# git rev-parse -q --verify 66763e9d1f6a8eda00da3a32c007b2af61412c10^{commit}
66763e9d1f6a8eda00da3a32c007b2af61412c10
already have revision, skipping fetch
# git checkout -q -f -B kisskb 66763e9d1f6a8eda00da3a32c007b2af61412c10
# git clean -qxdf
# < git log -1
# commit 66763e9d1f6a8eda00da3a32c007b2af61412c10
# 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>
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version
# < git log --format=%s --max-count=1 66763e9d1f6a8eda00da3a32c007b2af61412c10
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pmac32_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  pmac32_defconfig
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pmac32_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  
/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/sound/ppc/awacs.c: In function 'snd_pmac_awacs_init':
/kisskb/src/include/sound/control.h:220:2: warning: 'speaker_vol' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/sound/ppc/awacs.c:886:36: note: 'speaker_vol' was declared here
/kisskb/src/drivers/dma-buf/reservation.c: In function 'reservation_object_add_shared_fence':
/kisskb/src/drivers/dma-buf/reservation.c:225:6: warning: 'k' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/nfsd/nfs4xdr.c: In function 'nfsd4_encode_components_esc':
/kisskb/src/fs/nfsd/nfs4xdr.c:2043:9: warning: 'str' 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/drivers/net/tun.c: In function 'tun_get_user':
/kisskb/src/drivers/net/tun.c:1820:30: warning: 'copylen' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/net/tun.c:1730:46: warning: 'linear' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/net/wireless/broadcom/b43/phy_n.c: In function 'b43_nphy_rf_ctl_override_rev7':
/kisskb/src/drivers/net/wireless/broadcom/b43/phy_n.c:202:21: warning: 'val_addr' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/net/mac80211/mlme.c: In function 'ieee80211_rx_mgmt_beacon':
/kisskb/src/net/mac80211/mlme.c:1350:3: warning: 'pwr_level_cisco' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/net/mac80211/mlme.c:1307:6: note: 'pwr_level_cisco' was declared here
WARNING: modpost: Found 1 section mismatch(es).
To see full details build your kernel with:
'make CONFIG_DEBUG_SECTION_MISMATCH=y'
INFO: Uncompressed kernel (size 0x88a240) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x900000)
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_pmac32_defconfig_powerpc
# Build took: 0:01:12.080786