# git rev-parse -q --verify f511c0b17b081562dca8ac5061dfa86db4c66cc2^{commit}
f511c0b17b081562dca8ac5061dfa86db4c66cc2
already have revision, skipping fetch
# git checkout -q -f -B kisskb f511c0b17b081562dca8ac5061dfa86db4c66cc2
# git clean -qxdf
# git log -1
commit f511c0b17b081562dca8ac5061dfa86db4c66cc2
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date:   Tue May 30 12:38:59 2017 -0700

    "Yes, people use FOLL_FORCE ;)"
    
    This effectively reverts commit 8ee74a91ac30 ("proc: try to remove use
    of FOLL_FORCE entirely")
    
    It turns out that people do depend on FOLL_FORCE for the /proc/<pid>/mem
    case, and we're talking not just debuggers. Talking to the affected people, the use-cases are:
    
    Keno Fischer:
     "We used these semantics as a hardening mechanism in the julia JIT. By
      opening /proc/self/mem and using these semantics, we could avoid
      needing RWX pages, or a dual mapping approach. We do have fallbacks to
      these other methods (though getting EIO here actually causes an assert
      in released versions - we'll updated that to make sure to take the
      fall back in that case).
    
      Nevertheless the /proc/self/mem approach was our favored approach
      because it a) Required an attacker to be able to execute syscalls
      which is a taller order than getting memory write and b) didn't double
      the virtual address space requirements (as a dual mapping approach
      would).
    
      I think in general this feature is very useful for anybody who needs
      to precisely control the execution of some other process. Various
      debuggers (gdb/lldb/rr) certainly fall into that category, but there's
      another class of such processes (wine, various emulators) which may
      want to do that kind of thing.
    
      Now, I suspect most of these will have the other process under ptrace
      control, so maybe allowing (same_mm || ptraced) would be ok, but at
      least for the sandbox/remote-jit use case, it would be perfectly
      reasonable to not have the jit server be a ptracer"
    
    Robert O'Callahan:
     "We write to readonly code and data mappings via /proc/.../mem in lots
      of different situations, particularly when we're adjusting program
      state during replay to match the recorded execution.
    
      Like Julia, we can add workarounds, but they could be expensive."
    
    so not only do people use FOLL_FORCE for both reads and writes, but they
    use it for both the local mm and remote mm.
    
    With these comments in mind, we likely also cannot add the "are we
    actively ptracing" check either, so this keeps the new code organization
    and does not do a real revert that would add back the original comment
    about "Maybe we should limit FOLL_FORCE to actual ptrace users?"
    
