eth: mpnic: use WRITE_ONCE() for BDQ head and tail updates

Convert writes to BDQ ring head and tail in the NAPI path to
WRITE_ONCE(), so that a buffer NAPI depletion check task later in the
series can READ_ONCE() those fields from a workqueue outside of NAPI.
The remaining writers in mpnic_enable_bdq() and mpnic_clean_bdq() run
with NAPI disabled and the instance lock, so don't bother converting
them. The NAPI depletion check later in the series will run under the
instance lock.

Signed-off-by: Daniel Zahka <daniel.zahka@gmail.com>
Reviewed-by: Harshitha Ramamurthy <hramamurthy@google.com>
Link: https://patch.msgid.link/20261001-linux-mpnic-v1-1-6422ee74233a@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

0 files changed, 0 insertions, 0 deletions