm/regmap.o
  CC      arch/arm64/kernel/signal.o
  CC      arch/arm64/kernel/sys.o
  AS      arch/arm64/kvm/hyp.o
  AS      arch/arm64/kvm/hyp-init.o
  CC      arch/arm64/kvm/handle_exit.o
  CC      arch/arm64/kernel/stacktrace.o
  CC      arch/arm64/kernel/time.o
  CC      arch/arm64/kvm/guest.o
  CC      arch/arm64/kvm/debug.o
  CC      arch/arm64/kvm/reset.o
  CC      arch/arm64/kernel/traps.o
  CC      arch/arm64/kernel/io.o
  CC      arch/arm64/kernel/vdso.o
  CC      arch/arm64/kvm/sys_regs.o
  AS      arch/arm64/kernel/hyp-stub.o
  CC      arch/arm64/kvm/sys_regs_generic_v8.o
  CC      arch/arm64/kernel/psci.o
  CC      arch/arm64/kernel/cpu_ops.o
  CC      arch/arm64/kernel/insn.o
  CC      arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic.o
  CC      arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic-init.o
  CC      arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic-irqfd.o
  CC      arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic-v2.o
  CC      arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic-v3.o
  CC      arch/arm64/kernel/return_address.o
  CC      arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic-mmio.o
  CC      arch/arm64/kernel/cpuinfo.o
  CC      arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic-mmio-v2.o
  CC      arch/arm64/kernel/cpu_errata.o
  CC      arch/arm64/kernel/alternative.o
  CC      arch/arm64/kernel/cpufeature.o
  CC      arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic-mmio-v3.o
  CC      arch/arm64/kvm/../../../virt/kvm/arm/vgic/vgic-kvm-device.o
  CC      arch/arm64/kvm/../../../virt/kvm/arm/arch_timer.o
  CC      arch/arm64/kvm/../../../virt/kvm/arm/pmu.o
  CC      arch/arm64/kernel/cacheinfo.o
  CC      arch/arm64/kernel/smp.o
  CC      arch/arm64/kernel/smp_spin_table.o
  CC      arch/arm64/kernel/topology.o
  CC      arch/arm64/kvm/hyp/../../../../virt/kvm/arm/hyp/vgic-v2-sr.o
  AS      arch/arm64/kernel/smccc-call.o
  CC      arch/arm64/kernel/sys32.o
  AS      arch/arm64/kernel/kuser32.o
  CC      arch/arm64/kernel/signal32.o
  CC      arch/arm64/kernel/sys_compat.o
  AS      arch/arm64/kernel/entry32.o
  CC      arch/arm64/kernel/../../arm/kernel/opcodes.o
  CC      arch/arm64/kernel/arm64ksyms.o
  CC      arch/arm64/kernel/module.o
  CC      arch/arm64/kvm/hyp/../../../../virt/kvm/arm/hyp/timer-sr.o
  CC      arch/arm64/kvm/hyp/vgic-v3-sr.o
  CC      arch/arm64/kvm/hyp/sysreg-sr.o
  CC      arch/arm64/kvm/hyp/debug-sr.o
  CC      arch/arm64/kernel/perf_regs.o
  CC      arch/arm64/kernel/perf_callchain.o
  LD      arch/arm64/kvm/kvm.o
  CC      arch/arm64/kernel/perf_event.o
  CC      arch/arm64/kernel/hw_breakpoint.o
  AS      arch/arm64/kernel/sleep.o
  CC      arch/arm64/kernel/suspend.o
  AS      arch/arm64/kvm/hyp/entry.o
  CC      arch/arm64/kvm/hyp/switch.o
  AS      arch/arm64/kvm/hyp/fpsimd.o
  CC      arch/arm64/kernel/cpuidle.o
  CC      arch/arm64/kvm/hyp/tlb.o
  AS      arch/arm64/kvm/hyp/hyp-entry.o
  CC      arch/arm64/kvm/hyp/s2-setup.o
  CC      arch/arm64/kernel/jump_label.o
  CC      arch/arm64/kernel/efi.o
  OBJCOPY arch/arm64/kernel/efi-entry.stub.o
  CC      arch/arm64/kernel/pci.o
  CC      arch/arm64/kernel/acpi.o
  CC      arch/arm64/kernel/paravirt.o
  LD      arch/arm64/kvm/hyp/built-in.o
  LD      arch/arm64/kvm/built-in.o
  LD      arch/arm64/kernel/built-in.o
make[1]: Leaving directory '/home/kisskb/slave/build/mpe_arm64-defconfig_arm64'
Makefile:150: recipe for target 'sub-make' failed
make: *** [sub-make] Error 2
Command 'make -j 10 ARCH=arm64 O=/home/kisskb/slave/build/mpe_arm64-defconfig_arm64 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.9.0-nolibc/aarch64-linux/bin/aarch64-linux-  ' returned non-zero exit status 2
# rm -rf /home/kisskb/slave/build/mpe_arm64-defconfig_arm64
# Build took: 0:00:12.241161