    Reported-by: Keno Fischer <keno@juliacomputing.com>
    Reported-by: Robert O'Callahan <robert@ocallahan.org>
    Cc: Kees Cook <keescook@chromium.org>
    Cc: Andy Lutomirski <luto@amacapital.net>
    Cc: Eric Biederman <ebiederm@xmission.com>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/sh4-linux/bin/sh4-linux-gcc --version
# < git log --format=%s --max-count=1 f511c0b17b081562dca8ac5061dfa86db4c66cc2
# < make -j 48 ARCH=sh O=/home/kisskb/slave/build/linus_sh-allyesconfig_sh4 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/sh4-linux/bin/sh4-linux-  allyesconfig
# Added to kconfig CONFIG_BUILD_DOCSRC=n
# Added to kconfig CONFIG_MODULE_SIG=n
# yes \n | make -j 48 ARCH=sh O=/home/kisskb/slave/build/linus_sh-allyesconfig_sh4 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/sh4-linux/bin/sh4-linux-  oldconfig
yes: standard output: Broken pipe
yes: write error
# make -j 48 ARCH=sh O=/home/kisskb/slave/build/linus_sh-allyesconfig_sh4 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/sh4-linux/bin/sh4-linux-  
make[1]: Entering directory '/home/kisskb/slave/build/linus_sh-allyesconfig_sh4'
  GEN     ./Makefile
scripts/kconfig/conf  --silentoldconfig Kconfig
  CHK     include/config/kernel.release
  GEN     ./Makefile
  WRAP    arch/sh/include/generated/asm/bitsperlong.h
  WRAP    arch/sh/include/generated/asm/current.h
  WRAP    arch/sh/include/generated/asm/clkdev.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/fcntl.h
  WRAP    arch/sh/include/generated/asm/ipcbuf.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/ioctl.h
  WRAP    arch/sh/include/generated/asm/mcs_spinlock.h
  WRAP    arch/sh/include/generated/asm/irq_regs.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
  UPD     include/config/kernel.release
  CHK     include/generated/uapi/linux/version.h
  UPD     include/generated/uapi/linux/version.h
  CHK     include/generated/utsrelease.h
  UPD     include/generated/utsrelease.h
  HOSTCC  scripts/basic/bin2c
  Using /home/kisskb/slave/src as source for kernel
  HOSTCC  scripts/kallsyms
  HOSTCC  scripts/pnmtologo
  HOSTCC  scripts/conmakehash
  HOSTCC  scripts/asn1_compiler
  HOSTCC  scripts/extract-cert
  HOSTCC  scripts/insert-sys-cert
  HOSTCC  scripts/genksyms/genksyms.o
  SHIPPED scripts/genksyms/parse.tab.c
  HOSTCC  scripts/dtc/dtc.o
  SHIPPED scripts/genksyms/keywords.hash.c
  SHIPPED scripts/genksyms/lex.lex.c
  HOSTCC  scripts/dtc/data.o
  HOSTCC  scripts/dtc/fstree.o
  CC      scripts/mod/devicetable-offsets.s
  HOSTCC  scripts/mod/mk_elfconfig
  SHIPPED scripts/genksyms/parse.tab.h
  HOSTCC  scripts/dtc/srcpos.o
  HOSTCC  scripts/dtc/flattree.o
  HOSTCC  scripts/dtc/treesource.o
  HOSTCC  scripts/dtc/livetree.o
  CC      scripts/mod/empty.o
  HOSTCC  scripts/genksyms/parse.tab.o
  HOSTCC  scripts/dtc/checks.o
  HOSTCC  scripts/genksyms/lex.lex.o
  SHIPPED scripts/dtc/dtc-parser.tab.h
  HOSTCC  scripts/dtc/util.o
  SHIPPED scripts/dtc/dtc-parser.tab.c
  SHIPPED scripts/dtc/dtc-lexer.lex.c
  HOSTCC  scripts/dtc/dtc-parser.tab.o
  HOSTCC  scripts/selinux/genheaders/genheaders
  HOSTCC  scripts/selinux/mdp/mdp
  HOSTCC  scripts/dtc/dtc-lexer.lex.o
  CHK     scripts/mod/devicetable-offsets.h
  UPD     scripts/mod/devicetable-offsets.h
  MKELF   scripts/mod/elfconfig.h
  HOSTCC  scripts/mod/modpost.o
  HOSTCC  scripts/mod/sumversion.o
  HOSTCC  scripts/mod/file2alias.o
  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
  HOSTLD  scripts/dtc/dtc
  HOSTLD  scripts/genksyms/genksyms
  CHK     include/generated/asm-offsets.h
  UPD     include/generated/asm-offsets.h
  CALL    /home/kisskb/slave/src/scripts/checksyscalls.sh
  HOSTLD  scripts/mod/modpost
<stdin>:1317:2: warning: #warning syscall pkey_mprotect not implemented [-Wcpp]
<stdin>:1320:2: warning: #warning syscall pkey_alloc not implemented [-Wcpp]
<stdin>:1323:2: warning: #warning syscall pkey_free not implemented [-Wcpp]
<stdin>:1326:2: warning: #warning syscall statx not implemented [-Wcpp]
  CC      init/main.o
  CHK     include/generated/compile.h
  CC      init/do_mounts.o
  CC      init/do_mounts_rd.o
  CC      init/do_mounts_initrd.o
  CC      init/do_mounts_md.o
  CC      init/initramfs.o
  CC      init/calibrate.o
  HOSTCC  usr/gen_init_cpio
  CC      init/init_task.o
  UPD     include/generated/compile.h
  CC      init/version.o
  CC      arch/sh/mm/alignment.o
  CC      arch/sh/mm/cache.o
  CC      arch/sh/mm/init.o
  CC      arch/sh/mm/consistent.o
