# git rev-parse -q --verify 62906027091f1d02de44041524f0769f60bb9cf3^{commit}
62906027091f1d02de44041524f0769f60bb9cf3
already have revision, skipping fetch
# git checkout -q -f -B kisskb 62906027091f1d02de44041524f0769f60bb9cf3
# git clean -qxdf
# git log -1
commit 62906027091f1d02de44041524f0769f60bb9cf3
Author: Nicholas Piggin <npiggin@gmail.com>
Date:   Sun Dec 25 13:00:30 2016 +1000

    mm: add PageWaiters indicating tasks are waiting for a page bit
    
    Add a new page flag, PageWaiters, to indicate the page waitqueue has
    tasks waiting. This can be tested rather than testing waitqueue_active
    which requires another cacheline load.
    
    This bit is always set when the page has tasks on page_waitqueue(page),
    and is set and cleared under the waitqueue lock. It may be set when
    there are no tasks on the waitqueue, which will cause a harmless extra
    wakeup check that will clears the bit.
    
    The generic bit-waitqueue infrastructure is no longer used for pages.
    Instead, waitqueues are used directly with a custom key type. The
    generic code was not flexible enough to have PageWaiters manipulation
    under the waitqueue lock (which simplifies concurrency).
    
    This improves the performance of page lock intensive microbenchmarks by
    2-3%.
    
    Putting two bits in the same word opens the opportunity to remove the
    memory barrier between clearing the lock bit and testing the waiters
    bit, after some work on the arch primitives (e.g., ensuring memory
    operand widths match and cover both bits).
    
    Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
    Cc: Dave Hansen <dave.hansen@linux.intel.com>
    Cc: Bob Peterson <rpeterso@redhat.com>
    Cc: Steven Whitehouse <swhiteho@redhat.com>
    Cc: Andrew Lutomirski <luto@kernel.org>
    Cc: Andreas Gruenbacher <agruenba@redhat.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Mel Gorman <mgorman@techsingularity.net>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/br-sh4-full-2016.08-613-ge98b4dd/bin/sh4-linux-gcc --version
# < git log --format=%s --max-count=1 62906027091f1d02de44041524f0769f60bb9cf3
# < make -j 10 ARCH=sh O=/home/kisskb/slave/build/linus_edosk7705_defconfig_sh4 CROSS_COMPILE=/opt/cross/kisskb/br-sh4-full-2016.08-613-ge98b4dd/bin/sh4-linux-  edosk7705_defconfig
# make -j 10 ARCH=sh O=/home/kisskb/slave/build/linus_edosk7705_defconfig_sh4 CROSS_COMPILE=/opt/cross/kisskb/br-sh4-full-2016.08-613-ge98b4dd/bin/sh4-linux-  
make[1]: Entering directory '/home/kisskb/slave/build/linus_edosk7705_defconfig_sh4'
  GEN     ./Makefile
scripts/kconfig/conf  --silentoldconfig Kconfig
  CHK     include/config/kernel.release
  UPD     include/config/kernel.release
  GEN     ./Makefile
  WRAP    arch/sh/include/generated/asm/clkdev.h
  WRAP    arch/sh/include/generated/asm/bitsperlong.h
  WRAP    arch/sh/include/generated/asm/cputime.h
  WRAP    arch/sh/include/generated/asm/delay.h
  WRAP    arch/sh/include/generated/asm/div64.h
  WRAP    arch/sh/include/generated/asm/emergency-restart.h
  WRAP    arch/sh/include/generated/asm/errno.h
  WRAP    arch/sh/include/generated/asm/exec.h
  WRAP    arch/sh/include/generated/asm/current.h
  WRAP    arch/sh/include/generated/asm/fcntl.h
  WRAP    arch/sh/include/generated/asm/ioctl.h
  WRAP    arch/sh/include/generated/asm/ipcbuf.h
  WRAP    arch/sh/include/generated/asm/irq_regs.h
  WRAP    arch/sh/include/generated/asm/irq_work.h
  WRAP    arch/sh/include/generated/asm/kvm_para.h
  WRAP    arch/sh/include/generated/asm/local.h
  WRAP    arch/sh/include/generated/asm/local64.h
  WRAP    arch/sh/include/generated/asm/mcs_spinlock.h
  WRAP    arch/sh/include/generated/asm/mm-arch-hooks.h
  WRAP    arch/sh/include/generated/asm/mman.h
  WRAP    arch/sh/include/generated/asm/msgbuf.h
  WRAP    arch/sh/include/generated/asm/param.h
  WRAP    arch/sh/include/generated/asm/parport.h
  WRAP    arch/sh/include/generated/asm/percpu.h
  WRAP    arch/sh/include/generated/asm/poll.h
  WRAP    arch/sh/include/generated/asm/preempt.h
  WRAP    arch/sh/include/generated/asm/resource.h
  WRAP    arch/sh/include/generated/asm/rwsem.h
  WRAP    arch/sh/include/generated/asm/sembuf.h
  WRAP    arch/sh/include/generated/asm/serial.h
  WRAP    arch/sh/include/generated/asm/shmbuf.h
  WRAP    arch/sh/include/generated/asm/siginfo.h
