Re: [PATCH v2 2/4] MIPS: VDSO: Add implementation of clock_gettime() fallback

From: James Hogan
Date: Thu Jul 06 2017 - 10:09:19 EST

On Thu, Jul 06, 2017 at 02:12:37PM +0100, Maciej W. Rozycki wrote:
> On Thu, 6 Jul 2017, James Hogan wrote:
> > > (and would have to forcibly use the 32-bit encoding in the microMIPS
> > > case)?
> >
> > I don't believe there is a 16-bit SYSCALL encoding in microMIPS, at
> > least I can't see one in the 5.04 manual.
> I referred to the preceding instruction, presumably LI, that does have a
> 16-bit variant in the microMIPS instruction set.

Ah yes, I see what you mean.

Hopefully microMIPS support is new enough for that not to matter.

It appears that the restart behaviour was improved in v2.6.36 in commit
8f5a00eb422e ("MIPS: Sanitize restart logics"), whereas first mentions
of micromips are in v3.9, in commit f8fa4811dbb2 ("MIPS: Add support for
the M14KEc core.").


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