  CC      arch/sh/mm/mmap.o
  CC      arch/sh/mm/nommu.o
  CC      arch/sh/mm/extable_32.o
  CC      arch/sh/mm/cache-sh2.o
  CC      arch/sh/mm/asids-debugfs.o
  CC      arch/sh/boards/of-generic.o
  AS      arch/sh/kernel/debugtraps.o
  CC      arch/sh/kernel/dumpstack.o
  CC      arch/sh/kernel/dma-nommu.o
  CC      arch/sh/kernel/irq.o
  CC      arch/sh/kernel/irq_32.o
  CC      arch/sh/kernel/io.o
  CC      arch/sh/kernel/idle.o
  CC      arch/sh/kernel/kdebugfs.o
  CC      arch/sh/kernel/process.o
  CC      arch/sh/kernel/machvec.o
  CC      arch/sh/kernel/setup.o
  CC      arch/sh/kernel/reboot.o
  CC      arch/sh/kernel/ptrace_32.o
  CC      arch/sh/kernel/return_address.o
  CC      arch/sh/kernel/nmi_debug.o
  CC      arch/sh/kernel/topology.o
  CC      arch/sh/kernel/process_32.o
  CC      arch/sh/kernel/ptrace.o
  CC      arch/sh/kernel/signal_32.o
  CC      arch/sh/kernel/traps.o
  CC      arch/sh/kernel/traps_32.o
  CC      arch/sh/kernel/time.o
  CC      arch/sh/kernel/iomap.o
  CC      arch/sh/kernel/unwinder.o
  AS      arch/sh/kernel/syscalls_32.o
  CC      arch/sh/math-emu/math.o
  CC      arch/sh/kernel/sys_sh.o
  CC      arch/sh/kernel/sys_sh32.o
  CC      arch/sh/kernel/sh_bios.o
make[2]: *** No rule to make target 'arch/sh/boot/dts/.dtb.o', needed by 'arch/sh/boot/dts/built-in.o'.  Stop.
  CC      arch/sh/kernel/kgdb.o
  CC      arch/sh/kernel/sh_ksyms_32.o
/home/kisskb/slave/src/Makefile:1016: recipe for target 'arch/sh/boot/dts' failed
make[1]: *** [arch/sh/boot/dts] Error 2
make[1]: *** Waiting for unfinished jobs....
  CC      arch/sh/kernel/module.o
  CC      arch/sh/kernel/crash_dump.o
  GEN     usr/initramfs_data.cpio.gz
  CC      arch/sh/kernel/cpu/irq/imask.o
In file included from /home/kisskb/slave/src/arch/sh/math-emu/math.c:23:0:
/home/kisskb/slave/src/include/math-emu/single.h:50:21: warning: "__BIG_ENDIAN" is not defined [-Wundef]
In file included from /home/kisskb/slave/src/arch/sh/math-emu/math.c:24:0:
/home/kisskb/slave/src/include/math-emu/double.h:59:21: warning: "__BIG_ENDIAN" is not defined [-Wundef]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:54:0: warning: "WRITE" redefined [enabled by default]
/home/kisskb/slave/src/include/linux/kernel.h:57:0: note: this is the location of the previous definition
/home/kisskb/slave/src/arch/sh/math-emu/math.c:55:0: warning: "READ" redefined [enabled by default]
/home/kisskb/slave/src/include/linux/kernel.h:56:0: note: this is the location of the previous definition
/home/kisskb/slave/src/arch/sh/math-emu/math.c: In function 'fcmp_gt':
/home/kisskb/slave/src/arch/sh/math-emu/math.c:81:1: warning: left shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:81:1: warning: left shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c: In function 'fcmp_eq':
/home/kisskb/slave/src/arch/sh/math-emu/math.c:92:1: warning: left shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:92:1: warning: left shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c: In function 'fadd':
/home/kisskb/slave/src/arch/sh/math-emu/math.c:108:1: warning: left shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:108:1: warning: left shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:108:1: warning: right shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:108:1: warning: left shift count >= width of type [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:108:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:108:1: warning: right shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:108:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:108:1: warning: right shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:108:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:108:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:108:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:108:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c: In function 'fsub':
/home/kisskb/slave/src/arch/sh/math-emu/math.c:115:1: warning: left shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:115:1: warning: left shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:115:1: warning: right shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:115:1: warning: left shift count >= width of type [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:115:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:115:1: warning: right shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:115:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:115:1: warning: right shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:115:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:115:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:115:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:115:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c: In function 'fmul':
