tree b4366befad4873fcbcbcfc5081dc654da10e08b1
parent 2f415d1da136c1c532cd405834051adbd5ba2702
author David Awogbemila <awogbemila@google.com> 1623260993 -0700
committer COS Cherry Picker <cloud-image-release@prod.google.com> 1623272442 -0700

gve: Upgrade memory barrier in poll routine

We need a hard memory barrier in the poll routine for
both tx and rx, so upgrade the barrier in the poll routine
and remove the rx specific barrier since it is now the same.

Upstream Commit: https://github.com/GoogleCloudPlatform/compute-virtual-ethernet-linux/commit/e5d501eda8d644b1d4e59da381ccc9e895106061

We have submitted
https://cos-review.googlesource.com/c/third_party/kernel/+/17430
earlier. However, the current patch is more generic as it works for
uniprocessor machines too.

SOURCE=GVE(e5d501eda8d644b1d4e59da381ccc9e895106061)
BUG=b/186581049
TEST=presubmit and customer tested the image.
RELEASE_NOTE=Fixed a network regression while using gve network
interface.

cos-patch: bug
Signed-off-by: David Awogbemila <awogbemila@google.com>
Change-Id: I9dbb5196be413f97c580eaab40ee00b55fc4484b
Reviewed-on: https://cos-review.googlesource.com/c/third_party/kernel/+/17712
Reviewed-by: Roy Yang <royyang@google.com>
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Main-Branch-Verified: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>