On Wed, Apr 20, 2016 at 02:06:33PM -0700, H. Peter Anvin wrote:
> Setting ret to sem doesn't make any sense. Just use "=a" and "a".
Yeah, that's what Michal's patch ontop does.
And to answer my own question: we need the "a" (sem) input for the fast
path.
I guess we can still move "1" (RWSEM_ACTIVE_WRITE_BIAS) before the asm():
long tmp = RWSEM_ACTIVE_WRITE_BIAS;
One thing I'm still not clear on is why we need the output tmp operand:
"=d" (tmp) ?
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
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