# git rev-parse -q --verify d4bf905307a1c90a27714ff7a9fd29b0a2ceed98^{commit}
d4bf905307a1c90a27714ff7a9fd29b0a2ceed98
already have revision, skipping fetch
# git checkout -q -f -B kisskb d4bf905307a1c90a27714ff7a9fd29b0a2ceed98
# git clean -qxdf
# < git log -1
# commit d4bf905307a1c90a27714ff7a9fd29b0a2ceed98
# Author: Christophe Leroy <christophe.leroy@c-s.fr>
# Date:   Fri Feb 7 17:20:57 2020 +0000
# 
#     powerpc: Fix CONFIG_TRACE_IRQFLAGS with CONFIG_VMAP_STACK
#     
#     When CONFIG_PROVE_LOCKING is selected together with (now default)
#     CONFIG_VMAP_STACK, kernel enter deadlock during boot.
#     
#     At the point of checking whether interrupts are enabled or not, the
#     value of MSR saved on stack is read using the physical address of the
#     stack. But at this point, when using VMAP stack the DATA MMU
#     translation has already been re-enabled, leading to deadlock.
#     
#     Don't use the physical address of the stack when
#     CONFIG_VMAP_STACK is set.
#     
#     Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
#     Reported-by: Guenter Roeck <linux@roeck-us.net>
#     Fixes: 028474876f47 ("powerpc/32: prepare for CONFIG_VMAP_STACK")
#     Tested-by: Guenter Roeck <linux@roeck-us.net>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/daeacdc0dec0416d1c587cc9f9e7191ad3068dc0.1581095957.git.christophe.leroy@c-s.fr
# < /opt/cross/kisskb/br-microblaze-full-2016.08-613-ge98b4dd/bin/microblazeel-linux-gcc --version
# < /opt/cross/kisskb/br-microblaze-full-2016.08-613-ge98b4dd/bin/microblazeel-linux-ld --version
# < git log --format=%s --max-count=1 d4bf905307a1c90a27714ff7a9fd29b0a2ceed98
# < make -s -j 48 ARCH=microblaze O=/kisskb/build/powerpc-fixes_mmu_defconfig_microblaze CROSS_COMPILE=/opt/cross/kisskb/br-microblaze-full-2016.08-613-ge98b4dd/bin/microblazeel-linux-  mmu_defconfig
# make -s -j 48 ARCH=microblaze O=/kisskb/build/powerpc-fixes_mmu_defconfig_microblaze CROSS_COMPILE=/opt/cross/kisskb/br-microblaze-full-2016.08-613-ge98b4dd/bin/microblazeel-linux-  
/kisskb/src/kernel/debug/kdb/kdb_main.c: In function 'kdb_rd':
/kisskb/src/kernel/debug/kdb/kdb_main.c:1857:11: error: 'dbg_reg_def' undeclared (first use in this function)
   rsize = dbg_reg_def[i].size * 2;
           ^
/kisskb/src/kernel/debug/kdb/kdb_main.c:1857:11: note: each undeclared identifier is reported only once for each function it appears in
/kisskb/src/kernel/debug/kdb/kdb_main.c:1868:12: error: implicit declaration of function 'dbg_get_reg' [-Werror=implicit-function-declaration]
    rname = dbg_get_reg(i, &reg8, kdb_current_regs);
            ^
/kisskb/src/kernel/debug/kdb/kdb_main.c:1868:10: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
    rname = dbg_get_reg(i, &reg8, kdb_current_regs);
          ^
/kisskb/src/kernel/debug/kdb/kdb_main.c:1874:10: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
    rname = dbg_get_reg(i, &reg16, kdb_current_regs);
          ^
/kisskb/src/kernel/debug/kdb/kdb_main.c:1880:10: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
    rname = dbg_get_reg(i, &reg32, kdb_current_regs);
          ^
/kisskb/src/kernel/debug/kdb/kdb_main.c:1886:10: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
    rname = dbg_get_reg(i, &reg64, kdb_current_regs);
          ^
cc1: some warnings being treated as errors
make[4]: *** [/kisskb/src/scripts/Makefile.build:265: kernel/debug/kdb/kdb_main.o] Error 1
make[4]: *** Waiting for unfinished jobs....
make[3]: *** [/kisskb/src/scripts/Makefile.build:503: kernel/debug/kdb] Error 2
make[2]: *** [/kisskb/src/scripts/Makefile.build:503: kernel/debug] Error 2
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [/kisskb/src/Makefile:1681: kernel] Error 2
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:179: sub-make] Error 2
Command 'make -s -j 48 ARCH=microblaze O=/kisskb/build/powerpc-fixes_mmu_defconfig_microblaze CROSS_COMPILE=/opt/cross/kisskb/br-microblaze-full-2016.08-613-ge98b4dd/bin/microblazeel-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/powerpc-fixes_mmu_defconfig_microblaze
# Build took: 0:00:40.450456