# git rev-parse -q --verify 1d1df41c5a33359a00e919d54eaebfb789711fdc^{commit}
1d1df41c5a33359a00e919d54eaebfb789711fdc
already have revision, skipping fetch
# git checkout -q -f -B kisskb 1d1df41c5a33359a00e919d54eaebfb789711fdc
# git clean -qxdf
# < git log -1
# commit 1d1df41c5a33359a00e919d54eaebfb789711fdc
# Merge: e9f5cbc0c851 5fed0be8583f
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Wed Jan 19 11:50:20 2022 +0200
# 
#     Merge tag 'f2fs-for-5.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs
#     
#     Pull f2fs updates from Jaegeuk Kim:
#      "In this round, we've tried to address some performance issues in
#       f2fs_checkpoint and direct IO flows. Also, there was a work to enhance
#       the page cache management used for compression. Other than them, we've
#       done typical work including sysfs, code clean-ups, tracepoint, sanity
#       check, in addition to bug fixes on corner cases.
#     
#       Enhancements:
#        - use iomap for direct IO
#        - try to avoid lock contention to improve f2fs_ckpt speed
#        - avoid unnecessary memory allocation in compression flow
#        - POSIX_FADV_DONTNEED drops the page cache containing compression
#          pages
#        - add some sysfs entries (gc_urgent_high_remaining, pending_discard)
#     
#       Bug fixes:
#        - try not to expose unwritten blocks to user by DIO (this was added
#          to avoid merge conflict; another patch is coming to address other
#          missing case)
#        - relax minor error condition for file pinning feature used in
#          Android OTA
#        - fix potential deadlock case in compression flow
#        - should not truncate any block on pinned file
#     
#       In addition, we've done some code clean-ups and tracepoint/sanity
#       check improvement"
#     
#     * tag 'f2fs-for-5.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (29 commits)
#       f2fs: do not allow partial truncation on pinned file
#       f2fs: remove redunant invalidate compress pages
#       f2fs: Simplify bool conversion
#       f2fs: don't drop compressed page cache in .{invalidate,release}page
#       f2fs: fix to reserve space for IO align feature
#       f2fs: fix to check available space of CP area correctly in update_ckpt_flags()
#       f2fs: support fault injection to f2fs_trylock_op()
#       f2fs: clean up __find_inline_xattr() with __find_xattr()
#       f2fs: fix to do sanity check on last xattr entry in __f2fs_setxattr()
#       f2fs: do not bother checkpoint by f2fs_get_node_info
#       f2fs: avoid down_write on nat_tree_lock during checkpoint
#       f2fs: compress: fix potential deadlock of compress file
#       f2fs: avoid EINVAL by SBI_NEED_FSCK when pinning a file
#       f2fs: add gc_urgent_high_remaining sysfs node
#       f2fs: fix to do sanity check in is_alive()
#       f2fs: fix to avoid panic in is_alive() if metadata is inconsistent
#       f2fs: fix to do sanity check on inode type during garbage collection
#       f2fs: avoid duplicate call of mark_inode_dirty
#       f2fs: show number of pending discard commands
#       f2fs: support POSIX_FADV_DONTNEED drop compressed page cache
#       ...
# < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/s390-linux/bin/s390-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/s390-linux/bin/s390-linux-ld --version
# < git log --format=%s --max-count=1 1d1df41c5a33359a00e919d54eaebfb789711fdc
# < make -s -j 32 ARCH=s390 O=/kisskb/build/linus_s390-defconfig_s390x-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/s390-linux/bin/s390-linux-  defconfig
# < make -s -j 32 ARCH=s390 O=/kisskb/build/linus_s390-defconfig_s390x-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/s390-linux/bin/s390-linux-  help
# make -s -j 32 ARCH=s390 O=/kisskb/build/linus_s390-defconfig_s390x-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/s390-linux/bin/s390-linux-  olddefconfig
# make -s -j 32 ARCH=s390 O=/kisskb/build/linus_s390-defconfig_s390x-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/s390-linux/bin/s390-linux-  
  MKDIR     /kisskb/build/linus_s390-defconfig_s390x-gcc11/tools/bpf/resolve_btfids/libbpf/
  MKDIR     /kisskb/build/linus_s390-defconfig_s390x-gcc11/tools/bpf/resolve_btfids//libsubcmd
  LINK     resolve_btfids
BTF: .tmp_vmlinux.btf: pahole version v1.12 is too old, need at least v1.16
Failed to generate BTF for vmlinux
Try to disable CONFIG_DEBUG_INFO_BTF
make[1]: *** [/kisskb/src/Makefile:1155: vmlinux] Error 1
make: *** [Makefile:219: __sub-make] Error 2
Command 'make -s -j 32 ARCH=s390 O=/kisskb/build/linus_s390-defconfig_s390x-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/s390-linux/bin/s390-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/linus_s390-defconfig_s390x-gcc11
# Build took: 0:02:58.219463