# git rev-parse -q --verify e8c42ba3ffd9708cc2fab3fb57deeb1604202e7e^{commit}
e8c42ba3ffd9708cc2fab3fb57deeb1604202e7e
already have revision, skipping fetch
# git checkout -q -f -B kisskb e8c42ba3ffd9708cc2fab3fb57deeb1604202e7e
# git clean -qxdf
# < git log -1
# commit e8c42ba3ffd9708cc2fab3fb57deeb1604202e7e
# Author: Christophe Leroy <christophe.leroy@c-s.fr>
# Date:   Mon Aug 19 06:40:25 2019 +0000
# 
#     powerpc/603: Fix handling of the DIRTY flag
#     
#     If a page is already mapped RW without the DIRTY flag, the DIRTY
#     flag is never set and a TLB store miss exception is taken forever.
#     
#     This is easily reproduced with the following app:
#     
#     void main(void)
#     {
#             volatile char *ptr = mmap(0, 4096, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, -1, 0);
#     
#             *ptr = *ptr;
#     }
#     
#     When DIRTY flag is not set, bail out of TLB miss handler and take
#     a minor page fault which will set the DIRTY flag.
#     
#     Fixes: f8b58c64eaef ("powerpc/603: let's handle PAGE_DIRTY directly")
#     Cc: stable@vger.kernel.org # v5.1+
#     Reported-by: Doug Crawford <doug.crawford@intelight-its.com>
#     Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/80432f71194d7ee75b2f5043ecf1501cf1cca1f3.1566196646.git.christophe.leroy@c-s.fr
# < /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 e8c42ba3ffd9708cc2fab3fb57deeb1604202e7e
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_83xx_mpc832x_rdb_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  83xx/mpc832x_rdb_defconfig
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_83xx_mpc832x_rdb_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
INFO: Uncompressed kernel (size 0x5dd314) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x600000)
INFO: Uncompressed kernel (size 0x5ccbfc) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x600000)
Image Name:   Linux-5.3.0-rc2-ge8c42ba3ffd9
Created:      Tue Aug 20 20:19:27 2019
Image Type:   PowerPC Linux Kernel Image (gzip compressed)
Data Size:    2949804 Bytes = 2880.67 KiB = 2.81 MiB
Load Address: 00000000
Entry Point:  00000000
Image Name:   Linux-5.3.0-rc2-ge8c42ba3ffd9
Created:      Tue Aug 20 20:19:27 2019
Image Type:   PowerPC Linux Kernel Image (gzip compressed)
Data Size:    2979957 Bytes = 2910.11 KiB = 2.84 MiB
Load Address: 00600000
Entry Point:  00600294
Completed OK
# rm -rf /kisskb/build/powerpc-next_83xx_mpc832x_rdb_defconfig_powerpc-gcc5
# Build took: 0:00:42.923487