  WRAP    arch/sh/include/generated/asm/sizes.h
  WRAP    arch/sh/include/generated/asm/socket.h
  WRAP    arch/sh/include/generated/asm/statfs.h
  WRAP    arch/sh/include/generated/asm/termbits.h
  WRAP    arch/sh/include/generated/asm/termios.h
  WRAP    arch/sh/include/generated/asm/trace_clock.h
  WRAP    arch/sh/include/generated/asm/ucontext.h
  WRAP    arch/sh/include/generated/asm/xor.h
  CHK     include/generated/uapi/linux/version.h
  UPD     include/generated/uapi/linux/version.h
  CHK     include/generated/utsrelease.h
  UPD     include/generated/utsrelease.h
  Using /home/kisskb/slave/src as source for kernel
  HOSTCC  scripts/kallsyms
  HOSTCC  scripts/conmakehash
  CC      scripts/mod/empty.o
  HOSTCC  scripts/mod/mk_elfconfig
  CC      scripts/mod/devicetable-offsets.s
  GEN     scripts/mod/devicetable-offsets.h
  MKELF   scripts/mod/elfconfig.h
  HOSTCC  scripts/mod/modpost.o
  HOSTCC  scripts/mod/file2alias.o
  HOSTCC  scripts/mod/sumversion.o
  HOSTLD  scripts/mod/modpost
  Generating include/generated/machtypes.h
  CHK     include/generated/timeconst.h
  CC      kernel/bounds.s
  UPD     include/generated/timeconst.h
  CHK     include/generated/bounds.h
  UPD     include/generated/bounds.h
  CC      arch/sh/kernel/asm-offsets.s
  CHK     include/generated/asm-offsets.h
  UPD     include/generated/asm-offsets.h
  CALL    /home/kisskb/slave/src/scripts/checksyscalls.sh
<stdin>:1316:2: warning: #warning syscall pkey_mprotect not implemented [-Wcpp]
<stdin>:1319:2: warning: #warning syscall pkey_alloc not implemented [-Wcpp]
<stdin>:1322:2: warning: #warning syscall pkey_free not implemented [-Wcpp]
  CC      init/main.o
  CHK     include/generated/compile.h
  CC      init/do_mounts.o
  CC      init/noinitramfs.o
  CC      init/init_task.o
  UPD     include/generated/compile.h
  LD      usr/built-in.o
  CC      init/version.o
  AS      arch/sh/kernel/debugtraps.o
  CC      arch/sh/kernel/dma-nommu.o
  CC      arch/sh/kernel/dumpstack.o
  CC      arch/sh/kernel/idle.o
  CC      arch/sh/mm/alignment.o
  CC      arch/sh/boards/board-edosk7705.o
  CC      arch/sh/kernel/io.o
  CC      arch/sh/mm/cache.o
  CC      arch/sh/mm/init.o
  LD      arch/sh/boards/built-in.o
  CC      arch/sh/kernel/irq.o
  CC      arch/sh/kernel/irq_32.o
  CC      arch/sh/kernel/kdebugfs.o
  CC      kernel/fork.o
  CC      kernel/exec_domain.o
  CC      arch/sh/kernel/machvec.o
  CC      arch/sh/mm/consistent.o
  CC      kernel/panic.o
  CC      kernel/cpu.o
  CC      arch/sh/kernel/nmi_debug.o
  CC      arch/sh/mm/mmap.o
  CC      arch/sh/kernel/process.o
  LD      certs/built-in.o
  CC      arch/sh/mm/cache-sh3.o
  CC      mm/filemap.o
  LD      init/mounts.o
  LD      init/built-in.o
  CC      arch/sh/kernel/process_32.o
  CC      arch/sh/kernel/ptrace.o
  CC      arch/sh/kernel/ptrace_32.o
  CC      kernel/exit.o
  CC      arch/sh/mm/cache-sh7705.o
  CC      fs/open.o
  CC      mm/mempool.o
  CC      mm/oom_kill.o
  CC      mm/maccess.o
  CC      mm/page_alloc.o
  CC      arch/sh/kernel/reboot.o
  CC      arch/sh/kernel/return_address.o
  CC      arch/sh/mm/extable_32.o
  CC      fs/read_write.o
  CC      fs/file_table.o
  CC      fs/super.o
  CC      arch/sh/kernel/setup.o
  CC      arch/sh/mm/fault.o
  CC      arch/sh/mm/gup.o
  CC      arch/sh/kernel/signal_32.o
  CC      arch/sh/kernel/sys_sh.o
  AS      arch/sh/kernel/syscalls_32.o
  CC      kernel/softirq.o
  CC      kernel/resource.o
  CC      kernel/sysctl.o
  CC      arch/sh/mm/ioremap.o
  CC      kernel/sysctl_binary.o
  CC      kernel/capability.o
  CC      arch/sh/mm/kmap.o
  CC      arch/sh/mm/pgtable.o
  CC      arch/sh/kernel/time.o
  CC      fs/char_dev.o
  CC      kernel/ptrace.o
  CC      mm/page-writeback.o
  CC      kernel/user.o
  CC      arch/sh/mm/tlbex_32.o
  CC      kernel/signal.o
  CC      arch/sh/kernel/topology.o
  CC      arch/sh/kernel/traps.o
  CC      arch/sh/kernel/traps_32.o
  CC      arch/sh/kernel/unwinder.o
  CC      arch/sh/mm/tlbflush_32.o
  CC      fs/stat.o
  CC      arch/sh/mm/tlb-sh3.o
  CC      kernel/sys.o
  CC      arch/sh/kernel/iomap.o
  CC      arch/sh/mm/uncached.o
  CC      kernel/kmod.o
  CC      fs/exec.o
  CC      kernel/workqueue.o
  CC      arch/sh/kernel/sys_sh32.o
  LD      arch/sh/mm/built-in.o
  CC      arch/sh/kernel/cpu/irq/imask.o
  CC      fs/pipe.o
  CC      kernel/pid.o
  LD      arch/sh/kernel/cpu/irq/built-in.o
