Received-SPF: pass (google.com: domain of linux-kernel+bounces-154452-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:40f1:3f00::1 as permitted sender) client-ip=2604:1380:40f1:3f00::1;
From: Gavin Shan <gshan@redhat.com>
To: virtualization@lists.linux.dev
Cc: linux-kernel@vger.kernel.org,
	mst@redhat.com,
	jasowang@redhat.com,
	shan.gavin@gmail.com
Subject: [PATCH 0/4] vhost: Cleanup
Date: Tue, 23 Apr 2024 13:24:03 +1000
Message-ID: <20240423032407.262329-1-gshan@redhat.com>
Precedence: bulk
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

This is suggested by Michael S. Tsirkin according to [1] and the goal
is to apply smp_rmb() inside vhost_get_avail_idx() if needed. With it,
the caller of the function needn't to worry about memory barriers. Since
we're here, other cleanups are also applied.

[1] https://lore.kernel.org/virtualization/20240327075940-mutt-send-email-mst@kernel.org/

PATCH[1] drops the local variable @last_avail_idx since it's equivalent
         to vq->last_avail_idx
PATCH[2] improves vhost_get_avail_idx() so that smp_rmb() is applied if
         needed. Besides, the sanity checks on the retrieved available
         queue index are also squeezed to vhost_get_avail_idx()
PATCH[3] improves vhost_get_avail_head(), similar to what we're doing
         for vhost_get_avail_idx(), so that the relevant sanity checks
         on the head are squeezed to vhost_get_avail_head()
PATCH[4] Reformat vhost_{get, put}_user() by using tab instead of space
         as the terminator for each line

Gavin Shan (4):
  vhost: Drop variable last_avail_idx in vhost_get_vq_desc()
  vhost: Improve vhost_get_avail_idx() with smp_rmb()
  vhost: Improve vhost_get_avail_head()
  vhost: Reformat vhost_{get, put}_user()

 drivers/vhost/vhost.c | 199 +++++++++++++++++++-----------------------
 1 file changed, 88 insertions(+), 111 deletions(-)

-- 
2.44.0