# 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/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-gcc --version
# < /opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-ld --version
# < git log --format=%s --max-count=1 12f363511d47f86c49b7766c349989cb33fd61a8
# < make -s -j 8 ARCH=mips O=/kisskb/build/powerpc-fixes_mips-defconfig_mipsel CROSS_COMPILE=/opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-  defconfig
# make -s -j 8 ARCH=mips O=/kisskb/build/powerpc-fixes_mips-defconfig_mipsel CROSS_COMPILE=/opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-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/sunrpc/xprtsock.c: In function 'xs_read_stream_request.constprop':
/kisskb/src/net/sunrpc/xprtsock.c:525:10: warning: 'read' may be used uninitialized in this function [-Wmaybe-uninitialized]
   return 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;
         ^
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",
      ^
<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]
FIT description: Linux 5.1.0-rc2-g12f363511d47
Created:         Thu May  2 17:33:40 2019
 Image 0 (kernel@0)
  Description:  Linux 5.1.0-rc2-g12f363511d47
  Created:      Thu May  2 17:33:40 2019
  Type:         Kernel Image
  Compression:  gzip compressed
  Data Size:    4547381 Bytes = 4440.80 KiB = 4.34 MiB
  Architecture: MIPS
  OS:           Linux
  Load Address: 0x80100000
  Entry Point:  0x80867490
  Hash algo:    sha1
  Hash value:   884c5d54c5a939f2df8bfc9df8cfdf2c161564a1
 Image 1 (fdt@boston)
  Description:  img,boston Device Tree
  Created:      Thu May  2 17:33:40 2019
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    3793 Bytes = 3.70 KiB = 0.00 MiB
  Architecture: MIPS
  Hash algo:    sha1
  Hash value:   4799f50d688573234da6e9d7701234d394759ef4
 Image 2 (fdt@ni169445)
  Description:  NI 169445 device tree
  Created:      Thu May  2 17:33:40 2019
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    1871 Bytes = 1.83 KiB = 0.00 MiB
  Architecture: MIPS
  Hash algo:    sha1
  Hash value:   51b89b31605ee62038c8468c429af091dfc75ec7
 Image 3 (fdt@xilfpga)
  Description:  MIPSfpga (xilfpga) Device Tree
  Created:      Thu May  2 17:33:40 2019
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    2708 Bytes = 2.64 KiB = 0.00 MiB
  Architecture: MIPS
  Hash algo:    sha1
  Hash value:   63d058b780f65e22da30f0a183433765f1807f1d
 Default Configuration: 'conf@default'
 Configuration 0 (conf@default)
  Description:  Generic Linux kernel
  Kernel:       kernel@0
 Configuration 1 (conf@boston)
  Description:  Boston Linux kernel
  Kernel:       kernel@0
  FDT:          fdt@boston
 Configuration 2 (conf@ni169445)
  Description:  NI 169445 Linux Kernel
  Kernel:       kernel@0
  FDT:          fdt@ni169445
 Configuration 3 (conf@xilfpga)
  Description:  MIPSfpga Linux kernel
  Kernel:       kernel@0
  FDT:          fdt@xilfpga
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_mips-defconfig_mipsel
# Build took: 0:02:46.446923