# git rev-parse -q --verify c0842fbc1b18c7a044e6ff3e8fa78bfa822c7d1a^{commit}
c0842fbc1b18c7a044e6ff3e8fa78bfa822c7d1a
already have revision, skipping fetch
# git checkout -q -f -B kisskb c0842fbc1b18c7a044e6ff3e8fa78bfa822c7d1a
# git clean -qxdf
# < git log -1
# commit c0842fbc1b18c7a044e6ff3e8fa78bfa822c7d1a
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Fri Jul 31 07:51:14 2020 +0200
# 
#     random32: move the pseudo-random 32-bit definitions to prandom.h
#     
#     The addition of percpu.h to the list of includes in random.h revealed
#     some circular dependencies on arm64 and possibly other platforms.  This
#     include was added solely for the pseudo-random definitions, which have
#     nothing to do with the rest of the definitions in this file but are
#     still there for legacy reasons.
#     
#     This patch moves the pseudo-random parts to linux/prandom.h and the
#     percpu.h include with it, which is now guarded by _LINUX_PRANDOM_H and
#     protected against recursive inclusion.
#     
#     A further cleanup step would be to remove this from <linux/random.h>
#     entirely, and make people who use the prandom infrastructure include
#     just the new header file.  That's a bit of a churn patch, but grepping
#     for "prandom_" and "next_pseudo_random32" "struct rnd_state" should
#     catch most users.
#     
#     But it turns out that that nice cleanup step is fairly painful, because
#     a _lot_ of code currently seems to depend on the implicit include of
#     <linux/random.h>, which can currently come in a lot of ways, including
#     such fairly core headfers as <linux/net.h>.
#     
#     So the "nice cleanup" part may or may never happen.
#     
#     Fixes: 1c9df907da83 ("random: fix circular include dependency on arm64 after addition of percpu.h")
#     Tested-by: Guenter Roeck <linux@roeck-us.net>
#     Acked-by: Willy Tarreau <w@1wt.eu>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-gcc --version
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-ld --version
# < git log --format=%s --max-count=1 c0842fbc1b18c7a044e6ff3e8fa78bfa822c7d1a
# < make -s -j 80 ARCH=arm O=/kisskb/build/linus_u8500_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  u8500_defconfig
# < make -s -j 80 ARCH=arm O=/kisskb/build/linus_u8500_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  help
# make -s -j 80 ARCH=arm O=/kisskb/build/linus_u8500_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  olddefconfig
# make -s -j 80 ARCH=arm O=/kisskb/build/linus_u8500_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  
Completed OK
# rm -rf /kisskb/build/linus_u8500_defconfig_arm-gcc4.9
# Build took: 0:01:35.754458