# git rev-parse -q --verify e4b79900222b8cccd4da4a7a89581f0e1b764ed2^{commit}
e4b79900222b8cccd4da4a7a89581f0e1b764ed2
already have revision, skipping fetch
# git checkout -q -f -B kisskb e4b79900222b8cccd4da4a7a89581f0e1b764ed2
# git clean -qxdf
# < git log -1
# commit e4b79900222b8cccd4da4a7a89581f0e1b764ed2
# Author: Michael Ellerman <mpe@ellerman.id.au>
# Date:   Tue Mar 13 15:58:11 2018 +1100
# 
#     powerpc/64s: Fix NULL AT_BASE_PLATFORM when using DT CPU features
#     
#     When running virtualised the powerpc kernel is able to run the system
#     in "compat mode" - which means the kernel and hardware are pretending
#     to userspace that the CPU is an older version than it actually is.
#     
#     AT_BASE_PLATFORM is an AUXV entry that we export to userspace for use
#     when we're running in that mode, which tells userspace the "platform"
#     string for the real CPU version, as opposed to the faked version.
#     
#     Although we don't support compat mode when using DT CPU features, and
#     arguably don't need to set AT_BASE_PLATFORM, the existing cputable
#     based code always sets it even when we're running bare metal. That
#     means the lack of AT_BASE_PLATFORM is a user-visible artifact of the
#     fact that the kernel is using DT CPU features, which we don't want.
#     
#     So set it in the DT CPU features code also.
#     
#     This results in eg:
#       $ LD_SHOW_AUXV=1 /bin/true | grep "AT_.*PLATFORM"
#       AT_PLATFORM:     power9
#       AT_BASE_PLATFORM:power9
#     
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/mips-linux/bin/mips-linux-gcc --version
# < git log --format=%s --max-count=1 e4b79900222b8cccd4da4a7a89581f0e1b764ed2
# < make -s -j 48 ARCH=mips O=/kisskb/build/powerpc-fixes_mips-defconfig_mips CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/mips-linux/bin/mips-linux-  defconfig
# make -s -j 48 ARCH=mips O=/kisskb/build/powerpc-fixes_mips-defconfig_mips CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/mips-linux/bin/mips-linux-  
/kisskb/src/arch/mips/vdso/Makefile:32: MIPS VDSO requires binutils >= 2.25
/kisskb/src/arch/mips/vdso/Makefile:32: MIPS VDSO requires binutils >= 2.25
/kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl':
/kisskb/src/kernel/printk/printk.c:183:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/rcu/srcutree.c: In function 'init_srcu_struct_fields':
/kisskb/src/kernel/rcu/srcutree.c:146:32: warning: 'levelspread[<U8640>]' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/rcu/srcutree.c:94:6: note: 'levelspread[<U8640>]' was declared here
/kisskb/src/drivers/auxdisplay/img-ascii-lcd.c: In function 'malta_update':
/kisskb/src/drivers/auxdisplay/img-ascii-lcd.c:109:5: warning: 'err' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/auxdisplay/img-ascii-lcd.c: In function 'sead3_update':
/kisskb/src/drivers/auxdisplay/img-ascii-lcd.c:207:5: warning: 'err' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/cgroup/cgroup-v1.c: In function 'cgroup1_mount':
/kisskb/src/kernel/cgroup/cgroup-v1.c:1268:20: warning: 'root' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/tty/serial/8250/8250_core.c: In function 'univ8250_release_irq':
/kisskb/src/drivers/tty/serial/8250/8250_core.c:251:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/tty/serial/8250/8250_core.c:231:19: note: 'i' was declared here
/kisskb/src/arch/mips/vdso/Makefile:32: MIPS VDSO requires binutils >= 2.25
/kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl':
/kisskb/src/kernel/printk/printk.c:183:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized]
FIT description: Linux 4.16.0-rc2-ge4b7990
Created:         Wed Mar 14 20:31:44 2018
 Image 0 (kernel@0)
  Description:  Linux 4.16.0-rc2-ge4b7990
  Created:      Wed Mar 14 20:31:44 2018
  Type:         Kernel Image
  Compression:  gzip compressed
  Data Size:    4324737 Bytes = 4223.38 kB = 4.12 MB
  Architecture: MIPS
  OS:           Linux
  Load Address: 0x80100000
  Entry Point:  0x80850290
  Hash algo:    sha1
  Hash value:   21edc1e0b5ff87e8143d544c2eb41d3b6fcef37e
 Image 1 (fdt@boston)
  Description:  img,boston Device Tree
  Created:      Wed Mar 14 20:31:44 2018
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    3602 Bytes = 3.52 kB = 0.00 MB
  Architecture: MIPS
  Hash algo:    sha1
  Hash value:   dabc84017c5ea1c23fdb5a4b25d185bdf81faa6a
 Image 2 (fdt@ni169445)
  Description:  NI 169445 device tree
  Created:      Wed Mar 14 20:31:44 2018
  Type:         Flat Device Tree
  Compression:  uncompressed
  Data Size:    1871 Bytes = 1.83 kB = 0.00 MB
  Architecture: MIPS
  Hash algo:    sha1
  Hash value:   51b89b31605ee62038c8468c429af091dfc75ec7
 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
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_mips-defconfig_mips
# Build took: 0:01:22.411650