# git rev-parse -q --verify 505a8ec7e11ae5236c4a154a1e24ef49a8349600^{commit}
505a8ec7e11ae5236c4a154a1e24ef49a8349600
already have revision, skipping fetch
# git checkout -q -f -B kisskb 505a8ec7e11ae5236c4a154a1e24ef49a8349600
# git clean -qxdf
# < git log -1
# commit 505a8ec7e11ae5236c4a154a1e24ef49a8349600
# Author: Chris Wilson <chris@chris-wilson.co.uk>
# Date:   Thu Sep 12 13:56:34 2019 +0100
# 
#     Revert "drm/i915/userptr: Acquire the page lock around set_page_dirty()"
#     
#     The userptr put_pages can be called from inside try_to_unmap, and so
#     enters with the page lock held on one of the object's backing pages. We
#     cannot take the page lock ourselves for fear of recursion.
#     
#     Reported-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
#     Reported-by: Martin Wilck <Martin.Wilck@suse.com>
#     Reported-by: Leo Kraav <leho@kraav.com>
#     Fixes: aa56a292ce62 ("drm/i915/userptr: Acquire the page lock around set_page_dirty()")
#     References: https://bugzilla.kernel.org/show_bug.cgi?id=203317
#     Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
#     Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
#     Cc: Jani Nikula <jani.nikula@intel.com>
#     Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
#     Cc: stable@vger.kernel.org
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 505a8ec7e11ae5236c4a154a1e24ef49a8349600
# < make -s -j 48 ARCH=um O=/kisskb/build/linus_um-defconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 defconfig
# make -s -j 48 ARCH=um O=/kisskb/build/linus_um-defconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 
/kisskb/src/arch/um/os-Linux/signal.c: In function 'timer_real_alarm_handler':
/kisskb/src/arch/um/os-Linux/signal.c:93:1: warning: the frame size of 2960 bytes is larger than 1024 bytes [-Wframe-larger-than=]
 }
 ^
/kisskb/src/arch/um/os-Linux/signal.c: In function 'sig_handler_common':
/kisskb/src/arch/um/os-Linux/signal.c:51:1: warning: the frame size of 2960 bytes is larger than 1024 bytes [-Wframe-larger-than=]
 }
 ^
  LINK linux
Completed OK
# rm -rf /kisskb/build/linus_um-defconfig_um-x86_64
# Build took: 0:00:37.353388