  AS      arch/sh/kernel/cpu/sh3/ex.o
  CC      arch/sh/kernel/vsyscall/vsyscall.o
  CC      arch/sh/kernel/cpu/sh3/probe.o
  LDS     arch/sh/kernel/vsyscall/vsyscall.lds
  CC      arch/sh/kernel/cpu/adc.o
  AS      arch/sh/kernel/cpu/sh3/entry.o
/home/kisskb/slave/src/arch/sh/kernel/cpu/sh3/../../entry-common.S: Assembler messages:
/home/kisskb/slave/src/arch/sh/kernel/cpu/sh3/../../entry-common.S:389: Warning: overflow in branch to syscall_exit_work; converted into longer instruction sequence
/home/kisskb/slave/src/arch/sh/kernel/cpu/sh3/../../entry-common.S:392: Warning: overflow in branch to syscall_exit_work; converted into longer instruction sequence
  CC      arch/sh/kernel/cpu/sh3/setup-sh3.o
  CC      mm/readahead.o
  CC      arch/sh/kernel/cpu/clock-cpg.o
  AS      arch/sh/kernel/vsyscall/vsyscall-trapa.o
  CC      arch/sh/kernel/cpu/sh3/setup-sh7705.o
  AS      arch/sh/kernel/vsyscall/vsyscall-note.o
  CC      arch/sh/kernel/cpu/sh3/serial-sh770x.o
  SYSCALL arch/sh/kernel/vsyscall/vsyscall-trapa.so
  SYSCALL arch/sh/kernel/vsyscall/vsyscall-syms.o
  AS      arch/sh/kernel/vsyscall/vsyscall-syscall.o
  LD      arch/sh/kernel/vsyscall/built-in.o
  CC      arch/sh/kernel/cpu/init.o
  CC      arch/sh/kernel/cpu/clock.o
  CC      kernel/task_work.o
  CC      fs/namei.o
  CC      fs/fcntl.o
  CC      fs/ioctl.o
  CC      fs/readdir.o
  CC      fs/select.o
  CC      arch/sh/kernel/cpu/sh3/clock-sh7705.o
  CC      mm/swap.o
  CC      arch/sh/kernel/cpu/fpu.o
  CC      mm/truncate.o
  LD      arch/sh/kernel/cpu/sh3/built-in.o
  CC      mm/vmscan.o
  CC      arch/sh/kernel/cpu/pfc.o
  CC      arch/sh/kernel/cpu/proc.o
  LD      ipc/built-in.o
  CC      fs/dcache.o
  CC      arch/sh/kernel/perf_event.o
  CC      security/commoncap.o
  LD      arch/sh/kernel/cpu/built-in.o
  CC      kernel/extable.o
  CC      kernel/params.o
  CC      mm/shmem.o
  CC      kernel/kthread.o
  CC      arch/sh/kernel/perf_callchain.o
  CC      arch/sh/kernel/hw_breakpoint.o
  CC      fs/inode.o
  CC      fs/attr.o
  CC      fs/bad_inode.o
  CC      security/min_addr.o
  AS      arch/sh/kernel/head_32.o
  LDS     arch/sh/kernel/vmlinux.lds
  LD      arch/sh/kernel/built-in.o
  CC      kernel/sys_ni.o
  CC      kernel/nsproxy.o
  LD      crypto/built-in.o
  CC      kernel/notifier.o
  CC      fs/file.o
  LD      security/built-in.o
  CC      fs/filesystems.o
  CC      block/bio.o
  CC      block/elevator.o
  CC      block/blk-core.o
  CC      block/blk-tag.o
  CC      kernel/ksysfs.o
  CC      kernel/cred.o
  CC      mm/util.o
  CC      block/blk-sysfs.o
  CC      block/blk-flush.o
  CC      fs/namespace.o
  CC      fs/seq_file.o
  LD      drivers/amba/built-in.o
  LD      drivers/auxdisplay/built-in.o
  CC      drivers/base/component.o
  CC      block/blk-settings.o
  CC      mm/mmzone.o
  CC      kernel/reboot.o
  CC      kernel/async.o
  CC      kernel/range.o
  CC      kernel/smpboot.o
  CC      mm/vmstat.o
  CC      drivers/base/core.o
  CC      drivers/base/bus.o
  CC      fs/xattr.o
  LD      sound/built-in.o
  LD      firmware/built-in.o
  CC      kernel/ucount.o
  LD      arch/sh/drivers/dma/built-in.o
  LD      arch/sh/drivers/built-in.o
  CC      kernel/groups.o
  CC      drivers/base/dd.o
  CC      drivers/base/syscore.o
  CC      block/blk-ioc.o
  CC      mm/backing-dev.o
  CC      block/blk-map.o
  CC      block/blk-exec.o
  CC      block/blk-merge.o
  CC      block/blk-softirq.o
  CC      kernel/events/core.o
  CC      block/blk-timeout.o
  CC      block/blk-lib.o
  CC      fs/libfs.o
  CC      block/blk-mq.o
  CC      mm/mm_init.o
  LD      net/built-in.o
  CC      mm/mmu_context.o
  CC      kernel/irq/irqdesc.o
  CC      kernel/irq/handle.o
  CC      drivers/base/driver.o
  CC      kernel/irq/manage.o
  CC      mm/percpu.o
  CC      kernel/irq/spurious.o
  CC      kernel/irq/resend.o
  CC      drivers/base/class.o
  CC      drivers/base/platform.o
  AS      arch/sh/lib/movmem.o
  CC      arch/sh/lib/ashldi3.o
  CC      fs/fs-writeback.o
  CC      fs/pnode.o
  CC      block/blk-mq-tag.o
  CC      arch/sh/lib/ashrdi3.o
  CC      drivers/base/cpu.o
  CC      arch/sh/lib/lshrdi3.o
  AS      arch/sh/lib/ashlsi3.o
  CC      block/blk-stat.o
  AS      arch/sh/lib/ashrsi3.o
  AS      arch/sh/lib/ashiftrt.o
  AS      arch/sh/lib/lshrsi3.o
  CC      drivers/base/firmware.o