/home/kisskb/slave/src/arch/sh/math-emu/math.c:122:1: warning: left shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:122:1: warning: left shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:122:1: warning: right shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:122:1: warning: left shift count >= width of type [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:122:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:122:1: warning: right shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:122:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:122:1: warning: right shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:122:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:122:1: warning: right shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:122:1: warning: left shift count >= width of type [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:122:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:122:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:122:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c: In function 'fdiv':
/home/kisskb/slave/src/arch/sh/math-emu/math.c:129:1: warning: left shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:129:1: warning: left shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:129:1: warning: left shift count is negative [enabled by default]
  CC      arch/sh/kernel/stacktrace.o
/home/kisskb/slave/src/arch/sh/math-emu/math.c:129:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:129:1: warning: right shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:129:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:129:1: warning: right shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:129:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:129:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:129:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:129:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c: In function 'fmac':
/home/kisskb/slave/src/arch/sh/math-emu/math.c:145:2: warning: right shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:145:2: warning: left shift count >= width of type [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:147:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:147:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:147:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c: In function 'ffloat':
/home/kisskb/slave/src/arch/sh/math-emu/math.c:294:3: warning: right shift count >= width of type [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:294:3: warning: right shift count >= width of type [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:294:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:294:3: warning: right shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:294:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:294:3: warning: right shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:294:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:296:3: warning: right shift count >= width of type [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:296:3: warning: right shift count >= width of type [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:296:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:296:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:296:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c: In function 'ftrc':
/home/kisskb/slave/src/arch/sh/math-emu/math.c:310:1: warning: left shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:310:1: warning: left shift count >= width of type [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:310:1: warning: left shift count >= width of type [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:310:1: warning: right shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:310:1: warning: left shift count >= width of type [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c: In function 'fcnvsd':
