# git rev-parse -q --verify 12f363511d47f86c49b7766c349989cb33fd61a8^{commit}
12f363511d47f86c49b7766c349989cb33fd61a8
already have revision, skipping fetch
# git checkout -q -f -B kisskb 12f363511d47f86c49b7766c349989cb33fd61a8
# git clean -qxdf
# < git log -1
# commit 12f363511d47f86c49b7766c349989cb33fd61a8
# Author: Christophe Leroy <christophe.leroy@c-s.fr>
# Date:   Tue Apr 30 16:11:59 2019 +0000
# 
#     powerpc/32s: Fix BATs setting with CONFIG_STRICT_KERNEL_RWX
#     
#     Serge reported some crashes with CONFIG_STRICT_KERNEL_RWX enabled
#     on a book3s32 machine.
#     
#     Analysis shows two issues:
#       - BATs addresses and sizes are not properly aligned.
#       - There is a gap between the last address covered by BATs and the
#         first address covered by pages.
#     
#     Memory mapped with DBATs:
#     0: 0xc0000000-0xc07fffff 0x00000000 Kernel RO coherent
#     1: 0xc0800000-0xc0bfffff 0x00800000 Kernel RO coherent
#     2: 0xc0c00000-0xc13fffff 0x00c00000 Kernel RW coherent
#     3: 0xc1400000-0xc23fffff 0x01400000 Kernel RW coherent
#     4: 0xc2400000-0xc43fffff 0x02400000 Kernel RW coherent
#     5: 0xc4400000-0xc83fffff 0x04400000 Kernel RW coherent
#     6: 0xc8400000-0xd03fffff 0x08400000 Kernel RW coherent
#     7: 0xd0400000-0xe03fffff 0x10400000 Kernel RW coherent
#     
#     Memory mapped with pages:
#     0xe1000000-0xefffffff  0x21000000       240M        rw       present           dirty  accessed
#     
#     This patch fixes both issues. With the patch, we get the following
#     which is as expected:
#     
#     Memory mapped with DBATs:
#     0: 0xc0000000-0xc07fffff 0x00000000 Kernel RO coherent
#     1: 0xc0800000-0xc0bfffff 0x00800000 Kernel RO coherent
#     2: 0xc0c00000-0xc0ffffff 0x00c00000 Kernel RW coherent
#     3: 0xc1000000-0xc1ffffff 0x01000000 Kernel RW coherent
#     4: 0xc2000000-0xc3ffffff 0x02000000 Kernel RW coherent
#     5: 0xc4000000-0xc7ffffff 0x04000000 Kernel RW coherent
#     6: 0xc8000000-0xcfffffff 0x08000000 Kernel RW coherent
#     7: 0xd0000000-0xdfffffff 0x10000000 Kernel RW coherent
#     
#     Memory mapped with pages:
#     0xe0000000-0xefffffff  0x20000000       256M        rw       present           dirty  accessed
#     
#     Fixes: 63b2bc619565 ("powerpc/mm/32s: Use BATs for STRICT_KERNEL_RWX")
#     Reported-by: Serge Belyshev <belyshev@depni.sinp.msu.ru>
#     Acked-by: Segher Boessenkool <segher@kernel.crashing.org>
#     Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /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 12f363511d47f86c49b7766c349989cb33fd61a8
# < make -s -j 10 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pseries_defconfig+FA_DUMP_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  pseries_defconfig
# Added to kconfig CONFIG_CRASH_DUMP=y
# Added to kconfig CONFIG_FA_DUMP=y
# yes \n | make -s -j 10 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pseries_defconfig+FA_DUMP_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  oldconfig
yes: standard output: Broken pipe
# make -s -j 10 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pseries_defconfig+FA_DUMP_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
<stdin>:1478:2: warning: #warning syscall pidfd_send_signal not implemented [-Wcpp]
<stdin>:1481:2: warning: #warning syscall io_uring_setup not implemented [-Wcpp]
<stdin>:1484:2: warning: #warning syscall io_uring_enter not implemented [-Wcpp]
<stdin>:1487:2: warning: #warning syscall io_uring_register not implemented [-Wcpp]
/kisskb/src/net/netfilter/nf_nat_masquerade.c:15:21: warning: 'masq_refcnt6' defined but not used [-Wunused-variable]
 static unsigned int masq_refcnt6 __read_mostly;
                     ^
/kisskb/src/net/sunrpc/xprtsock.c: In function 'xs_stream_data_receive':
/kisskb/src/net/sunrpc/xprtsock.c:529:9: warning: 'ret' may be used uninitialized in this function [-Wmaybe-uninitialized]
  return ret < 0 ? ret : read;
         ^
/kisskb/src/net/sunrpc/xprtsock.c:499:10: note: 'ret' was declared here
  ssize_t ret;
          ^
/kisskb/src/net/sunrpc/xprtsock.c:498:15: warning: 'read' may be used uninitialized in this function [-Wmaybe-uninitialized]
  size_t want, read;
               ^
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_pseries_defconfig+FA_DUMP_powerpc-gcc5
# Build took: 0:05:55.964698