On Tue, 25 May 2004 09:19:52 -0700 (PDT)
Linus Torvalds [off-list ref] wrote:

On Tue, 25 May 2004, Keith M Wesolowski wrote:

quoted

Some sparc32 CPUs are also vulnerable to this race; in fact the
supersparc manual describes it specifically and even outlines the
compare-exchange loop using our rotten swap instruction.  In our case,
the race is with a hardware walker.

Yes, but the sparc32 page tables are not the same as the linux kernel page 
tables, so in your case it's a different path and a different page table. 
Only the shared case really matters (ie things that do hw/microcode walk 
of a page table _tree_ not a hash).

Not true on 32-bit Sparc sun4m systems, it's exactly like i386 except
the hardware is stupid and we only have an atomic swap instruction.
:-)
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