  AS      arch/sh/lib/udiv_qrnnd.o
  CC      drivers/base/init.o
  CC      arch/sh/lib/io.o
  CC      kernel/irq/chip.o
  CC      drivers/base/map.o
  CC      drivers/base/devres.o
  CC      kernel/irq/dummychip.o
  CC      mm/slab_common.o
  CC      mm/compaction.o
  AS      arch/sh/lib/__clear_user.o
  AS      arch/sh/lib/checksum.o
  AS      arch/sh/lib/copy_page.o
  CC      arch/sh/lib/delay.o
  CC      fs/splice.o
  CC      drivers/base/attribute_container.o
  CC      block/blk-mq-sysfs.o
  CC      arch/sh/lib/div64-generic.o
  AS      arch/sh/lib/div64.o
  AS      arch/sh/lib/memchr.o
  AS      arch/sh/lib/memcpy.o
  CC      mm/vmacache.o
  AS      arch/sh/lib/memmove.o
  AS      arch/sh/lib/memset.o
  AS      arch/sh/lib/strlen.o
  AS      arch/sh/lib/udivsi3.o
  CC      fs/sync.o
  AS      arch/sh/lib/udivsi3_i4i.o
  AR      arch/sh/lib/lib.a
  EXPORTS arch/sh/lib/lib-ksyms.o
  CC      kernel/irq/devres.o
  LD      arch/sh/lib/built-in.o
  CC      kernel/irq/irqdomain.o
  CC      kernel/irq/proc.o
  CC      drivers/base/transport_class.o
  CC      drivers/base/topology.o
  CC      drivers/base/container.o
  LD      drivers/block/built-in.o
  LD      kernel/livepatch/built-in.o
  CC      block/blk-mq-cpumap.o
  CC      lib/lockref.o
  CC      lib/bcd.o
  CC      lib/div64.o
  CC      drivers/base/property.o
  CC      fs/utimes.o
  CC      drivers/base/cacheinfo.o
  LD      kernel/irq/built-in.o
  CC      fs/stack.o
  CC      fs/fs_struct.o
  CC      block/ioctl.o
  CC      mm/interval_tree.o
  CC      block/genhd.o
  CC      lib/sort.o
  CC      lib/parser.o
  CC      lib/halfmd4.o
  CC      fs/statfs.o
  CC      fs/fs_pin.o
  CC      fs/nsfs.o
  LD      virt/lib/built-in.o
  LD      virt/built-in.o
  CC      drivers/base/power/clock_ops.o
  CC      lib/debug_locks.o
  CC      mm/list_lru.o
  CC      lib/random32.o
  CC      kernel/locking/mutex.o
  CC      kernel/locking/semaphore.o
  CC      kernel/locking/rwsem.o
  CC      kernel/locking/percpu-rwsem.o
  CC      fs/buffer.o
  LD      drivers/base/power/built-in.o
  LD      drivers/base/test/built-in.o
  CC      kernel/events/ring_buffer.o
  CC      drivers/base/dma-mapping.o
  CC      lib/bust_spinlocks.o
  CC      lib/kasprintf.o
  CC      lib/bitmap.o
  CC      mm/workingset.o
  CC      block/scsi_ioctl.o
  CC      kernel/locking/rtmutex.o
  LD      drivers/bus/built-in.o
  CC      kernel/locking/rwsem-spinlock.o
  CC      fs/block_dev.o
  CC      drivers/base/dma-coherent.o
  CC      drivers/base/firmware_class.o
  CC      lib/scatterlist.o
  CC      mm/debug.o
  CC      kernel/events/callchain.o
  CC      lib/gcd.o
  CC      mm/gup.o
  CC      lib/lcm.o
  CC      block/partition-generic.o
  CC      lib/list_sort.o
  LD      kernel/locking/built-in.o
  CC      lib/uuid.o
  CC      kernel/events/hw_breakpoint.o
  CC      block/ioprio.o
  LD      drivers/base/built-in.o
  CC      block/badblocks.o
  LD      drivers/cdrom/built-in.o
  CC      mm/highmem.o
  CC      drivers/char/mem.o
  CC      lib/flex_array.o
  CC      lib/iov_iter.o
  LD      kernel/events/built-in.o
  CC      kernel/power/qos.o
  CC      mm/memory.o
  CC      block/partitions/check.o
  CC      block/partitions/msdos.o
  CC      drivers/char/random.o
  CC      kernel/printk/printk.o
  CC      block/partitions/efi.o
  CC      kernel/printk/nmi.o
  CC      fs/direct-io.o
  CC      lib/clz_ctz.o
  CC      lib/bsearch.o
  CC      drivers/char/misc.o
  CC      kernel/rcu/update.o
  LD      kernel/power/built-in.o
  CC      mm/mincore.o
  CC      mm/mlock.o
  CC      kernel/rcu/sync.o
  LD      block/partitions/built-in.o
  CC      block/bsg.o
  CC      block/noop-iosched.o
  LD      drivers/char/agp/built-in.o
  LD      drivers/char/built-in.o
  LD      drivers/char/ipmi/built-in.o
  CC      drivers/clk/clk-devres.o
  CC      drivers/clocksource/sh_tmu.o
  CC      kernel/rcu/srcu.o
  CC      drivers/clk/clkdev.o
  CC      block/deadline-iosched.o
  CC      lib/find_bit.o
  CC      lib/llist.o
  LD      kernel/printk/built-in.o
  CC      lib/memweight.o
  LD      drivers/firewire/built-in.o
  CC      kernel/rcu/tiny.o
  CC      kernel/time/time.o
  CC      mm/mmap.o
  CC      kernel/sched/core.o
  CC      lib/kfifo.o
  LD      drivers/clocksource/built-in.o
  CC      lib/percpu-refcount.o
  CC      lib/percpu_ida.o
  LD      drivers/clk/bcm/built-in.o
