# git rev-parse -q --verify 1ccd25030612c37a86f574e71c4f5b0ac246c183^{commit}
1ccd25030612c37a86f574e71c4f5b0ac246c183
already have revision, skipping fetch
# git checkout -q -f -B kisskb 1ccd25030612c37a86f574e71c4f5b0ac246c183
# git clean -qxdf
# < git log -1
# commit 1ccd25030612c37a86f574e71c4f5b0ac246c183
# Author: Nicholas Piggin <npiggin@gmail.com>
# Date:   Wed Aug 15 00:10:22 2018 +1000
# 
#     powerpc/64s/hash: convert SLB miss handlers to C
#     
#     This patch moves SLB miss handlers completely to C, using the standard
#     exception handler macros to set up the stack and branch to C.
#     
#     This can be done because the segment containing the kernel stack is
#     always bolted, so accessing it with relocation on will not cause an
#     SLB exception.
#     
#     Arbitrary kernel memory may not be accessed when handling kernel space
#     SLB misses, so care should be taken there. However user SLB misses can
#     access any kernel memory, which can be used to move some fields out of
#     the paca (in later patches).
#     
#     User SLB misses could quite easily reconcile IRQs and set up a first
#     class kernel environment and exit via ret_from_except, however that
#     doesn't seem to be necessary at the moment, so we only do that if a
#     bad fault is encountered.
#     
#     [ Credit to Aneesh for bug fixes, error checks, and improvements to bad
#       address handling, etc ]
#     
#     Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
#     
#     Since RFC:
#     - Added MSR[RI] handling
#     - Fixed up a register loss bug exposed by irq tracing (Aneesh)
#     - Reject misses outside the defined kernel regions (Aneesh)
#     - Added several more sanity checks and error handling (Aneesh), we may
#       look at consolidating these tests and tightenig up the code but for
#       a first pass we decided it's better to check carefully.
#     
#     Since v1:
#     - Fixed SLB cache corruption (Aneesh)
#     - Fixed untidy SLBE allocation "leak" in get_vsid error case
#     - Now survives some stress testing on real hardware
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version
# < git log --format=%s --max-count=1 1ccd25030612c37a86f574e71c4f5b0ac246c183
# < make -s -j 8 ARCH=powerpc O=/kisskb/build/npiggin_ppc6xx_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  ppc6xx_defconfig
# make -s -j 8 ARCH=powerpc O=/kisskb/build/npiggin_ppc6xx_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  
/kisskb/src/arch/powerpc/kernel/trace/ftrace.c: In function 'prepare_ftrace_return':
/kisskb/src/arch/powerpc/kernel/trace/ftrace.c:746:3: error: 'local_paca' undeclared (first use in this function)
/kisskb/src/arch/powerpc/kernel/trace/ftrace.c:746:3: note: each undeclared identifier is reported only once for each function it appears in
/kisskb/src/arch/powerpc/kernel/trace/ftrace.c:746:32: error: 'PACA_IRQ_HARD_DIS' undeclared (first use in this function)
/kisskb/src/arch/powerpc/kernel/trace/ftrace.c:747:10: error: implicit declaration of function 'irq_soft_mask_set' [-Werror=implicit-function-declaration]
/kisskb/src/arch/powerpc/kernel/trace/ftrace.c:747:28: error: 'IRQS_ENABLED' undeclared (first use in this function)
cc1: all warnings being treated as errors
make[3]: *** [/kisskb/src/scripts/Makefile.build:307: arch/powerpc/kernel/trace/ftrace.o] Error 1
make[2]: *** [/kisskb/src/scripts/Makefile.build:548: arch/powerpc/kernel/trace] Error 2
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [/kisskb/src/Makefile:1053: arch/powerpc/kernel] Error 2
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:146: sub-make] Error 2
Command 'make -s -j 8 ARCH=powerpc O=/kisskb/build/npiggin_ppc6xx_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/npiggin_ppc6xx_defconfig_powerpc
# Build took: 0:00:11.184174