virtqueue_map_need_sync(9)

🌸 NAME 🌸

virtqueue_map_need_sync — check a dma address needs sync 💅✨ This is the virtqueue_map_need_sync(9) page from the Kernel API Manual, bestie.

✨ SYNOPSIS ✨

bool virtqueue_map_need_sync (const struct virtqueue *_vq , dma_addr_t addr );

🎀 ARGUMENTS 🎀

• _vq — the struct virtqueue we're talking about. That's the one, bestie 🫶
• addr — DMA address. The address in question, periodt 📍

🦋 DESCRIPTION 🦋

Okay so the whole assignment is a vibe check for one DMA address: check if the dma address mapped by the virtqueue_map_* APIs needs to be synchronized. That's it, no cap — it's giving tiny but important little bool moment.

The return type is bool 👑 (yes, literally return bool, iconic).

🔥 SEE ALSO 🔥

Kernel file: ./drivers/virtio/virtio_ring.c — and here's the whole squad, all linked up:

• virtqueue_add_sgs(9)
• virtqueue_add_outbuf(9)
• virtqueue_add_outbuf_premapped(9)
• virtqueue_add_inbuf(9)
• virtqueue_add_inbuf_cache_clean(9)
• virtqueue_add_inbuf_ctx(9)
• virtqueue_add_inbuf_premapped(9)
• virtqueue_dma_dev(9)
• virtqueue_kick_prepare(9)
• virtqueue_notify(9)
• virtqueue_kick(9)
• virtqueue_get_buf_ctx(9)
• virtqueue_disable_cb(9)
• virtqueue_enable_cb_prepare(9)
• virtqueue_poll(9)
• virtqueue_enable_cb(9)
• virtqueue_enable_cb_delayed(9)
• virtqueue_detach_unused_buf(9)
• vring_interrupt(9)
• virtqueue_resize(9)
• virtqueue_reset(9)
• virtqueue_get_vring_size(9)
• virtqueue_map_alloc_coherent(9)
• virtqueue_map_free_coherent(9)
• virtqueue_map_page_attrs(9)
• virtqueue_unmap_page_attrs(9)
• virtqueue_map_single_attrs(9)
• virtqueue_unmap_single_attrs(9)
• virtqueue_map_mapping_error(9)
• virtqueue_map_sync_single_range_for_cpu(9)
• virtqueue_map_sync_single_range_for_device(9)

xoxo 💖 this page's source is ./drivers/virtio, its date is October 2026, and it's the virtqueue_map_need_sync(9) page from the Kernel API Manual — slay, bye 🎀