# git rev-parse -q --verify ce9f98c0229de93b6b90bcf3deb536f922ad893a^{commit}
ce9f98c0229de93b6b90bcf3deb536f922ad893a
already have revision, skipping fetch
# git checkout -q -f -B kisskb ce9f98c0229de93b6b90bcf3deb536f922ad893a
# git clean -qxdf
# < git log -1
# commit ce9f98c0229de93b6b90bcf3deb536f922ad893a
# Author: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
# Date:   Wed Aug 26 02:40:29 2020 -0400
# 
#     powerpc/perf: Fix reading of MSR[HV/PR] bits in trace-imc
#     
#     IMC trace-mode uses MSR[HV/PR] bits to set the cpumode for the
#     instruction pointer captured in each sample. The bits are fetched from
#     the third double word of the trace record. Reading third double word
#     from IMC trace record should use be64_to_cpu() along with READ_ONCE
#     inorder to fetch correct MSR[HV/PR] bits. Patch addresses this change.
#     
#     Currently we are using PERF_RECORD_MISC_HYPERVISOR as cpumode if MSR
#     HV is 1 and PR is 0 which means the address is from host counter. But
#     using PERF_RECORD_MISC_HYPERVISOR for host counter data will fail to
#     resolve the address -> symbol during "perf report" because perf tools
#     side uses PERF_RECORD_MISC_KERNEL to represent the host counter data.
#     Therefore, fix the trace imc sample data to use
#     PERF_RECORD_MISC_KERNEL as cpumode for host kernel information.
#     
#     Fixes: 77ca3951cc37 ("powerpc/perf: Add kernel support for new MSR[HV PR] bits in trace-imc")
#     Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/1598424029-1662-1-git-send-email-atrajeev@linux.vnet.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 ce9f98c0229de93b6b90bcf3deb536f922ad893a
# < 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/timex.h:14,
                 from /kisskb/src/include/linux/timex.h:65,
                 from /kisskb/src/include/linux/time32.h:13,
                 from /kisskb/src/include/linux/time.h:73,
                 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 22420 functions.
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_ia64-defconfig_ia64-gcc4.9
# Build took: 0:02:30.775240