CVS commit: src/sys/arch/xen/xen

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

Module Name:    src
Committed By:   riastradh
Date:           Sat Feb 25 00:34:25 UTC 2023

Modified Files:
        src/sys/arch/xen/xen: xennetback_xenbus.c

Log Message:
xennetback(4): Fix membars in xennetback_rx_copy_process.

- No need for barrier around touching req_cons and rsp_prod_pvt,
  which are private.

- RING_PUSH_RESPONSES_AND_CHECK_NOTIFY already issues xen_wmb, no
  need to add one explicitly.

- After pushing responses, must issue xen_wmb (not xen_rmb) before
  hypervisor_notify_via_evtchn.


To generate a diff of this commit:
cvs rdiff -u -r1.109 -r1.110 src/sys/arch/xen/xen/xennetback_xenbus.c

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