lib/libc/mips/string/bzero.S -- problem in 64-bit mode.

[Artem Belevich]

> I just tested this with a simple program - and there is certainly an
> issue here.  If you can send me a patch, I can check that in after
> testing.

Try attached diff.

> The kernel version of bzero() does not seem to have the SZREG==8 case,
> and this bug.

True. It still uses 32-bit sw to zero stuff out. There are number of
routines in the kernel that could take advantage of 64-bit
instructions.

--Artem
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