CVS commit: src/sys/arch/powerpc/oea

["matthew green" <mrg%netbsd.org@localhost>]

Module Name:    src
Committed By:   mrg
Date:           Sun Feb 11 00:01:12 UTC 2018

Modified Files:
        src/sys/arch/powerpc/oea: oea_machdep.c

Log Message:
introduce a inline function to set a value to zero while
hiding this fact from GCC.  this allows the PPC code that
writes to address zero to actually work rather than cause
GCC to emit an explicit "trap" instruction, which in early
boot means hang on my pegasosII.  use this in oae_init()
for both rfid->rfi and also setting the jump-to-zero trap.

found with a lot of debugging, but GCC 6's new warning
-Wnull-dereference found it when i was informed of its
existence.  unfortunately, there are dozens of other
violations in our kernel today so simply enabling that
option for everything is not a good idea, but is a goal.


To generate a diff of this commit:
cvs rdiff -u -r1.73 -r1.74 src/sys/arch/powerpc/oea/oea_machdep.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.