# git rev-parse -q --verify 274cb1ca2e7ce02cab56f5f4c61a74aeb566f931^{commit} 274cb1ca2e7ce02cab56f5f4c61a74aeb566f931 already have revision, skipping fetch # git checkout -q -f -B kisskb 274cb1ca2e7ce02cab56f5f4c61a74aeb566f931 # git clean -qxdf # < git log -1 # commit 274cb1ca2e7ce02cab56f5f4c61a74aeb566f931 # Author: Nathan Lynch # Date: Mon Mar 15 03:00:45 2021 -0500 # # powerpc/pseries/mobility: handle premature return from H_JOIN # # The pseries join/suspend sequence in its current form was written with # the assumption that it was the only user of H_PROD and that it needn't # handle spurious successful returns from H_JOIN. That's wrong; # powerpc's paravirt spinlock code uses H_PROD, and CPUs entering # do_join() can be woken prematurely from H_JOIN with a status of # H_SUCCESS as a result. This causes all CPUs to exit the sequence # early, preventing suspend from occurring at all. # # Add a 'done' boolean flag to the pseries_suspend_info struct, and have # the waking thread set it before waking the other threads. Threads # which receive H_SUCCESS from H_JOIN retry if the 'done' flag is still # unset. # # Fixes: 9327dc0aeef3 ("powerpc/pseries/mobility: use stop_machine for join/suspend") # Signed-off-by: Nathan Lynch # Signed-off-by: Michael Ellerman # Link: https://lore.kernel.org/r/20210315080045.460331-3-nathanl@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 274cb1ca2e7ce02cab56f5f4c61a74aeb566f931 # < make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_83xx_mpc834x_itx_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- 83xx/mpc834x_itx_defconfig # < make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_83xx_mpc834x_itx_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- help # make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_83xx_mpc834x_itx_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- olddefconfig # make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_83xx_mpc834x_itx_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- INFO: Uncompressed kernel (size 0x71b2bc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x800000) INFO: Uncompressed kernel (size 0x71b2bc) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x800000) INFO: Uncompressed kernel (size 0x70acac) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x800000) Image Name: Linux-5.12.0-rc2-g274cb1ca2e7c Created: Tue Mar 23 23:31:27 2021 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3190594 Bytes = 3115.81 KiB = 3.04 MiB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-5.12.0-rc2-g274cb1ca2e7c Created: Tue Mar 23 23:31:27 2021 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3219236 Bytes = 3143.79 KiB = 3.07 MiB Load Address: 00800000 Entry Point: 00800294 Image Name: Linux-5.12.0-rc2-g274cb1ca2e7c Created: Tue Mar 23 23:31:27 2021 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3218502 Bytes = 3143.07 KiB = 3.07 MiB Load Address: 00800000 Entry Point: 00800294 Completed OK # rm -rf /kisskb/build/powerpc-fixes_83xx_mpc834x_itx_defconfig_powerpc-gcc5 # Build took: 0:00:33.272871