# git rev-parse -q --verify 0b2c8f8b6b0c7530e2866c95862546d0da2057b0^{commit}
0b2c8f8b6b0c7530e2866c95862546d0da2057b0
already have revision, skipping fetch
# git checkout -q -f -B kisskb 0b2c8f8b6b0c7530e2866c95862546d0da2057b0
# git clean -qxdf
# < git log -1
# commit 0b2c8f8b6b0c7530e2866c95862546d0da2057b0
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Fri Jan 4 10:23:10 2019 -0800
# 
#     i915: fix missing user_access_end() in page fault exception case
#     
#     When commit fddcd00a49e9 ("drm/i915: Force the slow path after a
#     user-write error") unified the error handling for various user access
#     problems, it didn't do the user_access_end() that is needed for the
#     unsafe_put_user() case.
#     
#     It's not a huge deal: a missed user_access_end() will only mean that
#     SMAP protection isn't active afterwards, and for the error case we'll be
#     returning to user mode soon enough anyway.  But it's wrong, and adding
#     the proper user_access_end() is trivial enough (and doing it for the
#     other error cases where it isn't needed doesn't hurt).
#     
#     I noticed it while doing the same prep-work for changing
#     user_access_begin() that precipitated the access_ok() changes in commit
#     96d4f267e40f ("Remove 'type' argument from access_ok() function").
#     
#     Fixes: fddcd00a49e9 ("drm/i915: Force the slow path after a user-write error")
#     Cc: Chris Wilson <chris@chris-wilson.co.uk>
#     Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
#     Cc: stable@kernel.org # v4.20
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 0b2c8f8b6b0c7530e2866c95862546d0da2057b0
# < make -s -j 48 ARCH=x86 O=/kisskb/build/linus_x86_64_defconfig_x86_64 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-  x86_64_defconfig
# make -s -j 48 ARCH=x86 O=/kisskb/build/linus_x86_64_defconfig_x86_64 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-  
You are building kernel with non-retpoline compiler.
Please update your compiler.
make[1]: *** [arch/x86/Makefile:300: checkbin] Error 1
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:152: sub-make] Error 2
Command 'make -s -j 48 ARCH=x86 O=/kisskb/build/linus_x86_64_defconfig_x86_64 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/linus_x86_64_defconfig_x86_64
# Build took: 0:00:02.755413