CVS commit: src/sys/dev/hyperv

["Taylor R Campbell" <riastradh%netbsd.org@localhost>]

Module Name:    src
Committed By:   riastradh
Date:           Sat Sep  6 02:56:07 UTC 2025

Modified Files:
        src/sys/dev/hyperv: vmbus.c

Log Message:
hyperv(4): Use paravirt_membar_sync(9) where needed.

Annotate each remaining membar_sync with the bus_dmamap_sync that I
think it really ought to be.  Sprinkle some more annotations of where
bus_dmamap_sync ought to go.  (Although these likely don't matter --
except as __insn_barrier equivalents -- for hyperv on x86, and these
buffers are not likely to ever bounce, the syncs may be needed on Arm
for the underlying r-before-r/w and r/w-before-w ordering if nothing
else.)

PR kern/59618: occasional virtio block device lock ups/hangs

(hyperv(4) is not virtio(4) but the same fundamental issue arises.)


To generate a diff of this commit:
cvs rdiff -u -r1.19 -r1.20 src/sys/dev/hyperv/vmbus.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.