On 29 Sep 2006 10:57:45 +0200
Andi Kleen <[email protected]> wrote:
> > Some architectures (powerpc) implement WARN using the same mechanism;
> > if the illegal instruction was the result of a WARN, then report_bug()
> > returns 1; otherwise it returns 0.
>
> In theory we could do that on x86 too (and skipping the instruction),
> the only problem
> is that the only guaranteed to fault opcode is ud2 :/. Ok maybe we could
> reserve some int XXX vector.
>
> % gid WARN_ON | grep -v arch | wc -l
> 299
powerpc sets a bit in the __LINE__ number to indicate that it was a
WARN_ON. That'll work on all architectures.
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