  LD      drivers/clk/mvebu/built-in.o
  LD      drivers/clk/ti/built-in.o
  LD      drivers/clk/built-in.o
  LD      drivers/firmware/broadcom/built-in.o
  LD      drivers/firmware/meson/built-in.o
  LD      drivers/firmware/tegra/built-in.o
  LD      drivers/firmware/built-in.o
  LD      drivers/gpu/drm/bridge/built-in.o
  LD      drivers/gpu/drm/hisilicon/built-in.o
  LD      drivers/gpu/drm/i2c/built-in.o
  LD      drivers/gpu/drm/omapdrm/displays/built-in.o
  LD      drivers/gpu/drm/omapdrm/dss/built-in.o
  LD      drivers/gpu/drm/omapdrm/built-in.o
  LD      drivers/gpu/drm/panel/built-in.o
  LD      drivers/gpu/drm/tilcdc/built-in.o
  LD      drivers/gpu/drm/built-in.o
  LD      drivers/gpu/vga/built-in.o
  LD      drivers/gpu/built-in.o
  CC      drivers/hid/hid-core.o
  CC      drivers/hid/hid-input.o
  CC      drivers/hid/hid-generic.o
  CC      block/cfq-iosched.o
  LD      kernel/rcu/built-in.o
  CC      drivers/hid/hid-a4tech.o
/home/kisskb/slave/src/kernel/sched/core.c: In function 'pick_next_task':
/home/kisskb/slave/src/kernel/sched/core.c:3293:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
  CC      lib/rhashtable.o
  CC      kernel/time/timer.o
  CC      fs/mpage.o
  CC      fs/proc_namespace.o
  CC      fs/devpts/inode.o
/home/kisskb/slave/src/block/cfq-iosched.c: In function 'cfq_async_queue_prio':
/home/kisskb/slave/src/block/cfq-iosched.c:3828:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
/home/kisskb/slave/src/mm/mmap.c: In function '__vma_adjust':
/home/kisskb/slave/src/mm/mmap.c:584:2: warning: 'rb_link' may be used uninitialized in this function [-Wmaybe-uninitialized]
  __vma_link_rb(mm, vma, rb_link, rb_parent);
  ^
/home/kisskb/slave/src/mm/mmap.c:615:19: note: 'rb_link' was declared here
  struct rb_node **rb_link, *rb_parent;
                   ^
/home/kisskb/slave/src/mm/mmap.c:584:2: warning: 'rb_parent' may be used uninitialized in this function [-Wmaybe-uninitialized]
  __vma_link_rb(mm, vma, rb_link, rb_parent);
  ^
/home/kisskb/slave/src/mm/mmap.c:615:29: note: 'rb_parent' was declared here
  struct rb_node **rb_link, *rb_parent;
                             ^
/home/kisskb/slave/src/mm/mmap.c:583:2: warning: 'prev' may be used uninitialized in this function [-Wmaybe-uninitialized]
  __vma_link_list(mm, vma, prev, rb_parent);
  ^
/home/kisskb/slave/src/mm/mmap.c:614:25: note: 'prev' was declared here
  struct vm_area_struct *prev;
                         ^
  CC      drivers/hid/hid-apple.o
  LD      fs/devpts/devpts.o
  LD      fs/devpts/built-in.o
  LD      fs/exofs/built-in.o
  CC      kernel/time/hrtimer.o
  CC      kernel/futex.o
  CC      lib/reciprocal_div.o
  CC      lib/once.o
  CC      mm/mprotect.o
  CC      kernel/sched/loadavg.o
  CC      kernel/sched/clock.o
  CC      fs/exportfs/expfs.o
  CC      lib/string_helpers.o
  CC      lib/hexdump.o
  CC      kernel/sched/cputime.o
  CC      lib/kstrtox.o
  LD      fs/exportfs/exportfs.o
  CC      kernel/up.o
  LD      fs/exportfs/built-in.o
  CC      fs/kernfs/mount.o
  CC      mm/mremap.o
  CC      mm/msync.o
  CC      kernel/sched/idle_task.o
  CC      kernel/time/timekeeping.o
  LD      block/built-in.o
  CC      kernel/time/ntp.o
  CC      mm/rmap.o
  CC      fs/kernfs/inode.o
  CC      kernel/sched/fair.o
  CC      lib/iomap_copy.o
  CC      drivers/hid/hid-belkin.o
  CC      drivers/hid/hid-cherry.o
  CC      drivers/hid/hid-chicony.o
  CC      lib/devres.o
  CC      kernel/uid16.o
  CC      kernel/kallsyms.o
  CC      kernel/utsname.o
  CC      fs/kernfs/dir.o
  CC      lib/hweight.o
  CC      drivers/hid/hid-cypress.o
  CC      fs/notify/fsnotify.o
  CC      lib/bitrev.o
  HOSTCC  lib/gen_crc32table
  CC      kernel/sched/rt.o
  CC      mm/vmalloc.o
  CC      mm/pagewalk.o
  CC      lib/syscall.o
  CC      kernel/time/clocksource.o
  CC      drivers/hid/hid-ezkey.o
  CC      drivers/hid/hid-kensington.o
  CC      fs/notify/notification.o
  CC      lib/atomic64.o
  CC      mm/pgtable-generic.o
  CC      drivers/hid/hid-lg.o
  CC      fs/proc/task_mmu.o
  CC      fs/kernfs/file.o
  CC      kernel/sched/deadline.o
  CC      kernel/sched/stop_task.o
  CC      lib/strncpy_from_user.o
  CC      fs/notify/group.o
  CC      kernel/time/jiffies.o
  CC      lib/strnlen_user.o
  CC      kernel/sched/wait.o
  CC      fs/notify/inode_mark.o
  CC      mm/process_vm_access.o
  CC      kernel/time/timer_list.o
