# git rev-parse -q --verify af3e9579ecfbe1796334bb25a2f0a6437983673a^{commit}
af3e9579ecfbe1796334bb25a2f0a6437983673a
already have revision, skipping fetch
# git checkout -q -f -B kisskb af3e9579ecfbe1796334bb25a2f0a6437983673a
# git clean -qxdf
# < git log -1
# commit af3e9579ecfbe1796334bb25a2f0a6437983673a
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sat Aug 6 13:24:56 2022 -0700
# 
#     Revert "iommu/dma: Add config for PCI SAC address trick"
#     
#     This reverts commit 4bf7fda4dce22214c70c49960b1b6438e6260b67.
#     
#     It turns out that it was hopelessly naive to think that this would work,
#     considering that we've always done this.  The first machine I actually
#     tested this on broke at bootup, getting to
#     
#         Reached target cryptsetup.target - Local Encrypted Volumes.
#     
#     and then hanging.  It's unclear what actually fails, since there's a lot
#     else going on around that time (eg amdgpu probing also happens around
#     that same time, but it could be some other random init thing that didn't
#     complete earlier and just caused the boot to hang at that point).
#     
#     The expectations that we should default to some unsafe and untested mode
#     seems entirely unfounded, and the belief that this wouldn't affect
#     modern systems is clearly entirely false.  The machine in question is
#     about two years old, so it's not exactly shiny, but it's also not some
#     dusty old museum piece PDP-11 in a closet.
#     
#     Cc: Robin Murphy <robin.murphy@arm.com>
#     Cc: Christoph Hellwig <hch@lst.de>
#     Cc: John Garry <john.garry@huawei.com>
#     Cc: Joerg Roedel <jroedel@suse.de>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/hppa-linux/bin/hppa-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/hppa-linux/bin/hppa-linux-ld --version
# < git log --format=%s --max-count=1 af3e9579ecfbe1796334bb25a2f0a6437983673a
# < make -s -j 120 ARCH=parisc O=/kisskb/build/linus_generic-32bit_defconfig_parisc-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/hppa-linux/bin/hppa-linux-  generic-32bit_defconfig
# < make -s -j 120 ARCH=parisc O=/kisskb/build/linus_generic-32bit_defconfig_parisc-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/hppa-linux/bin/hppa-linux-  help
# make -s -j 120 ARCH=parisc O=/kisskb/build/linus_generic-32bit_defconfig_parisc-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/hppa-linux/bin/hppa-linux-  olddefconfig
# make -s -j 120 ARCH=parisc O=/kisskb/build/linus_generic-32bit_defconfig_parisc-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/hppa-linux/bin/hppa-linux-  
/kisskb/src/arch/parisc/kernel/vdso32/Makefile:30: FORCE prerequisite is missing
Completed OK
# rm -rf /kisskb/build/linus_generic-32bit_defconfig_parisc-gcc11
# Build took: 0:00:33.111619