Buildresult: linus/skiroot_defconfig/powerpc-gcc5 built on Sep 3 2023, 05:29

kisskb

Revisions | Branches | Compilers | Configs | Build Results | Build Failures |

Status:	OK
Date/Time:	Sep 3 2023, 05:29
Duration:	0:01:01.420735
Builder:	ka4
Revision:	mm/pagewalk: fix bootstopping regression from extra pte_unmap() (`ee40d543e97d23d3392d8fb1ec9972eb4e9c7611)`
Target:	linus/skiroot_defconfig/powerpc-gcc5
Branch:	linus
Compiler:	powerpc-gcc5 (powerpc64-linux-gcc (GCC) 5.5.0 / GNU ld (GNU Binutils) 2.29.1.20170915)
Config:	skiroot_defconfig (download)
Log:	Download original Possible warnings (5) fs/btrfs/volumes.c:5245:34: warning: 'dev_offset' may be used uninitialized in this function [-Wmaybe-uninitialized] fs/btrfs/volumes.c:5246:33: warning: 'max_avail' may be used uninitialized in this function [-Wmaybe-uninitialized] fs/btrfs/extent_io.c:3019:19: warning: 'last_extent_end' may be used uninitialized in this function [-Wmaybe-uninitialized] cc1: warning: unrecognized command line option '-Wno-shift-negative-value' cc1: warning: unrecognized command line option '-Wno-shift-negative-value' Full Log # git rev-parse -q --verify ee40d543e97d23d3392d8fb1ec9972eb4e9c7611^{commit} ee40d543e97d23d3392d8fb1ec9972eb4e9c7611 already have revision, skipping fetch # git checkout -q -f -B kisskb ee40d543e97d23d3392d8fb1ec9972eb4e9c7611 # git clean -qxdf # < git log -1 # commit ee40d543e97d23d3392d8fb1ec9972eb4e9c7611 # Author: Hugh Dickins <hughd@google.com> # Date: Sat Sep 2 08:29:30 2023 -0700 # # mm/pagewalk: fix bootstopping regression from extra pte_unmap() # # Mikhail reports early-6.6-based Fedora Rawhide not booting: "rcu_preempt # detected expedited stalls", minutes wait, and then hung_task splat while # kworker trying to synchronize_rcu_expedited(). Nothing logged to disk. # # He bisected to my 6.6 a349d72fd9ef ("mm/pgtable: add rcu_read_lock() and # rcu_read_unlock()s"): but the one to blame is my 6.5 commit to fix the # espfix "bad pmd" warnings when booting x86_64 with CONFIG_EFI_PGT_DUMP=y. # # Gaah, that added an "addr >= TASK_SIZE" check to avoid pte_offset_map(), # but failed to add the equivalent check when choosing to pte_unmap(). # # It's not a problem on 6.5 (for different reasons, it's harmless on both # 64-bit and 32-bit), but becomes a bootstopper on 6.6 with the unbalanced # rcu_read_unlock() - RCU has a WARN_ON_ONCE for that, but it would have # scrolled off Mikhail's console too quickly. # # Reported-by: Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com> # Closes: https://lore.kernel.org/linux-mm/CABXGCsNi8Tiv5zUPNXr6UJw6qV1VdaBEfGqEAMkkXE3QPvZuAQ@mail.gmail.com/ # Fixes: 8b1cb4a2e819 ("mm/pagewalk: fix EFI_PGT_DUMP of espfix area") # Fixes: a349d72fd9ef ("mm/pgtable: add rcu_read_lock() and rcu_read_unlock()s") # Signed-off-by: Hugh Dickins <hughd@google.com> # Tested-by: Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com> # Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> # < /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 ee40d543e97d23d3392d8fb1ec9972eb4e9c7611 # make -s -j 40 ARCH=powerpc O=/kisskb/build/linus_skiroot_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- skiroot_defconfig # < make -s -j 40 ARCH=powerpc O=/kisskb/build/linus_skiroot_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- help # make -s -j 40 ARCH=powerpc O=/kisskb/build/linus_skiroot_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- olddefconfig # make -s -j 40 ARCH=powerpc O=/kisskb/build/linus_skiroot_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- /kisskb/src/fs/btrfs/volumes.c: In function 'gather_device_info': /kisskb/src/fs/btrfs/volumes.c:5245:34: warning: 'dev_offset' may be used uninitialized in this function [-Wmaybe-uninitialized] devices_info[ndevs].dev_offset = dev_offset; ^ /kisskb/src/fs/btrfs/volumes.c:5246:33: warning: 'max_avail' may be used uninitialized in this function [-Wmaybe-uninitialized] devices_info[ndevs].max_avail = max_avail; ^ /kisskb/src/fs/btrfs/extent_io.c: In function 'extent_fiemap': /kisskb/src/fs/btrfs/extent_io.c:3019:19: warning: 'last_extent_end' may be used uninitialized in this function [-Wmaybe-uninitialized] if (cache.cached && cache.offset + cache.len >= last_extent_end) { ^ /kisskb/src/fs/btrfs/extent_io.c: At top level: cc1: warning: unrecognized command line option '-Wno-shift-negative-value' /kisskb/src/fs/btrfs/volumes.c: At top level: cc1: warning: unrecognized command line option '-Wno-shift-negative-value' Completed OK # rm -rf /kisskb/build/linus_skiroot_defconfig_powerpc-gcc5 # Build took: 0:01:01.420735

© Michael Ellerman 2006-2018.