# 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 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_85xx_tqm8555_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  85xx/tqm8555_defconfig
# make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_85xx_tqm8555_defconfig_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]
In file included from /kisskb/src/include/linux/printk.h:7:0,
                 from /kisskb/src/include/linux/kernel.h:15,
                 from /kisskb/src/include/linux/fs_context.h:15,
                 from /kisskb/src/fs/fs_parser.c:13:
/kisskb/src/fs/fs_parser.c: In function 'fs_validate_description':
/kisskb/src/include/linux/kern_levels.h:5:18: warning: format '%lu' expects argument of type 'long unsigned int', but argument 3 has type 'int' [-Wformat=]
 #define KERN_SOH "\001"  /* ASCII Start Of Header */
                  ^
/kisskb/src/include/linux/kern_levels.h:11:18: note: in expansion of macro 'KERN_SOH'
 #define KERN_ERR KERN_SOH "3" /* error conditions */
                  ^
/kisskb/src/include/linux/printk.h:302:9: note: in expansion of macro 'KERN_ERR'
  printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
         ^
/kisskb/src/fs/fs_parser.c:413:6: note: in expansion of macro 'pr_err'
      pr_err("VALIDATE %s: e[%lu] enum val for %s\n",
      ^
/kisskb/src/net/sunrpc/xprtsock.c: In function 'xs_stream_data_receive_workfn':
/kisskb/src/net/sunrpc/xprtsock.c:498:15: warning: 'read' may be used uninitialized in this function [-Wmaybe-uninitialized]
  size_t want, read;
               ^
/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;
          ^
INFO: Uncompressed kernel (size 0x4f68b0) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x500000)
INFO: Uncompressed kernel (size 0x4e6188) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x500000)
Image Name:   Linux-5.1.0-rc2-g12f363511d47
Created:      Thu May  2 19:11:27 2019
Image Type:   PowerPC Linux Kernel Image (gzip compressed)
Data Size:    2545115 Bytes = 2485.46 KiB = 2.43 MiB
Load Address: 00000000
Entry Point:  00000000
Image Name:   Linux-5.1.0-rc2-g12f363511d47
Created:      Thu May  2 19:11:27 2019
Image Type:   PowerPC Linux Kernel Image (gzip compressed)
Data Size:    2575046 Bytes = 2514.69 KiB = 2.46 MiB
Load Address: 00500000
Entry Point:  00500314
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_85xx_tqm8555_defconfig_powerpc-gcc5
# Build took: 0:00:45.801426