# git rev-parse -q --verify c30962d2cf8a994840974d63a83da72d8efcc76d^{commit}
c30962d2cf8a994840974d63a83da72d8efcc76d
already have revision, skipping fetch
# git checkout -q -f -B kisskb c30962d2cf8a994840974d63a83da72d8efcc76d
# git clean -qxdf
# < git log -1
# commit c30962d2cf8a994840974d63a83da72d8efcc76d
# Author: Michael Ellerman <mpe@ellerman.id.au>
# Date:   Sat Dec 21 14:16:54 2019 +1100
# 
#     powerpc/mm: Mark get_slice_psize() & slice_addr_is_low() as notrace
#     
#     These slice routines are called from the SLB miss handler, which can
#     lead to warnings from the IRQ code, because we have not reconciled the
#     IRQ state properly:
#     
#       WARNING: CPU: 72 PID: 30150 at arch/powerpc/kernel/irq.c:258 arch_local_irq_restore.part.0+0xcc/0x100
#       Modules linked in:
#       CPU: 72 PID: 30150 Comm: ftracetest Not tainted 5.5.0-rc2-gcc9x-g7e0165b2f1a9 #1
#       NIP:  c00000000001d83c LR: c00000000029ab90 CTR: c00000000026cf90
#       REGS: c0000007eee3b960 TRAP: 0700   Not tainted  (5.5.0-rc2-gcc9x-g7e0165b2f1a9)
#       MSR:  8000000000021033 <SF,ME,IR,DR,RI,LE>  CR: 22242844  XER: 20000000
#       CFAR: c00000000001d780 IRQMASK: 0
#       ...
#       NIP arch_local_irq_restore.part.0+0xcc/0x100
#       LR  trace_graph_entry+0x270/0x340
#       Call Trace:
#         trace_graph_entry+0x254/0x340 (unreliable)
#         function_graph_enter+0xe4/0x1a0
#         prepare_ftrace_return+0xa0/0x130
#         ftrace_graph_caller+0x44/0x94       # (get_slice_psize())
#         slb_allocate_user+0x7c/0x100
#         do_slb_fault+0xf8/0x300
#         instruction_access_slb_common+0x140/0x180
#     
#     Fixes: 48e7b7695745 ("powerpc/64s/hash: Convert SLB miss handlers to C")
#     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 c30962d2cf8a994840974d63a83da72d8efcc76d
# < make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_kilauea_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  40x/kilauea_defconfig
# make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_kilauea_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
/kisskb/src/arch/powerpc/kernel/head_40x.S: Assembler messages:
/kisskb/src/arch/powerpc/kernel/head_40x.S:802: Warning: invalid register expression
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_40x_kilauea_defconfig_powerpc-gcc5
# Build took: 0:00:46.356083