# git rev-parse -q --verify acc48fec3ae30fd2c049c39582e1c4fdf25480ee^{commit}
acc48fec3ae30fd2c049c39582e1c4fdf25480ee
already have revision, skipping fetch
# git checkout -q -f -B kisskb acc48fec3ae30fd2c049c39582e1c4fdf25480ee
# git clean -qxdf
# < git log -1
# commit acc48fec3ae30fd2c049c39582e1c4fdf25480ee
# Author: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
# Date:   Thu Mar 11 14:45:38 2021 +0530
# 
#     powerpc/uprobes: Validation for prefixed instruction
#     
#     As per ISA 3.1, prefixed instruction should not cross 64-byte
#     boundary. So don't allow Uprobe on such prefixed instruction.
#     
#     There are two ways probed instruction is changed in mapped pages.
#     First, when Uprobe is activated, it searches for all the relevant
#     pages and replace instruction in them. In this case, if that probe
#     is on the 64-byte unaligned prefixed instruction, error out
#     directly. Second, when Uprobe is already active and user maps a
#     relevant page via mmap(), instruction is replaced via mmap() code
#     path. But because Uprobe is invalid, entire mmap() operation can
#     not be stopped. In this case just print an error and continue.
#     
#     Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
#     Acked-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
#     Acked-by: Sandipan Das <sandipan@linux.ibm.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20210311091538.368590-1-ravi.bangoria@linux.ibm.com
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/alpha-linux/bin/alpha-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/alpha-linux/bin/alpha-linux-ld --version
# < git log --format=%s --max-count=1 acc48fec3ae30fd2c049c39582e1c4fdf25480ee
# < make -s -j 48 ARCH=alpha O=/kisskb/build/powerpc-next_alpha-defconfig_alpha-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/alpha-linux/bin/alpha-linux-  defconfig
# < make -s -j 48 ARCH=alpha O=/kisskb/build/powerpc-next_alpha-defconfig_alpha-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/alpha-linux/bin/alpha-linux-  help
# make -s -j 48 ARCH=alpha O=/kisskb/build/powerpc-next_alpha-defconfig_alpha-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/alpha-linux/bin/alpha-linux-  olddefconfig
# make -s -j 48 ARCH=alpha O=/kisskb/build/powerpc-next_alpha-defconfig_alpha-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/alpha-linux/bin/alpha-linux-  
<stdin>:1511:2: warning: #warning syscall clone3 not implemented [-Wcpp]
WARNING: modpost: "saved_config" [vmlinux] is COMMON symbol
  Kernel arch/alpha/boot/vmlinux.gz is ready
Completed OK
# rm -rf /kisskb/build/powerpc-next_alpha-defconfig_alpha-gcc4.9
# Build took: 0:00:47.626580