# git rev-parse -q --verify 0f52b3a00c789569d7ed822b5a6b30f59a8d4393^{commit}
0f52b3a00c789569d7ed822b5a6b30f59a8d4393
already have revision, skipping fetch
# git checkout -q -f -B kisskb 0f52b3a00c789569d7ed822b5a6b30f59a8d4393
# git clean -qxdf
# < git log -1
# commit 0f52b3a00c789569d7ed822b5a6b30f59a8d4393
# Author: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
# Date:   Thu Aug 23 10:26:08 2018 +0530
# 
#     powerpc/mce: Fix SLB rebolting during MCE recovery path.
#     
#     The commit e7e81847478 ("powerpc/64s: move machine check SLB flushing
#     to mm/slb.c") introduced a bug in reloading bolted SLB entries. Unused
#     bolted entries are stored with .esid=0 in the slb_shadow area, and
#     that value is now used directly as the RB input to slbmte, which means
#     the RB[52:63] index field is set to 0, which causes SLB entry 0 to be
#     cleared.
#     
#     Fix this by storing the index bits in the unused bolted entries, which
#     directs the slbmte to the right place.
#     
#     The SLB shadow area is also used by the hypervisor, but PAPR is okay
#     with that, from LoPAPR v1.1, 14.11.1.3 SLB Shadow Buffer:
#     
#       Note: SLB is filled sequentially starting at index 0
#       from the shadow buffer ignoring the contents of
#       RB field bits 52-63
#     
#     Fixes: e7e81847478b ("powerpc/64s: move machine check SLB flushing to mm/slb.c")
#     Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
#     Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
#     Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < git log --format=%s --max-count=1 0f52b3a00c789569d7ed822b5a6b30f59a8d4393
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_ppc32_allmodconfig_powerpc-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  ppc32_allmodconfig
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_ppc32_allmodconfig_powerpc-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
/kisskb/src/net/Makefile:24: CC cannot link executables. Skipping bpfilter.
In file included from /kisskb/src/include/linux/bitmap.h:9,
                 from /kisskb/src/include/linux/cpumask.h:12,
                 from /kisskb/src/include/linux/rcupdate.h:44,
                 from /kisskb/src/include/linux/rculist.h:11,
                 from /kisskb/src/include/linux/pid.h:5,
                 from /kisskb/src/include/linux/sched.h:14,
                 from /kisskb/src/arch/powerpc/kernel/ptrace.c:19:
In function 'memcpy',
    inlined from 'user_regset_copyin' at /kisskb/src/include/linux/regset.h:295:4,
    inlined from 'vr_set' at /kisskb/src/arch/powerpc/kernel/ptrace.c:619:9:
/kisskb/src/include/linux/string.h:345:9: warning: '__builtin_memcpy' offset [-527, -529] is out of the bounds [0, 16] of object 'vrsave' with type 'union <anonymous>' [-Warray-bounds]
  return __builtin_memcpy(p, q, size);
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/arch/powerpc/kernel/ptrace.c: In function 'vr_set':
/kisskb/src/arch/powerpc/kernel/ptrace.c:614:5: note: 'vrsave' declared here
   } vrsave;
     ^~~~~~
In file included from /kisskb/src/include/linux/bitmap.h:9,
                 from /kisskb/src/include/linux/cpumask.h:12,
                 from /kisskb/src/include/linux/rcupdate.h:44,
                 from /kisskb/src/include/linux/rculist.h:11,
                 from /kisskb/src/include/linux/pid.h:5,
                 from /kisskb/src/include/linux/sched.h:14,
                 from /kisskb/src/arch/powerpc/kernel/ptrace.c:19:
In function 'memcpy',
    inlined from 'user_regset_copyout' at /kisskb/src/include/linux/regset.h:270:4,
    inlined from 'vr_get' at /kisskb/src/arch/powerpc/kernel/ptrace.c:572:9:
/kisskb/src/include/linux/string.h:345:9: warning: '__builtin_memcpy' offset [-527, -529] is out of the bounds [0, 16] of object 'vrsave' with type 'union <anonymous>' [-Warray-bounds]
  return __builtin_memcpy(p, q, size);
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/arch/powerpc/kernel/ptrace.c: In function 'vr_get':
/kisskb/src/arch/powerpc/kernel/ptrace.c:567:5: note: 'vrsave' declared here
   } vrsave;
     ^~~~~~
In file included from /kisskb/src/arch/powerpc/include/asm/book3s/pgtable.h:8,
                 from /kisskb/src/arch/powerpc/include/asm/pgtable.h:18,
                 from /kisskb/src/include/linux/hugetlb.h:12,
                 from /kisskb/src/arch/powerpc/mm/dump_linuxpagetables.c:19:
/kisskb/src/arch/powerpc/mm/dump_linuxpagetables.c: In function 'populate_markers':
/kisskb/src/arch/powerpc/include/asm/book3s/32/pgtable.h:53:19: error: 'PKMAP_BASE' undeclared (first use in this function); did you mean 'AT_BASE'?