  CC      lib/sbitmap.o
  CC      lib/argv_split.o
  CC      kernel/time/timeconv.o
  CC      fs/kernfs/symlink.o
  CC      fs/notify/mark.o
  CC      drivers/hid/hid-microsoft.o
  CC      kernel/sched/swait.o
  CC      kernel/sched/completion.o
  CC      mm/init-mm.o
  CC      fs/proc/inode.o
  CC      kernel/time/timecounter.o
  LD      fs/kernfs/built-in.o
  CC      lib/bug.o
  CC      lib/chacha20.o
  CC      kernel/time/alarmtimer.o
  CC      kernel/time/posix-timers.o
  CC      mm/bootmem.o
  CC      kernel/sched/idle.o
  CC      drivers/hid/hid-monterey.o
  CC      fs/notify/vfsmount_mark.o
  CC      fs/notify/fdinfo.o
  LD      drivers/hid/hid.o
  CC      kernel/time/posix-cpu-timers.o
  CC      lib/cmdline.o
/home/kisskb/slave/src/mm/bootmem.c: In function 'mark_bootmem':
/home/kisskb/slave/src/mm/bootmem.c:385:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^
  CC      lib/ctype.o
  CC      lib/dec_and_lock.o
  LD      drivers/hid/hid-logitech.o
  LD      drivers/hid/built-in.o
  LD      drivers/hwtracing/intel_th/built-in.o
  LD      drivers/idle/built-in.o
  CC      lib/decompress.o
  LD      drivers/i2c/algos/built-in.o
  LD      drivers/i2c/busses/built-in.o
  LD      drivers/i2c/muxes/built-in.o
  LD      drivers/i2c/built-in.o
  CC      fs/proc/root.o
  CC      drivers/input/input.o
  CC      lib/dma-noop.o
  CC      drivers/input/serio/serio.o
  CC      lib/dump_stack.o
  LD      kernel/sched/built-in.o
  LD      fs/notify/dnotify/built-in.o
  LD      fs/notify/fanotify/built-in.o
  CC      drivers/input/serio/serport.o
  CC      fs/notify/inotify/inotify_fsnotify.o
  CC      mm/fadvise.o
  CC      mm/madvise.o
  CC      mm/memblock.o
  CC      lib/earlycpio.o
  CC      fs/proc/base.o
  CC      lib/extable.o
  CC      fs/notify/inotify/inotify_user.o
  CC      kernel/time/posix-clock.o
  CC      fs/proc/generic.o
  CC      lib/flex_proportions.o
  CC      drivers/input/serio/libps2.o
  LD      fs/quota/built-in.o
  LD      drivers/iommu/built-in.o
  CC      fs/proc/array.o
  CC      lib/idr.o
  LD      fs/notify/inotify/built-in.o
  LD      fs/notify/built-in.o
  CC      lib/int_sqrt.o
  CC      kernel/time/itimer.o
  CC      kernel/time/clockevents.o
  CC      fs/proc/fd.o
  CC      lib/ioremap.o
  LD      drivers/input/serio/built-in.o
  CC      kernel/time/tick-common.o
  CC      mm/page_io.o
  CC      drivers/input/input-compat.o
  CC      drivers/input/input-mt.o
  CC      drivers/input/ff-core.o
  CC      lib/irq_regs.o
  CC      lib/is_single_threaded.o
  CC      lib/klist.o
  CC      kernel/time/sched_clock.o
  CC      kernel/pid_namespace.o
  CC      drivers/input/mousedev.o
  CC      fs/proc/proc_tty.o
  CC      kernel/utsname_sysctl.o
  CC      mm/swap_state.o
  CC      lib/kobject.o
  LD      kernel/time/built-in.o
  CC      kernel/elfcore.o
  CC      kernel/irq_work.o
  CC      drivers/input/keyboard/atkbd.o
  CC      fs/proc/cmdline.o
  CC      fs/ramfs/inode.o
  CC      fs/ramfs/file-mmu.o
  CC      lib/kobject_uevent.o
  CC      lib/md5.o
  CC      fs/proc/consoles.o
  CC      kernel/membarrier.o
  CC      kernel/memremap.o
  LD      drivers/irqchip/built-in.o
  LD      drivers/lguest/built-in.o
  CC      mm/swapfile.o
  CC      mm/dmapool.o
  LD      drivers/macintosh/built-in.o
  CC      mm/sparse.o
  CC      drivers/input/mouse/psmouse-base.o
  LD      fs/ramfs/ramfs.o
  LD      fs/ramfs/built-in.o
  CC      drivers/input/mouse/synaptics.o
  CC      fs/proc/cpuinfo.o
  CC      fs/proc/devices.o
  LD      kernel/built-in.o
  CC      fs/sysfs/file.o
  CC      drivers/input/mouse/focaltech.o
  CC      lib/nmi_backtrace.o
  LD      drivers/input/keyboard/built-in.o
  CC      lib/nodemask.o
  CC      lib/plist.o
  CC      fs/proc/interrupts.o
  CC      lib/radix-tree.o
  CC      fs/proc/loadavg.o
  CC      fs/proc/meminfo.o
  CC      fs/sysfs/dir.o
  CC      lib/ratelimit.o
  CC      lib/rbtree.o
  CC      lib/seq_buf.o
  CC      lib/sha1.o
  CC      fs/sysfs/symlink.o
  CC      lib/show_mem.o
  CC      fs/proc/stat.o
  CC      drivers/input/mouse/alps.o
  LD      drivers/media/common/b2c2/built-in.o
  LD      drivers/media/common/saa7146/built-in.o
  LD      drivers/media/common/siano/built-in.o
  LD      drivers/media/common/v4l2-tpg/built-in.o
  LD      drivers/media/common/built-in.o
  LD      drivers/media/firewire/built-in.o