/home/kisskb/slave/src/arch/sh/math-emu/math.c:323:2: warning: left shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:324:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:324:2: warning: right shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:324:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:324:2: warning: right shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:324:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c: In function 'fcnvds':
/home/kisskb/slave/src/arch/sh/math-emu/math.c:333:1: warning: left shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:334:2: warning: right shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:334:2: warning: left shift count >= width of type [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:334:2: warning: right shift count is negative [enabled by default]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:335:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:335:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c:335:1: warning: statement with no effect [-Wunused-value]
/home/kisskb/slave/src/arch/sh/math-emu/math.c: At top level:
/home/kisskb/slave/src/arch/sh/math-emu/math.c:505:12: warning: 'ieee_fpe_handler' defined but not used [-Wunused-function]
  CC      arch/sh/kernel/cpu/clock-cpg.o
  AS      arch/sh/kernel/cpu/sh2/ex.o
  CC      arch/sh/kernel/cpu/sh2/probe.o
  CC      arch/sh/kernel/cpu/clock.o
  CC      arch/sh/kernel/cpu/init.o
  AS      arch/sh/kernel/cpu/sh2/entry.o
  CC      arch/sh/kernel/cpu/sh2/setup-sh7619.o
  AS      usr/initramfs_data.o
  CC      arch/sh/kernel/cpu/sh2/clock-sh7619.o
  CC      arch/sh/kernel/kprobes.o
  CC      arch/sh/kernel/ftrace.o
  CC      arch/sh/kernel/cpu/fpu.o
/home/kisskb/slave/src/arch/sh/kernel/cpu/sh2/../../entry-common.S: Assembler messages:
/home/kisskb/slave/src/arch/sh/kernel/cpu/sh2/../../entry-common.S:89: Warning: overflow in branch to __restore_all; converted into longer instruction sequence
/home/kisskb/slave/src/arch/sh/kernel/cpu/sh2/../../entry-common.S:208: Warning: overflow in branch to syscall_call; converted into longer instruction sequence
/home/kisskb/slave/src/arch/sh/kernel/cpu/sh2/../../entry-common.S:356: Warning: overflow in branch to syscall_trace_entry; converted into longer instruction sequence
/home/kisskb/slave/src/arch/sh/kernel/cpu/sh2/../../entry-common.S:358: Warning: overflow in branch to syscall_trace_entry; converted into longer instruction sequence
/home/kisskb/slave/src/arch/sh/kernel/cpu/sh2/../../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/sh2/../../entry-common.S:392: Warning: overflow in branch to syscall_exit_work; converted into longer instruction sequence
  CC      arch/sh/kernel/cpu/proc.o
  CC      arch/sh/kernel/cpu/pfc.o
  CC      arch/sh/kernel/disassemble.o
  CC      arch/sh/kernel/dwarf.o
  LD      usr/built-in.o
/home/kisskb/slave/src/arch/sh/kernel/cpu/clock-cpg.c: In function 'cpg_clk_init':
/home/kisskb/slave/src/arch/sh/kernel/cpu/clock-cpg.c:52:3: warning: 'arch_init_clk_ops' is deprecated (declared at /home/kisskb/slave/src/arch/sh/include/asm/clock.h:7) [-Wdeprecated-declarations]
/home/kisskb/slave/src/arch/sh/kernel/cpu/clock-cpg.c: In function 'arch_clk_init':
/home/kisskb/slave/src/arch/sh/kernel/cpu/clock-cpg.c:76:2: warning: 'cpg_clk_init' is deprecated (declared at /home/kisskb/slave/src/arch/sh/kernel/cpu/clock-cpg.c:46) [-Wdeprecated-declarations]
  CC      arch/sh/kernel/perf_event.o
  CC      arch/sh/kernel/perf_callchain.o
  LDS     arch/sh/kernel/vmlinux.lds
  CC      arch/sh/kernel/hw_breakpoint.o
  AS      arch/sh/kernel/head_32.o
  LD      arch/sh/boards/built-in.o
  LD      arch/sh/mm/built-in.o
/home/kisskb/slave/src/arch/sh/kernel/cpu/clock.c: In function 'clk_init':
/home/kisskb/slave/src/arch/sh/kernel/cpu/clock.c:25:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
  LD      arch/sh/kernel/cpu/irq/built-in.o
  LD      arch/sh/kernel/cpu/sh2/built-in.o
  LD      arch/sh/kernel/cpu/built-in.o
  LD      init/mounts.o
  LD      init/built-in.o
  LD      arch/sh/kernel/built-in.o
  LD      arch/sh/math-emu/built-in.o
make[1]: *** wait: No child processes.  Stop.
Makefile:152: recipe for target 'sub-make' failed
make: *** [sub-make] Error 2
Command 'make -j 48 ARCH=sh O=/home/kisskb/slave/build/linus_sh-allyesconfig_sh4 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/sh4-linux/bin/sh4-linux-  ' returned non-zero exit status 2
# rm -rf /home/kisskb/slave/build/linus_sh-allyesconfig_sh4
# Build took: 0:00:09.657707