# git rev-parse -q --verify 9c1a41149230e5e2d48c8948943306b8c0c9f242^{commit}
9c1a41149230e5e2d48c8948943306b8c0c9f242
already have revision, skipping fetch
# git checkout -q -f -B kisskb 9c1a41149230e5e2d48c8948943306b8c0c9f242
# git clean -qxdf
# < git log -1
# commit 9c1a41149230e5e2d48c8948943306b8c0c9f242
# Author: Nicholas Piggin <npiggin@gmail.com>
# Date:   Fri Mar 23 15:53:38 2018 +1000
# 
#     powerpc/64s: Fix i-side SLB miss bad address handler saving nonvolatile GPRs
#     
#     The SLB bad address handler's trap number fixup does not preserve the
#     low bit that indicates nonvolatile GPRs have not been saved. This
#     leads save_nvgprs to skip saving them, and subsequent functions and
#     return from interrupt will think they are saved.
#     
#     This causes kernel branch-to-garbage debugging to not have correct
#     registers, can also cause userspace to have its registers clobbered
#     after a segfault.
#     
#     Fixes: f0f558b131 ("powerpc/mm: Preserve CFAR value on SLB miss caused by access to bogus address")
#     Cc: Paul Mackerras <paulus@ozlabs.org>
#     Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
#     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 9c1a41149230e5e2d48c8948943306b8c0c9f242
# < make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-fixes_44x_akebono_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  44x/akebono_defconfig
# make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-fixes_44x_akebono_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  
/kisskb/src/kernel/rcu/srcutree.c: In function 'init_srcu_struct_fields':
/kisskb/src/kernel/rcu/srcutree.c:146:32: warning: 'levelspread[<U2c80>]' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/rcu/srcutree.c:94:6: note: 'levelspread[<U2c80>]' was declared here
/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/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
WARNING: modpost: Found 1 section mismatch(es).
To see full details build your kernel with:
'make CONFIG_DEBUG_SECTION_MISMATCH=y'
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_44x_akebono_defconfig_powerpc
# Build took: 0:00:54.156561