bio_await(9)

✨ bio_await(9) — Kernel API Manual ✨

🌸 NAME 🌸

bio_await — call a function on a bio, and wait until it completes. That's the whole plot, no cap. 💅

✨ SYNOPSIS ✨

void bio_await (struct bio *bio , void *priv , void (*submit)(struct bio
*bio, void *priv) );

🎀 ARGUMENTS 🎀

• bio — the bio which describes the I/O. Main character energy.
• priv — private data passed to submit.
• submit — function called to submit the bio.

💅 DESCRIPTION 💅

Okay so here's the vibe: bio_await waits for the bio as well as any bio chained off it after executing the passed-in callback submit. The wait for the bio is set up before calling submit to ensure that the completion is captured — yes, it's giving "don't miss the moment." If submit is NULL, submit_bio is used instead to submit the bio.

⚠️ NOTE ⚠️

Heads up bestie: this overrides the bi_private and bi_end_io fields in the bio. Like, it's literally taking over those fields, so don't act surprised. 🙈

🦋 SEE ALSO 🦋

Kernel file ./block/bio.c is the home base, and the whole squad is:

• bio_reset(9)
• bio_reuse(9)
• bio_chain(9)
• bio_chain_and_submit(9)
• bio_alloc_bioset(9)
• bio_kmalloc(9)
• bio_truncate(9)
• guard_bio_eod(9)
• bio_put(9)
• bio_alloc_clone(9)
• bio_init_clone(9)
• bio_full(9)
• __bio_add_page(9)
• bio_add_virt_nofail(9)
• bio_add_page(9)
• bio_add_folio(9)
• bio_add_vmalloc_chunk(9)
• bio_add_vmalloc(9)
• bio_iov_iter_get_pages(9)
• bio_iov_iter_bounce(9)
• bio_iov_iter_unbounce(9)
• submit_bio_wait(9)
• bdev_rw_virt(9)
• bio_copy_data(9)
• bio_endio(9)
• bio_split(9)
• bio_trim(9)
• bioset_init(9)

💖 source/version: ./block; date: October 2026; page: bio_await(9) — that's the cute sign-off, bestie! 💖