Calling `virtio_free_buf` or `kmm_free` inside IRQ may lead to dead lock
inside `mm_free`, so we use a free list to store the buffer and reuse it
next time. Fortunately, NuttX only uses one async buffer at same time,
so we don't need to consider how to free the buffer because we won't
have too many in the free list.
Signed-off-by: Zhe Weng <wengzhe@xiaomi.com>
Most tools used for compliance and SBOM generation use SPDX identifiers
This change brings us a step closer to an easy SBOM generation.
Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
1. Use the virtqueue_xxx_lock() api;
2. Add spinlock for some virtio and vhost drivers that do not
use spinlock to protect the virtqueues;
Signed-off-by: Yongrong Wang <wangyongrong@xiaomi.com>