  CC      fs/sysfs/mount.o
  LD      drivers/media/i2c/soc_camera/built-in.o
  LD      drivers/media/i2c/built-in.o
  LD      drivers/media/mmc/siano/built-in.o
  LD      drivers/media/mmc/built-in.o
  CC      lib/string.o
  LD      drivers/media/pci/b2c2/built-in.o
  LD      drivers/media/pci/ddbridge/built-in.o
  LD      drivers/media/pci/dm1105/built-in.o
  LD      drivers/media/pci/mantis/built-in.o
  LD      drivers/media/pci/netup_unidvb/built-in.o
  LD      drivers/media/pci/ngene/built-in.o
  CC      mm/slub.o
  CC      mm/migrate.o
  LD      drivers/media/pci/pluto2/built-in.o
  LD      drivers/media/pci/pt1/built-in.o
  LD      drivers/media/pci/pt3/built-in.o
  LD      drivers/media/pci/saa7146/built-in.o
  CC      mm/quicklist.o
  LD      drivers/media/pci/smipcie/built-in.o
  LD      drivers/media/pci/ttpci/built-in.o
  LD      drivers/media/pci/built-in.o
  LD      drivers/media/platform/omap/built-in.o
  LD      drivers/media/platform/built-in.o
  LD      drivers/media/rc/keymaps/built-in.o
  LD      drivers/media/rc/built-in.o
  LD      drivers/media/spi/built-in.o
  LD      drivers/media/tuners/built-in.o
  CC      fs/proc/uptime.o
  LD      drivers/media/usb/b2c2/built-in.o
  CC      drivers/input/mouse/byd.o
  LD      drivers/media/usb/dvb-usb/built-in.o
  CC      fs/sysfs/group.o
  LD      drivers/media/usb/dvb-usb-v2/built-in.o
  LD      drivers/media/usb/s2255/built-in.o
  LD      drivers/media/usb/siano/built-in.o
  LD      drivers/media/usb/stkwebcam/built-in.o
  LD      drivers/media/usb/ttusb-budget/built-in.o
  LD      drivers/media/usb/ttusb-dec/built-in.o
  LD      drivers/media/usb/zr364xx/built-in.o
  LD      drivers/media/usb/built-in.o
  LD      drivers/media/built-in.o
  CC      fs/proc/version.o
  CC      lib/timerqueue.o
  CC      lib/vsprintf.o
  CC      fs/proc/softirqs.o
  CC      drivers/input/mouse/logips2pp.o
  CC      drivers/input/mouse/trackpoint.o
  LD      fs/sysfs/built-in.o
  CC      drivers/input/mouse/cypress_ps2.o
  CC      fs/proc/namespaces.o
  CC      fs/proc/self.o
  CC      lib/win_minmax.o
  CC      fs/eventpoll.o
  LD      drivers/input/input-core.o
  CC      fs/anon_inodes.o
  CC      fs/proc/thread_self.o
  LD      drivers/mfd/built-in.o
  CC      fs/signalfd.o
  CC      fs/timerfd.o
  CC      fs/eventfd.o
  CC      fs/aio.o
  CC      fs/proc/proc_sysctl.o
  CC      fs/proc/kmsg.o
  LD      drivers/input/mouse/psmouse.o
  LD      drivers/input/mouse/built-in.o
  LD      drivers/input/built-in.o
  LD      drivers/misc/cb710/built-in.o
  LD      drivers/misc/eeprom/built-in.o
  LD      drivers/misc/lis3lv02d/built-in.o
  LD      drivers/misc/mic/bus/built-in.o
  LD      drivers/misc/mic/built-in.o
  GEN     lib/crc32table.h
  LD      drivers/misc/ti-st/built-in.o
  CC      fs/proc/page.o
  LD      drivers/misc/built-in.o
  CC      fs/locks.o
  LD      drivers/mmc/built-in.o
  LD      drivers/net/built-in.o
  LD      drivers/nfc/built-in.o
  LD      drivers/nvme/host/built-in.o
  LD      drivers/nvme/target/built-in.o
  LD      drivers/nvme/built-in.o
  CC      fs/binfmt_script.o
  LD      drivers/perf/built-in.o
  LD      drivers/platform/built-in.o
  LD      drivers/power/built-in.o
  LD      drivers/ptp/built-in.o
  LD      drivers/pwm/built-in.o
  CC      lib/crc32.o
  CC      drivers/rtc/rtc-lib.o
  CC      drivers/sh/clk/core.o
  CC      drivers/sh/intc/access.o
  LD      drivers/rtc/built-in.o
  CC      drivers/sh/intc/chip.o
  CC      drivers/sh/clk/cpg.o
  CC      drivers/sh/pm_runtime.o
  CC      fs/binfmt_elf.o
  AR      lib/lib.a
  EXPORTS lib/lib-ksyms.o
  LD      lib/built-in.o
  LD      drivers/soc/bcm/built-in.o
  LD      drivers/soc/fsl/built-in.o
  LD      drivers/soc/built-in.o
  CC      drivers/sh/intc/core.o
  CC      fs/coredump.o
  CC      drivers/tty/tty_io.o
  CC      fs/drop_caches.o
  LD      fs/proc/proc.o
  LD      fs/proc/built-in.o
  CC      drivers/sh/intc/handle.o
  LD      mm/built-in.o
/home/kisskb/slave/src/drivers/sh/clk/cpg.c: In function 'r8':
/home/kisskb/slave/src/drivers/sh/clk/cpg.c:41:17: warning: passing argument 1 of 'ioread8' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
  return ioread8(addr);
                 ^
In file included from /home/kisskb/slave/src/arch/sh/include/asm/io.h:20:0,
                 from /home/kisskb/slave/src/include/linux/io.h:25,
