# git rev-parse -q --verify ebda7e3c2ebb244682d068c7d9ad8ad25404295a^{commit}
ebda7e3c2ebb244682d068c7d9ad8ad25404295a
already have revision, skipping fetch
# git checkout -q -f -B kisskb ebda7e3c2ebb244682d068c7d9ad8ad25404295a
# git clean -qxdf
# < git log -1
# commit ebda7e3c2ebb244682d068c7d9ad8ad25404295a
# Author: Breno Leitao <leitao@debian.org>
# Date:   Tue Jan 8 09:31:21 2019 -0200
# 
#     selftests/powerpc: New TM signal self test
#     
#     A new self test that forces MSR[TS] to be set without calling any TM
#     instruction. This test also tries to cause a page fault at a signal
#     handler, exactly between MSR[TS] set and tm_recheckpoint(), forcing
#     thread->texasr to be rewritten with TEXASR[FS] = 0, which will cause a BUG
#     when tm_recheckpoint() is called.
#     
#     This test is not deterministic, since it is hard to guarantee that the page
#     access will cause a page fault. In order to force more page faults at
#     signal context, the signal handler and the ucontext are being mapped into a
#     MADV_DONTNEED memory chunks.
#     
#     Tests have shown that the bug could be exposed with few interactions in a
#     buggy kernel. This test is configured to loop 5000x, having a good chance
#     to hit the kernel issue in just one run.  This self test takes less than
#     two seconds to run.
#     
#     This test uses set/getcontext because the kernel will recheckpoint
#     zeroed structures, causing the test to segfault, which is undesired because
#     the test needs to rerun, so, there is a signal handler for SIGSEGV which
#     will restart the test.
#     
#     v2: Uses the MADV_DONTNEED memory advice
#     v3: Fix memcpy and 32-bits compilation
#     v4: Does not define unused macros
#     
#     Signed-off-by: Breno Leitao <leitao@debian.org>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-gcc --version
# < /opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-ld --version
# < git log --format=%s --max-count=1 ebda7e3c2ebb244682d068c7d9ad8ad25404295a
# < make -s -j 48 ARCH=arm64 O=/kisskb/build/powerpc-next_arm64-defconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  defconfig
# make -s -j 48 ARCH=arm64 O=/kisskb/build/powerpc-next_arm64-defconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  
arch/arm64/Makefile:27: ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum
arch/arm64/Makefile:40: LSE atomics not supported by binutils
/kisskb/src/arch/arm64/boot/dts/rockchip/rk3399-gru-bob.dts:25.9-29.5: Warning (graph_port): /edp-panel/ports: graph port node name should be 'port'
/kisskb/src/arch/arm64/boot/dts/rockchip/rk3399-gru-kevin.dts:46.9-50.5: Warning (graph_port): /edp-panel/ports: graph port node name should be 'port'
/kisskb/src/arch/arm64/boot/dts/rockchip/rk3399-sapphire-excavator.dts:94.9-98.5: Warning (graph_port): /edp-panel/ports: graph port node name should be 'port'
In file included from /kisskb/src/include/linux/rwsem.h:16:0,
                 from /kisskb/src/include/linux/notifier.h:15,
                 from /kisskb/src/include/linux/clk.h:17,
                 from /kisskb/src/drivers/tty/serial/sh-sci.c:24:
/kisskb/src/drivers/tty/serial/sh-sci.c: In function 'sci_submit_rx':
/kisskb/src/include/linux/spinlock.h:279:3: warning: 'flags' may be used uninitialized in this function [-Wmaybe-uninitialized]
   _raw_spin_unlock_irqrestore(lock, flags); \
   ^
/kisskb/src/drivers/tty/serial/sh-sci.c:1338:16: note: 'flags' was declared here
  unsigned long flags;
                ^
Completed OK
# rm -rf /kisskb/build/powerpc-next_arm64-defconfig_arm64-gcc5.4
# Build took: 0:04:22.413138