# git rev-parse -q --verify 210453542946c37317478591cc9ca4a53c062aeb^{commit}
210453542946c37317478591cc9ca4a53c062aeb
already have revision, skipping fetch
# git checkout -q -f -B kisskb 210453542946c37317478591cc9ca4a53c062aeb
# git clean -qxdf
# < git log -1
# commit 210453542946c37317478591cc9ca4a53c062aeb
# Author: Alexey Kardashevskiy <aik@ozlabs.ru>
# Date:   Fri Jun 1 18:06:16 2018 +1000
# 
#     powerpc/powernv/ioda2: Reduce upper limit for DMA window size
#     
#     We use PHB in mode1 which uses bit 59 to select a correct DMA window.
#     However there is mode2 which uses bits 59:55 and allows up to 32 DMA
#     windows per a PE.
#     
#     Even though documentation does not clearly specify that, it seems that
#     the actual hardware does not support bits 59:55 even in mode1, in other
#     words we can create a window as big as 1<<58 but DMA simply won't work.
#     
#     This reduces the upper limit from 59 to 55 bits to let the userspace know
#     about the hardware limits.
#     
#     Fixes: 7aafac11e3 "powerpc/powernv/ioda2: Gracefully fail if too many TCE levels requested"
#     Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-gcc --version
# < git log --format=%s --max-count=1 210453542946c37317478591cc9ca4a53c062aeb
# < make -s -j 120 ARCH=mips O=/kisskb/build/powerpc-next_mips-defconfig_mipsel CROSS_COMPILE=/opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-  defconfig
# make -s -j 120 ARCH=mips O=/kisskb/build/powerpc-next_mips-defconfig_mipsel CROSS_COMPILE=/opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-  
/kisskb/src/arch/mips/kernel/signal.c: In function 'handle_signal':
/kisskb/src/arch/mips/kernel/signal.c:804:22: error: passing argument 1 of 'rseq_signal_deliver' from incompatible pointer type [-Werror=incompatible-pointer-types]
  rseq_signal_deliver(regs);
                      ^
In file included from /kisskb/src/include/linux/context_tracking.h:5:0,
                 from /kisskb/src/arch/mips/kernel/signal.c:12:
/kisskb/src/include/linux/sched.h:1811:20: note: expected 'struct ksignal *' but argument is of type 'struct pt_regs *'
 static inline void rseq_signal_deliver(struct ksignal *ksig,
                    ^
/kisskb/src/arch/mips/kernel/signal.c:804:2: error: too few arguments to function 'rseq_signal_deliver'
  rseq_signal_deliver(regs);
  ^
In file included from /kisskb/src/include/linux/context_tracking.h:5:0,
                 from /kisskb/src/arch/mips/kernel/signal.c:12:
/kisskb/src/include/linux/sched.h:1811:20: note: declared here
 static inline void rseq_signal_deliver(struct ksignal *ksig,
                    ^
/kisskb/src/arch/mips/kernel/signal.c: In function 'do_notify_resume':
/kisskb/src/arch/mips/kernel/signal.c:873:29: error: passing argument 1 of 'rseq_handle_notify_resume' from incompatible pointer type [-Werror=incompatible-pointer-types]
   rseq_handle_notify_resume(regs);
                             ^
In file included from /kisskb/src/include/linux/context_tracking.h:5:0,
                 from /kisskb/src/arch/mips/kernel/signal.c:12:
/kisskb/src/include/linux/sched.h:1804:20: note: expected 'struct ksignal *' but argument is of type 'struct pt_regs *'
 static inline void rseq_handle_notify_resume(struct ksignal *ksig,
                    ^
/kisskb/src/arch/mips/kernel/signal.c:873:3: error: too few arguments to function 'rseq_handle_notify_resume'
   rseq_handle_notify_resume(regs);
   ^
In file included from /kisskb/src/include/linux/context_tracking.h:5:0,
                 from /kisskb/src/arch/mips/kernel/signal.c:12:
/kisskb/src/include/linux/sched.h:1804:20: note: declared here
 static inline void rseq_handle_notify_resume(struct ksignal *ksig,
                    ^
cc1: all warnings being treated as errors
/kisskb/src/scripts/Makefile.build:317: recipe for target 'arch/mips/kernel/signal.o' failed
make[3]: *** [arch/mips/kernel/signal.o] Error 1
make[3]: *** Waiting for unfinished jobs....
/kisskb/src/scripts/Makefile.build:558: recipe for target 'arch/mips/kernel' failed
make[2]: *** [arch/mips/kernel] Error 2
make[2]: *** Waiting for unfinished jobs....
/kisskb/src/Makefile:1034: recipe for target 'arch/mips' failed
make[1]: *** [arch/mips] Error 2
make[1]: *** Waiting for unfinished jobs....
Makefile:146: recipe for target 'sub-make' failed
make: *** [sub-make] Error 2
Command 'make -s -j 120 ARCH=mips O=/kisskb/build/powerpc-next_mips-defconfig_mipsel CROSS_COMPILE=/opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/powerpc-next_mips-defconfig_mipsel
# Build took: 0:00:28.849332