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    SubjectRe: [PATCH V6 3/9] virtio: introduce config op to synchronize vring callbacks
    On Fri, May 27, 2022 at 02:01:14PM +0800, Jason Wang wrote:
    >This patch introduces new virtio config op to vring
    >callbacks. Transport specific method is required to make sure the
    >write before this function is visible to the vring_interrupt() that is
    >called after the return of this function. For the transport that
    >doesn't provide synchronize_vqs(), use synchornize_rcu() which
    >synchronize with IRQ implicitly as a fallback.
    >
    >Cc: Thomas Gleixner <tglx@linutronix.de>
    >Cc: Peter Zijlstra <peterz@infradead.org>
    >Cc: "Paul E. McKenney" <paulmck@kernel.org>
    >Cc: Marc Zyngier <maz@kernel.org>
    >Cc: Halil Pasic <pasic@linux.ibm.com>
    >Cc: Cornelia Huck <cohuck@redhat.com>
    >Cc: Vineeth Vijayan <vneethv@linux.ibm.com>
    >Cc: Peter Oberparleiter <oberpar@linux.ibm.com>
    >Cc: linux-s390@vger.kernel.org
    >Reviewed-by: Cornelia Huck <cohuck@redhat.com>
    >Signed-off-by: Jason Wang <jasowang@redhat.com>
    >---
    > include/linux/virtio_config.h | 25 +++++++++++++++++++++++++
    > 1 file changed, 25 insertions(+)

    Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>

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