# git rev-parse -q --verify a02cbc7ffe529ed58b6bbe54652104fc2c88bd77^{commit}
a02cbc7ffe529ed58b6bbe54652104fc2c88bd77
already have revision, skipping fetch
# git checkout -q -f -B kisskb a02cbc7ffe529ed58b6bbe54652104fc2c88bd77
# git clean -qxdf
# < git log -1
# commit a02cbc7ffe529ed58b6bbe54652104fc2c88bd77
# Author: Michael Ellerman <mpe@ellerman.id.au>
# Date:   Mon Oct 14 13:30:43 2019 +1100
# 
#     selftests/powerpc: Fixup clobbers for TM tests
#     
#     Some of our TM (Transactional Memory) tests, list "r1" (the stack
#     pointer) as a clobbered register.
#     
#     GCC >= 9 doesn't accept this, and the build breaks:
#     
#       ptrace-tm-spd-tar.c: In function 'tm_spd_tar':
#       ptrace-tm-spd-tar.c:31:2: error: listing the stack pointer register 'r1' in a clobber list is deprecated [-Werror=deprecated]
#          31 |  asm __volatile__(
#             |  ^~~
#       ptrace-tm-spd-tar.c:31:2: note: the value of the stack pointer after an 'asm' statement must be the same as it was before the statement
#     
#     We do have some fairly large inline asm blocks in these tests, and
#     some of them do change the value of r1. However they should all return
#     to C with the value in r1 restored, so I think it's legitimate to say
#     r1 is not clobbered.
#     
#     As Segher points out, the r1 clobbers may have been added because of
#     the use of `or 1,1,1`, however that doesn't actually clobber r1.
#     
#     Segher also points out that some of these tests do clobber LR, because
#     they call functions, and that is not listed in the clobbers, so add
#     that where appropriate.
#     
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20191029095324.14669-1-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 a02cbc7ffe529ed58b6bbe54652104fc2c88bd77
# < 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:38: LSE atomics not supported by binutils
arch/arm64/Makefile:62: CROSS_COMPILE_COMPAT not defined or empty, the compat vDSO will not be built
/kisskb/src/drivers/i2c/busses/i2c-sh_mobile.c: In function 'sh_mobile_i2c_isr':
/kisskb/src/drivers/i2c/busses/i2c-sh_mobile.c:399:26: warning: 'data' may be used uninitialized in this function [-Wmaybe-uninitialized]
   pd->msg->buf[real_pos] = data;
                          ^
/kisskb/src/drivers/i2c/busses/i2c-sh_mobile.c:372:16: note: 'data' was declared here
  unsigned char data;
                ^
In file included from /kisskb/src/include/linux/list.h:9:0,
                 from /kisskb/src/include/linux/wait.h:7,
                 from /kisskb/src/include/linux/wait_bit.h:8,
                 from /kisskb/src/include/linux/fs.h:6,
                 from /kisskb/src/fs/btrfs/send.c:7:
/kisskb/src/fs/btrfs/send.c: In function 'process_extent':
/kisskb/src/include/linux/kernel.h:37:33: warning: 'clone_src_i_size' may be used uninitialized in this function [-Wmaybe-uninitialized]
 #define IS_ALIGNED(x, a)  (((x) & ((typeof(x))(a) - 1)) == 0)
                                 ^
/kisskb/src/fs/btrfs/send.c:5088:6: note: 'clone_src_i_size' was declared here
  u64 clone_src_i_size;
      ^
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:14,
                 from /kisskb/src/drivers/tty/serial/sh-sci.c:24:
/kisskb/src/drivers/tty/serial/sh-sci.c: In function 'sci_dma_rx_submit':
/kisskb/src/include/linux/spinlock.h:288:3: 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:1351:16: note: 'flags' was declared here
  unsigned long flags;
                ^
Completed OK
# rm -rf /kisskb/build/powerpc-next_arm64-defconfig_arm64-gcc5.4
# Build took: 0:04:29.300347