generally tidy up the TX power programming code.
Enforce that the TX power offset for Merlin is -5 dBm, rather than
any other value programmable in the EEPROM. This requires some
further code to be ported over from ath9k, so until that is done
and tested, fail to attach NICs whose TX power offset isn't -5
dBm.
This improves both legacy and HT transmission on my merlin board.
It allows for stable MCS TX up to MCS15.
Specifics:
* Refactor out a bunch of the TX power calibration code -
setting/obtaining the power detector / gain boundaries,
programming the PDADC
* Take the -5 dBm TX power offset into account on Merlin -
"0" in the per-rate TX power register means -5 dBm, not
0 dBm
* When doing OLC
* Enforce min (0) and max (AR5416_MAX_RATE_POWER) when fiddling
with the TX power, to avoid the TX power values from wrapping
when low.
* Implement the 1 dBm cck power offset when doing OLC
* Implement temperature compensation for 2.4ghz mode when doing OLC
* Implement an AR9280 specific TX power calibration routine which
includes the OLC twiddles, leaving the earlier chipset path
(AR5416, AR9160) alone
Whilst here, use these refactored routines for the AR9285 TX power
calibration/programming code and enforce correct overflow/underflow
handling when fiddling with TX power values.
Obtained from: linux ath9k
Preserving $? may cause problems particularly if set -e is in effect.
It may be useful to preserve the old value of $? in the dot script but this
must not be implemented in such a way that it would break this test.
from multiple threads while holding a shared lock during a lookup operation.
This could result in incorrect ENOENT failures which could then be
permanently stored in the name cache.
Specifically, the dirhash code optimizes the case that a single thread is
walking a directory sequentially opening (or stat'ing) each file. It uses
state in the dirhash structure to determine if a given lookup is using the
optimization. If the optimization fails, it disables it and restarts the
lookup. The problem arises when two threads both attempt the optimization
and fail. The first thread will restart the loop, but the second thread
will incorrectly think that it did not try the optimization and will only
examine a subset of the directory entires in its hash chain. As a result,
it may fail to find its directory entry and incorrectly fail with ENOENT.
To make this safe for use with shared locks, simplify the state stored in
the dirhash and move some of the state (the part that determines if the
current thread is trying the optimization) into a local variable. One
result is that we will now try the optimization more often. We still
update the value under the shared lock, but it is a single atomic store
similar to i_diroff that is stored in UFS directory i-nodes for the
non-dirhash lookup.
Reviewed by: kib
MFC after: 1 week
These options are supported in this shape in all newer GCC versions.
PR: gnu/155308
Obtained from: gcc 4.3 (rev. 118090, 118973, 120846; GPLv2)
MFC after: 2 weeks
- Load support for %T for pritning time.
- Add support for %N for printing number in human readable form.
- Add support for %S for printing sockaddr structure (currently only AF_INET
family is supported, as this is all we need in HAST).
- Disable gcc compile-time format checking as this will no longer work.
MFC after: 2 weeks
Following the convention of NO_WERROR and NO_WCAST_ALIGN add NO_WFORMAT,
which, when defined in Makefile, turns off compile-time format checking
(by adding -Wno-format), but still allows to use high WARNS level.
MFC after: 2 weeks
- HOLE - it simply turns all-zero blocks into few bytes header;
it is extremely fast, so it is turned on by default;
it is mostly intended to speed up initial synchronization
where we expect many zeros;
- LZF - very fast algorithm by Marc Alexander Lehmann, which shows
very decent compression ratio and has BSD license.
MFC after: 2 weeks
possible option and script path in the place of argv[0] supplied to
execve(2). It is possible and valid for the substitution to be shorter
then the argv[0].
Avoid signed underflow in this case.
Submitted by: Devon H. O'Dell <devon.odell gmail com>
PR: kern/155321
MFC after: 1 week
- If precision is 0, don't print period followed by no digits.
- If precision is 0 stop printing units as soon as possible
(eg. if we have three years and five days and precision is 0
print only 3y5d).
- If precision is not 0, print all units (eg. 3y0d0h0m0s.00).
MFC after: 2 weeks
values for resolved symbols relative to relocbase instead of sections
so detect this case and handle as appropriate, which allows using
kernel modules linked with affected versions of binutils. Actually I
think this is a bug in binutils but given that apparently nobody
complained for nearly six years and powerpc has basically the same
workaround I decided to put it in for the sparc64 kernel, too.
- Fix R_SPARC_HIX22 relocations. Apparently these are hardly ever used.
the ataahci(4) and atamarvell(4) drivers share it between the host and
the controller.
- Spell some zeros as BUS_DMA_WAITOK when used as bus_dmamem_alloc() flags.
MFC after: 2 weeks
coherent.
- Add some missing bus_dmamap_sync() calls. This includes putting such
calls before calling reply handlers instead of calling bus_dmamap_sync()
for the request queue from individual reply handlers as these handlers
generally read back updates by the controller.
Tested on amd64 and sparc64.
MFC after: 2 weeks
