# git rev-parse -q --verify 896066aa0685af3434637998b76218c2045142a8^{commit}
896066aa0685af3434637998b76218c2045142a8
already have revision, skipping fetch
# git checkout -q -f -B kisskb 896066aa0685af3434637998b76218c2045142a8
# git clean -qxdf
# < git log -1
# commit 896066aa0685af3434637998b76218c2045142a8
# Author: Harish <harish@linux.ibm.com>
# Date:   Thu Jun 25 22:27:21 2020 +0530
# 
#     selftests/powerpc: Fix build failure in ebb tests
#     
#     We use OUTPUT directory as TMPOUT for checking no-pie option.
#     
#     Since commit f2f02ebd8f38 ("kbuild: improve cc-option to clean up all
#     temporary files") when building powerpc/ from selftests directory, the
#     OUTPUT directory points to powerpc/pmu/ebb/ and gets removed when
#     checking for -no-pie option in try-run routine, subsequently build
#     fails with the following:
#     
#       $ make -C powerpc
#       ...
#       TARGET=ebb; BUILD_TARGET=$OUTPUT/$TARGET; mkdir -p $BUILD_TARGET; make OUTPUT=$BUILD_TARGET -k -C $TARGET all
#       make[2]: Entering directory '/home/linux-master/tools/testing/selftests/powerpc/pmu/ebb'
#       make[2]: *** No rule to make target 'Makefile'.
#       make[2]: Failed to remake makefile 'Makefile'.
#       make[2]: *** No rule to make target 'ebb.c', needed by '/home/linux-master/tools/testing/selftests/powerpc/pmu/ebb/reg_access_test'.
#       make[2]: *** No rule to make target 'ebb_handler.S', needed by '/home/linux-master/tools/testing/selftests/powerpc/pmu/ebb/reg_access_test'.
#       make[2]: *** No rule to make target 'trace.c', needed by '/home/linux-master/tools/testing/selftests/powerpc/pmu/ebb/reg_access_test'.
#       make[2]: *** No rule to make target 'busy_loop.S', needed by '/home/linux-master/tools/testing/selftests/powerpc/pmu/ebb/reg_access_test'.
#       make[2]: Target 'all' not remade because of errors.
#     
#     Fix this by adding a suffix to the OUTPUT directory so that the
#     failure is avoided.
#     
#     Fixes: 9686813f6e9d ("selftests/powerpc: Fix try-run when source tree is not writable")
#     Signed-off-by: Harish <harish@linux.ibm.com>
#     [mpe: Mention that commit that triggered the breakage]
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20200625165721.264904-1-harish@linux.ibm.com
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux-ld --version
# < git log --format=%s --max-count=1 896066aa0685af3434637998b76218c2045142a8
# < make -s -j 48 ARCH=ia64 O=/kisskb/build/powerpc-fixes_ia64-defconfig_ia64-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux-  defconfig
# < make -s -j 48 ARCH=ia64 O=/kisskb/build/powerpc-fixes_ia64-defconfig_ia64-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux-  help
# make -s -j 48 ARCH=ia64 O=/kisskb/build/powerpc-fixes_ia64-defconfig_ia64-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux-  olddefconfig
# make -s -j 48 ARCH=ia64 O=/kisskb/build/powerpc-fixes_ia64-defconfig_ia64-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/ia64-linux/bin/ia64-linux-  
<stdin>:1511:2: warning: #warning syscall clone3 not implemented [-Wcpp]
In file included from /kisskb/src/arch/ia64/include/uapi/asm/intrinsics.h:22:0,
                 from /kisskb/src/arch/ia64/include/asm/intrinsics.h:11,
                 from /kisskb/src/arch/ia64/include/asm/bitops.h:19,
                 from /kisskb/src/include/linux/bitops.h:29,
                 from /kisskb/src/include/linux/kernel.h:12,
                 from /kisskb/src/include/linux/list.h:9,
                 from /kisskb/src/include/linux/preempt.h:11,
                 from /kisskb/src/include/linux/spinlock.h:51,
                 from /kisskb/src/include/linux/seqlock.h:36,
                 from /kisskb/src/include/linux/time.h:6,
                 from /kisskb/src/fs/nfs/read.c:11:
/kisskb/src/fs/nfs/read.c: In function 'nfs_read_completion':
/kisskb/src/arch/ia64/include/uapi/asm/cmpxchg.h:57:2: warning: value computed is not used [-Wunused-value]
 ((__typeof__(*(ptr))) __xchg((unsigned long) (x), (ptr), sizeof(*(ptr))))
  ^
/kisskb/src/fs/nfs/read.c:196:5: note: in expansion of macro 'xchg'
     xchg(&nfs_req_openctx(req)->error, error);
     ^
/kisskb/src/fs/nfs/read.c: In function 'nfs_readpage':
/kisskb/src/arch/ia64/include/uapi/asm/cmpxchg.h:57:2: warning: value computed is not used [-Wunused-value]
 ((__typeof__(*(ptr))) __xchg((unsigned long) (x), (ptr), sizeof(*(ptr))))
  ^
/kisskb/src/fs/nfs/read.c:355:2: note: in expansion of macro 'xchg'
  xchg(&ctx->error, 0);
  ^
No errors detected in 22248 functions.
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_ia64-defconfig_ia64-gcc4.9
# Build took: 0:02:16.117852