 #define KVIRT_TOP PKMAP_BASE
                   ^~~~~~~~~~
/kisskb/src/arch/powerpc/include/asm/book3s/32/pgtable.h:64:23: note: in expansion of macro 'KVIRT_TOP'
 #define IOREMAP_TOP ((KVIRT_TOP - CONFIG_CONSISTENT_SIZE) & PAGE_MASK)
                       ^~~~~~~~~
/kisskb/src/arch/powerpc/mm/dump_linuxpagetables.c:456:39: note: in expansion of macro 'IOREMAP_TOP'
  address_markers[i++].start_address = IOREMAP_TOP;
                                       ^~~~~~~~~~~
/kisskb/src/arch/powerpc/include/asm/book3s/32/pgtable.h:53:19: note: each undeclared identifier is reported only once for each function it appears in
 #define KVIRT_TOP PKMAP_BASE
                   ^~~~~~~~~~
/kisskb/src/arch/powerpc/include/asm/book3s/32/pgtable.h:64:23: note: in expansion of macro 'KVIRT_TOP'
 #define IOREMAP_TOP ((KVIRT_TOP - CONFIG_CONSISTENT_SIZE) & PAGE_MASK)
                       ^~~~~~~~~
/kisskb/src/arch/powerpc/mm/dump_linuxpagetables.c:456:39: note: in expansion of macro 'IOREMAP_TOP'
  address_markers[i++].start_address = IOREMAP_TOP;
                                       ^~~~~~~~~~~
/kisskb/src/arch/powerpc/mm/dump_linuxpagetables.c:464:39: error: implicit declaration of function 'PKMAP_ADDR'; did you mean 'PCI_IO_ADDR'? [-Werror=implicit-function-declaration]
  address_markers[i++].start_address = PKMAP_ADDR(LAST_PKMAP);
                                       ^~~~~~~~~~
                                       PCI_IO_ADDR
/kisskb/src/arch/powerpc/mm/dump_linuxpagetables.c:464:50: error: 'LAST_PKMAP' undeclared (first use in this function); did you mean 'LIST_HEAD'?
  address_markers[i++].start_address = PKMAP_ADDR(LAST_PKMAP);
                                                  ^~~~~~~~~~
                                                  LIST_HEAD
cc1: some warnings being treated as errors
/kisskb/src/scripts/Makefile.build:317: recipe for target 'arch/powerpc/mm/dump_linuxpagetables.o' failed
make[2]: *** [arch/powerpc/mm/dump_linuxpagetables.o] Error 1
make[2]: *** Waiting for unfinished jobs....
/kisskb/src/Makefile:1034: recipe for target 'arch/powerpc/mm' failed
make[1]: *** [arch/powerpc/mm] Error 2
make[1]: *** Waiting for unfinished jobs....
