# git rev-parse -q --verify 598a597636f8618a0520fd3ccefedaed9e4709b0^{commit}
598a597636f8618a0520fd3ccefedaed9e4709b0
already have revision, skipping fetch
# git checkout -q -f -B kisskb 598a597636f8618a0520fd3ccefedaed9e4709b0
# git clean -qxdf
# < git log -1
# commit 598a597636f8618a0520fd3ccefedaed9e4709b0
# Merge: 58130a6cd062 2d9900f26ad6
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Thu Oct 29 10:13:09 2020 -0700
# 
#     Merge tag 'afs-fixes-20201029' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
#     
#     Pull AFS fixes from David Howells:
#     
#      - Fix copy_file_range() to an afs file now returning EINVAL if the
#        splice_write file op isn't supplied.
#     
#      - Fix a deref-before-check in afs_unuse_cell().
#     
#      - Fix a use-after-free in afs_xattr_get_acl().
#     
#      - Fix afs to not try to clear PG_writeback when laundering a page.
#     
#      - Fix afs to take a ref on a page that it sets PG_private on and to
#        drop that ref when clearing PG_private. This is done through recently
#        added helpers.
#     
#      - Fix a page leak if write_begin() fails.
#     
#      - Fix afs_write_begin() to not alter the dirty region info stored in
#        page->private, but rather do this in afs_write_end() instead when we
#        know what we actually changed.
#     
#      - Fix afs_invalidatepage() to alter the dirty region info on a page
#        when partial page invalidation occurs so that we don't inadvertantly
#        include a span of zeros that will get written back if a page gets
#        laundered due to a remote 3rd-party induced invalidation.
#     
#        We mustn't, however, reduce the dirty region if the page has been
#        seen to be mapped (ie. we got called through the page_mkwrite vector)
#        as the page might still be mapped and we might lose data if the file
#        is extended again.
#     
#      - Fix the dirty region info to have a lower resolution if the size of
#        the page is too large for this to be encoded (e.g. powerpc32 with 64K
#        pages).
#     
#        Note that this might not be the ideal way to handle this, since it
#        may allow some leakage of undirtied zero bytes to the server's copy
#        in the case of a 3rd-party conflict.
#     
#     To aid the last two fixes, two additional changes:
#     
#      - Wrap the manipulations of the dirty region info stored in
#        page->private into helper functions.
#     
#      - Alter the encoding of the dirty region so that the region bounds can
#        be stored with one fewer bit, making a bit available for the
#        indication of mappedness.
#     
#     * tag 'afs-fixes-20201029' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
#       afs: Fix dirty-region encoding on ppc32 with 64K pages
#       afs: Fix afs_invalidatepage to adjust the dirty region
#       afs: Alter dirty range encoding in page->private
#       afs: Wrap page->private manipulations in inline functions
#       afs: Fix where page->private is set during write
#       afs: Fix page leak on afs_write_begin() failure
#       afs: Fix to take ref on page when PG_private is set
#       afs: Fix afs_launder_page to not clear PG_writeback
#       afs: Fix a use after free in afs_xattr_get_acl()
#       afs: Fix tracing deref-before-check
#       afs: Fix copy_file_range()
# < /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 598a597636f8618a0520fd3ccefedaed9e4709b0
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/linus_44x_fsp2_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  44x/fsp2_defconfig
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/linus_44x_fsp2_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 48 ARCH=powerpc O=/kisskb/build/linus_44x_fsp2_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 48 ARCH=powerpc O=/kisskb/build/linus_44x_fsp2_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
In file included from /kisskb/src/kernel/rcu/update.c:578:0:
/kisskb/src/kernel/rcu/tasks.h:710:13: warning: 'show_rcu_tasks_rude_gp_kthread' defined but not used [-Wunused-function]
 static void show_rcu_tasks_rude_gp_kthread(void) {}
             ^
INFO: Uncompressed kernel (size 0xa74e64) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0xb00000)
Image Name:   Linux-5.10.0-rc1-g598a597636f8
Created:      Fri Oct 30 05:56:22 2020
Image Type:   PowerPC Linux Kernel Image (gzip compressed)
Data Size:    4560105 Bytes = 4453.23 KiB = 4.35 MiB
Load Address: 00000000
Entry Point:  00000000
Completed OK
# rm -rf /kisskb/build/linus_44x_fsp2_defconfig_powerpc-gcc5
# Build took: 0:01:10.992358