# git rev-parse -q --verify 92edf8df0ff2ae86cc632eeca0e651fd8431d40d^{commit}
92edf8df0ff2ae86cc632eeca0e651fd8431d40d
already have revision, skipping fetch
# git checkout -q -f -B kisskb 92edf8df0ff2ae86cc632eeca0e651fd8431d40d
# git clean -qxdf
# < git log -1
# commit 92edf8df0ff2ae86cc632eeca0e651fd8431d40d
# Author: Michael Ellerman <mpe@ellerman.id.au>
# Date:   Thu Mar 21 15:24:33 2019 +1100
# 
#     powerpc/security: Fix spectre_v2 reporting
#     
#     When I updated the spectre_v2 reporting to handle software count cache
#     flush I got the logic wrong when there's no software count cache
#     enabled at all.
#     
#     The result is that on systems with the software count cache flush
#     disabled we print:
#     
#       Mitigation: Indirect branch cache disabled, Software count cache flush
#     
#     Which correctly indicates that the count cache is disabled, but
#     incorrectly says the software count cache flush is enabled.
#     
#     The root of the problem is that we are trying to handle all
#     combinations of options. But we know now that we only expect to see
#     the software count cache flush enabled if the other options are false.
#     
#     So split the two cases, which simplifies the logic and fixes the bug.
#     We were also missing a space before "(hardware accelerated)".
#     
#     The result is we see one of:
#     
#       Mitigation: Indirect branch serialisation (kernel only)
#       Mitigation: Indirect branch cache disabled
#       Mitigation: Software count cache flush
#       Mitigation: Software count cache flush (hardware accelerated)
#     
#     Fixes: ee13cb249fab ("powerpc/64s: Add support for software count cache flush")
#     Cc: stable@vger.kernel.org # v4.19+
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Reviewed-by: Michael Neuling <mikey@neuling.org>
#     Reviewed-by: Diana Craciun <diana.craciun@nxp.com>
#     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 92edf8df0ff2ae86cc632eeca0e651fd8431d40d
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_obs600_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  40x/obs600_defconfig
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_obs600_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]
/kisskb/src/arch/powerpc/kernel/head_40x.S: Assembler messages:
/kisskb/src/arch/powerpc/kernel/head_40x.S:883: Warning: invalid register expression
/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;
          ^
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",
      ^
INFO: Uncompressed kernel (size 0x4bdb24) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x500000)
Image Name:   Linux-5.1.0-rc1-g92edf8df0ff2
Created:      Fri Mar 22 01:09:15 2019
Image Type:   PowerPC Linux Multi-File Image (gzip compressed)
Data Size:    2440310 Bytes = 2383.12 KiB = 2.33 MiB
Load Address: 00000000
Entry Point:  00000000
Contents:
   Image 0: 2433424 Bytes = 2376.39 KiB = 2.32 MiB
   Image 1: 3 Bytes = 0.00 KiB = 0.00 MiB
   Image 2: 6866 Bytes = 6.71 KiB = 0.01 MiB
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_40x_obs600_defconfig_powerpc-gcc5
# Build took: 0:00:34.336879