/kisskb/src/arch/powerpc/kernel/head_32.S: Assembler messages:
/kisskb/src/arch/powerpc/kernel/head_32.S:990: Warning: invalid register expression
/kisskb/src/arch/powerpc/platforms/52xx/lite5200_sleep.S: Assembler messages:
/kisskb/src/arch/powerpc/platforms/52xx/lite5200_sleep.S:184: Warning: invalid register expression
In file included from /kisskb/src/include/linux/bitmap.h:9,
                 from /kisskb/src/include/linux/nodemask.h:95,
                 from /kisskb/src/include/linux/mmzone.h:17,
                 from /kisskb/src/include/linux/gfp.h:6,
                 from /kisskb/src/include/linux/umh.h:4,
                 from /kisskb/src/include/linux/kmod.h:22,
                 from /kisskb/src/include/linux/module.h:13,
                 from /kisskb/src/kernel/debug/kdb/kdb_io.c:12:
In function 'strncpy',
    inlined from 'kdb_getstr' at /kisskb/src/kernel/debug/kdb/kdb_io.c:446:3:
/kisskb/src/include/linux/string.h:246:9: warning: '__builtin_strncpy' specified bound 256 equals destination size [-Wstringop-truncation]
  return __builtin_strncpy(p, q, size);
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /kisskb/src/include/linux/bitmap.h:9,
                 from /kisskb/src/include/linux/cpumask.h:12,
                 from /kisskb/src/include/linux/rcupdate.h:44,
                 from /kisskb/src/include/linux/rculist.h:11,
                 from /kisskb/src/include/linux/pid.h:5,
                 from /kisskb/src/include/linux/sched.h:14,
                 from /kisskb/src/kernel/debug/kdb/kdb_support.c:15:
In function 'strncpy',
    inlined from 'kallsyms_symbol_next' at /kisskb/src/kernel/debug/kdb/kdb_support.c:239:4:
/kisskb/src/include/linux/string.h:246:9: warning: '__builtin_strncpy' specified bound depends on the length of the source argument [-Wstringop-overflow=]
  return __builtin_strncpy(p, q, size);
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/kisskb/src/kernel/debug/kdb/kdb_support.c: In function 'kallsyms_symbol_next':
/kisskb/src/include/linux/string.h:267:10: note: length computed here
   return __builtin_strlen(p);
          ^~~~~~~~~~~~~~~~~~~
In file included from /kisskb/src/kernel/debug/kdb/kdb_main.c:16:
In function 'strncpy',
    inlined from 'handle_ctrl_cmd' at /kisskb/src/kernel/debug/kdb/kdb_main.c:1106:3,
    inlined from 'kdb_local.isra.0' at /kisskb/src/kernel/debug/kdb/kdb_main.c:1323:10:
/kisskb/src/include/linux/string.h:246:9: warning: '__builtin_strncpy' specified bound 200 equals destination size [-Wstringop-truncation]
  return __builtin_strncpy(p, q, size);
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In function 'strncpy',
    inlined from 'handle_ctrl_cmd' at /kisskb/src/kernel/debug/kdb/kdb_main.c:1111:3,
    inlined from 'kdb_local.isra.0' at /kisskb/src/kernel/debug/kdb/kdb_main.c:1323:10:
/kisskb/src/include/linux/string.h:246:9: warning: '__builtin_strncpy' specified bound 200 equals destination size [-Wstringop-truncation]
  return __builtin_strncpy(p, q, size);
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /kisskb/src/include/linux/bitmap.h:9,
                 from /kisskb/src/include/linux/nodemask.h:95,
                 from /kisskb/src/include/linux/mmzone.h:17,
                 from /kisskb/src/include/linux/gfp.h:6,
                 from /kisskb/src/include/linux/umh.h:4,
                 from /kisskb/src/include/linux/kmod.h:22,
                 from /kisskb/src/include/linux/module.h:13,
                 from /kisskb/src/kernel/trace/trace_events_hist.c:17:
In function 'strncpy',
    inlined from 'hist_err_event' at /kisskb/src/kernel/trace/trace_events_hist.c:396:3:
/kisskb/src/include/linux/string.h:246:9: warning: '__builtin_strncpy' specified bound 256 equals destination size [-Wstringop-truncation]
  return __builtin_strncpy(p, q, size);
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Makefile:146: recipe for target 'sub-make' failed
make: *** [sub-make] Error 2
Command 'make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_ppc32_allmodconfig_powerpc-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/powerpc-next_ppc32_allmodconfig_powerpc-gcc8
# Build took: 0:00:31.364294