on arm32, we can do one of 4 shifts
by a constant:
reg<<(0..31)
reg>>(1..32)
((u32int)reg)>>(1..32)
reg ROT (0..31)
There's no way to encode a 0 bit right
shift, so when encoding reg>>0, flip
it to the equivalent nop reg<<0, which
can be encoded.
This prevents an incorrect warning for a comparison such as `0 < x`,
where x is an unsigned type. Previously, this would get normalized as
`x >= 0` rather than `x > 0` when checking the comparison.
With ntlm auth, we were trying to set 0 bytes of
the auth struct to its size. The args were clearly
swapped. Fix it.
While we're here, remove some dead code.
When running a mail queue, it's useful to run it with limited
parallelism. This helps mailing lists process messages in a
reasonable time.
At the same time, we can remove the load balancing from runq,
since the kinds of systems that this matters on no longer
exist, and running multiple queues at once can be better
done through xargs.
Querying battery (or temperature) using ACPI takes quite some
resources, which makes the battery discharge faster. It doesn't make
much sense to have it queried as often either. So, when using ACPI:
1) set battery query period to 10s minimum
2) set temperature query period to 5s minimum
When _startbuf is invoked, it would crash on the second invocation
if creating a mux segment failed. This is because the first attempt
would assign the return value -1 to the global mux variable, and
the second attempt would notice that the global mux was not nil,
and would attempt to use it.
This change only assigns to the global variable if the allocation
of the segment was a success.
While we're here, we should also check the return of the rfork call.
When invoking with dd with an invalid size suffix, we
silently accept the suffix. This can lead to confusion,
because lines like:
dd -bs 1K
dd -bs 1m
will silently copy in 1-byte increments. This has caught
people by surprise. While we're at it, megabytes are
convenient, so let's have them too.
Passwd used to produce a very confusing error
about DES not being enabled whenever the password
was mistyped. This happened because we attempted
to guess what authentication method to use, and
preseneted the error from the wrong one on failure.
This puts the legacy mode behind a flag, so that
we don't even try the old method unless it's
explicitly requested.
This adds the new function pointer PCArch.clockinit(),
which is a timer dependent initialization routine.
It also takes over the job of guesscpuhz(). This way, the
architecture ident code can switch between different
timers (i8253, HPET and XEN timer).
