vdo_free_io_submitter(9)

✨ vdo_free_io_submitter 💅

okay bestie, this is a page from the Kernel API Manual (section 9, kernel land, very serious business) and honestly? it's a little one but it's SO important. it's giving "last one to leave the party turns off the lights" energy 🎀

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🌸 NAME 🌸

vdo_free_io_submitter — frees the io_submitter fields and structure, as needed 🫶

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✨ SYNOPSIS ✨

void vdo_free_io_submitter (struct io_submitter *io_submitter );

literally one function, one pointer, no cap 💜

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🦋 ARGUMENTS 🦋

• io_submitter — the I/O submitter data you wanna destroy 🔥 that's the whole vibe, that's the target

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🧚 DESCRIPTION 🧚

okay so here's the tea ☕: this one must be called after vdo_cleanup_io_submitter. no skipping ahead, no main character shortcuts, bestie 🙈

its whole job is releasing resources late in the shutdown process — and the reason is super cute actually: it's to avoid or reduce the chance of race conditions 🏃‍♀️💨 like, it waits its turn so nobody trips over anybody. iconic behavior honestly 👑

💀 fr fr do NOT call this before vdo_cleanup_io_submitter — the ordering is load-bearing, iykyk

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🌈 SEE ALSO 🌈

kernel file ./drivers/md/dm-vdo/io-submitter.c plus this whole squad right here:

• count_all_bios(9)
• assert_in_bio_zone(9)
• send_bio_to_device(9)
• vdo_submit_vio(9)
• get_bio_list(9)
• submit_data_vio(9)
• get_mergeable_locked(9)
• try_bio_map_merge(9)
• vdo_submit_data_vio(9)
• __submit_metadata_vio(9)
• vdo_submit_metadata_vio_wait(9)
• vdo_make_io_submitter(9)
• vdo_cleanup_io_submitter(9)

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⭐ and that's the whole page, bestie — so short and yet so essential 💖

cute lil sign-off: this one lives in ./drivers/md/dm-vdo, dated October 2026, and it's page vdo_free_io_submitter(9) of the Kernel API Manual. go free those resources, queen 👑💅