free(9) sizes.

From miod@

Replace some malloc(n*size,...) calls with mallocarray().

ok tedu@ deraadt@

add a size argument to free. will be used soon, but for now default to 0.
after discussions with beck deraadt kettenis.

Preallocate sgmap extent regions for tsp, cia and mcpcia dma maps, which fall
back to sgmap if the direct mapping fails.

ok miod@

Use extent_alloc_with_descr(9) and add a mutex to protect the extent.
This should make bus_dmamap_load(9) and bus_dmamap_unload(9) "mpsafe".

As a bonus this gets rid of a potential memory allocation

Use extent_alloc_with_descr(9) and add a mutex to protect the extent.
This should make bus_dmamap_load(9) and bus_dmamap_unload(9) "mpsafe".

As a bonus this gets rid of a potential memory allocation in the IO path.

ok miod@

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First pass at removing clauses 3 and 4 from NetBSD licenses.

Not sure what's more surprising: how long it took for NetBSD to
catch up to the rest of the BSDs (including UCB), or the amount of
code t

First pass at removing clauses 3 and 4 from NetBSD licenses.

Not sure what's more surprising: how long it took for NetBSD to
catch up to the rest of the BSDs (including UCB), or the amount of
code that NetBSD has claimed for itself without attributing to the
actual authors.

OK deraadt@

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Use PAGE_SIZE rather than NBPG.

From NetBSD

ok martin@ miod@

clean up after Theo's "support mbuf handling in alpha sgmap dma maps" commit.

ok martin@

factorize SGMAP-mapped DMA map creation and destroy code

ok miod@, additional testing jsg@

from NetBSD

typos from Jared Yanovich;

No \n at the end of a panic() message... I thought all occurences had been
squashed already.

Since the sgmap is used in interrupts protect the extent with splvm.
nate@ ok.

Should fix a bunch of random memory corruption problems on many machines.
How we could live so long without it is beyon

Since the sgmap is used in interrupts protect the extent with splvm.
nate@ ok.

Should fix a bunch of random memory corruption problems on many machines.
How we could live so long without it is beyond me. Now my traktor is happy.

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Replace inclusion of <vm/foo.h> with the correct <uvm/bar.h> when necessary.
(Look ma, I might have broken the tree)

Get rid of the wrapper macros around extent_alloc*1
Pass the right amount of arguments and rename them back to their right names.

Move files from common to dev to be more like other archs
(and so that tab completion on "compile" works as on other archs. :))