# git rev-parse -q --verify 36686e99e6e09c4043c34cf0c44f84f1e52f7ac9^{commit}
36686e99e6e09c4043c34cf0c44f84f1e52f7ac9
already have revision, skipping fetch
# git checkout -q -f -B kisskb 36686e99e6e09c4043c34cf0c44f84f1e52f7ac9
# git clean -qxdf
# < git log -1
# commit 36686e99e6e09c4043c34cf0c44f84f1e52f7ac9
# Author: Haren Myneni <haren@linux.ibm.com>
# Date:   Thu Jun 22 00:42:46 2023 -0700
# 
#     powerpc/pseries/vas: Hold mmap_mutex after mmap lock during window close
#     
#     VAS mmap (coproc_mmap()) and its fault handler (vas_mmap_fault())
#     are called after holding mmap lock and acquire mmap_mutex to
#     update VAS window status. The migration / DLPAR window close can
#     hang while trying to acquire mmap lock if it is issued at the
#     same time with the user space ioctl mmap or VAS fault handler
#     execution.
#     
#     So this patch adds changes to acquire mmap lock before holding
#     mmap_mutex.
#     
#     Fixes: 8ef7b9e1765a ("powerpc/pseries/vas: Close windows with DLPAR core removal")
#     Signed-off-by: Haren Myneni <haren@linux.ibm.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://msgid.link/20230622074246.144729-1-haren@linux.ibm.com
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 36686e99e6e09c4043c34cf0c44f84f1e52f7ac9
# make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_83xx_mpc8315_rdb_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  83xx/mpc8315_rdb_defconfig
# < make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_83xx_mpc8315_rdb_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_83xx_mpc8315_rdb_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_83xx_mpc8315_rdb_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_83xx_mpc8315_rdb_defconfig_powerpc-gcc5
# Build took: 0:01:29.696853