I tried to test the fix to 32-bit poweroc boot hang but found that current git 
does not compile on 32bit poweroc at all for me:

  CC      arch/powerpc/kernel/ptrace.o
In file included from ./include/linux/bitmap.h:9,
                 from ./include/linux/cpumask.h:12,
                 from ./include/linux/rcupdate.h:44,
                 from ./include/linux/rculist.h:11,
                 from ./include/linux/pid.h:5,
                 from ./include/linux/sched.h:14,
                 from arch/powerpc/kernel/ptrace.c:19:
In function ‘memcpy’,
    inlined from ‘user_regset_copyin’ at ./include/linux/regset.h:295:4,
    inlined from ‘vr_set’ at arch/powerpc/kernel/ptrace.c:619:9:
./include/linux/string.h:345:9: error: ‘__builtin_memcpy’ offset [-527, -529] is out 
of the bounds [0, 16] of object ‘vrsave’ with type ‘union <anonymous>’ 
[-Werror=array-bounds]
  return __builtin_memcpy(p, q, size);
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/kernel/ptrace.c: In function ‘vr_set’:
arch/powerpc/kernel/ptrace.c:614:5: note: ‘vrsave’ declared here
   } vrsave;
     ^~~~~~
In file included from ./include/linux/bitmap.h:9,
                 from ./include/linux/cpumask.h:12,
                 from ./include/linux/rcupdate.h:44,
                 from ./include/linux/rculist.h:11,
                 from ./include/linux/pid.h:5,
                 from ./include/linux/sched.h:14,
                 from arch/powerpc/kernel/ptrace.c:19:
In function ‘memcpy’,
    inlined from ‘user_regset_copyout’ at ./include/linux/regset.h:270:4,
    inlined from ‘vr_get’ at arch/powerpc/kernel/ptrace.c:572:9:
./include/linux/string.h:345:9: error: ‘__builtin_memcpy’ offset [-527, -529] is out 
of the bounds [0, 16] of object ‘vrsave’ with type ‘union <anonymous>’ 
[-Werror=array-bounds]
  return __builtin_memcpy(p, q, size);
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/kernel/ptrace.c: In function ‘vr_get’:
arch/powerpc/kernel/ptrace.c:567:5: note: ‘vrsave’ declared here
   } vrsave;
     ^~~~~~
cc1: all warnings being treated as errors
make[1]: *** [scripts/Makefile.build:306: arch/powerpc/kernel/ptrace.o] Error 1
make: *** [Makefile:1052: arch/powerpc/kernel] Error 2

--
Meelis Roos <mr...@linux.ee>

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