                 from /home/kisskb/slave/src/drivers/sh/clk/cpg.c:14:
/home/kisskb/slave/src/include/asm-generic/iomap.h:28:21: note: expected 'void *' but argument is of type 'const void *'
 extern unsigned int ioread8(void __iomem *);
                     ^
/home/kisskb/slave/src/drivers/sh/clk/cpg.c: In function 'r16':
/home/kisskb/slave/src/drivers/sh/clk/cpg.c:46:18: warning: passing argument 1 of 'ioread16' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
  return ioread16(addr);
                  ^
In file included from /home/kisskb/slave/src/arch/sh/include/asm/io.h:20:0,
                 from /home/kisskb/slave/src/include/linux/io.h:25,
                 from /home/kisskb/slave/src/drivers/sh/clk/cpg.c:14:
/home/kisskb/slave/src/include/asm-generic/iomap.h:29:21: note: expected 'void *' but argument is of type 'const void *'
 extern unsigned int ioread16(void __iomem *);
                     ^
/home/kisskb/slave/src/drivers/sh/clk/cpg.c: In function 'r32':
/home/kisskb/slave/src/drivers/sh/clk/cpg.c:51:18: warning: passing argument 1 of 'ioread32' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
  return ioread32(addr);
                  ^
In file included from /home/kisskb/slave/src/arch/sh/include/asm/io.h:20:0,
                 from /home/kisskb/slave/src/include/linux/io.h:25,
                 from /home/kisskb/slave/src/drivers/sh/clk/cpg.c:14:
/home/kisskb/slave/src/include/asm-generic/iomap.h:31:21: note: expected 'void *' but argument is of type 'const void *'
 extern unsigned int ioread32(void __iomem *);
                     ^
  CC      drivers/sh/intc/irqdomain.o
  CC      drivers/tty/n_tty.o
  LD      drivers/sh/clk/built-in.o
  CC      drivers/sh/intc/virq.o
  CC      drivers/tty/tty_ioctl.o
  CC      drivers/tty/tty_ldisc.o
  CC      fs/fhandle.o
  CC      drivers/tty/tty_buffer.o
  CC      drivers/tty/tty_port.o
  LD      drivers/sh/intc/built-in.o
  LD      drivers/sh/built-in.o
  CC      drivers/tty/tty_mutex.o
  CC      drivers/tty/tty_ldsem.o
  CC      drivers/tty/pty.o
  LD      drivers/tty/ipwireless/built-in.o
  LD      drivers/tty/serial/built-in.o
  CC      drivers/tty/vt/vt_ioctl.o
  LD      drivers/video/backlight/built-in.o
  CC      drivers/video/console/dummycon.o
  CC      drivers/tty/vt/vc_screen.o
  CC      drivers/tty/vt/selection.o
  LD      fs/built-in.o
  LD      drivers/video/fbdev/core/built-in.o
  LD      drivers/video/fbdev/omap2/omapfb/displays/built-in.o
  CC      drivers/tty/vt/keyboard.o
  LD      drivers/video/fbdev/omap2/omapfb/dss/built-in.o
  LD      drivers/video/fbdev/omap2/omapfb/built-in.o
  LD      drivers/video/fbdev/omap2/built-in.o
  LD      drivers/video/fbdev/built-in.o
  CC      drivers/tty/vt/consolemap.o
  CONMK   drivers/tty/vt/consolemap_deftbl.c
  CC      drivers/tty/vt/vt.o
  LD      drivers/video/console/built-in.o
  LD      drivers/video/built-in.o
  SHIPPED drivers/tty/vt/defkeymap.c
  CC      drivers/tty/vt/consolemap_deftbl.o
  CC      drivers/tty/vt/defkeymap.o
  LD      drivers/tty/vt/built-in.o
  LD      drivers/tty/built-in.o
  LD      drivers/built-in.o
  GEN     .version
  CHK     include/generated/compile.h
  UPD     include/generated/compile.h
  CC      init/version.o
  LD      init/built-in.o
  LD      vmlinux.o
  MODPOST vmlinux.o
  KSYM    .tmp_kallsyms1.o
  KSYM    .tmp_kallsyms2.o
  LD      vmlinux
  SYSMAP  System.map
  AS      arch/sh/boot/compressed/head_32.o
  CC      arch/sh/boot/compressed/misc.o
  CC      arch/sh/boot/compressed/cache.o
  OBJCOPY arch/sh/boot/compressed/vmlinux.bin
  SHIPPED arch/sh/boot/compressed/ashldi3.c
  SHIPPED arch/sh/boot/compressed/ashrsi3.S
  SHIPPED arch/sh/boot/compressed/ashiftrt.S
  SHIPPED arch/sh/boot/compressed/ashlsi3.S
  SHIPPED arch/sh/boot/compressed/lshrsi3.S
  CC      arch/sh/boot/compressed/ashldi3.o
  AS      arch/sh/boot/compressed/ashrsi3.o
  AS      arch/sh/boot/compressed/ashlsi3.o
  AS      arch/sh/boot/compressed/lshrsi3.o
  GZIP    arch/sh/boot/compressed/vmlinux.bin.gz
  AS      arch/sh/boot/compressed/ashiftrt.o
  LD      arch/sh/boot/compressed/piggy.o
  LD      arch/sh/boot/compressed/vmlinux
  OBJCOPY arch/sh/boot/zImage
  Kernel: arch/sh/boot/zImage is ready
make[1]: Leaving directory '/home/kisskb/slave/build/linus_edosk7705_defconfig_sh4'
Completed OK
# rm -rf /home/kisskb/slave/build/linus_edosk7705_defconfig_sh4
# Build took: 0:00:41.704619