iov_iter_restore(9)

💫 iov_iter_restore 💫

okay so bestie, this is a page from the Kernel API Manual and tbh it's a little gem — it's all about putting a &struct iov_iter back exactly the way it was. no cap. 🫶

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✨ NAME ✨

iov_iter_restore — restore a &struct iov_iter to the same state as when iov_iter_save_state() was called. 🎀

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🌸 SYNOPSIS 🌸

void iov_iter_restore (struct iov_iter *i , struct iov_iter_state *state );

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🦋 ARGUMENTS 🦋

• i — the struct iov_iter you're restoring, bestie. it's giving "put me back" energy.
• state — the state you're restoring from. the blueprint. the receipt. 💅

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💖 DESCRIPTION 💖

so basically? you use this after iov_iter_save_state to restore i, in case the operations might have advanced it. like, they got a little carried away and moved forward — main character energy — and now we're yanking them back to where they belong. ✨

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👑 NOTE 👑

lowkey important: this only works on ITER_IOVEC, ITER_BVEC, and ITER_KVEC. that's the whole vibe check. anything else? not invited to the party. 🙈

ngl, don't try to use it on other iterator types — the page is very clear that it only works on those three. periodt. 💀

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🌈 SEE ALSO 🌈

• Kernel file ./lib/iov_iter.c
• _copy_mc_to_iter(9)
• _copy_from_iter_flushcache(9)
• iov_iter_folio_queue(9)
• iov_iter_xarray(9)
• iov_iter_discard(9)
• import_iovec(9)
• iov_iter_extract_pages(9)
• iov_iter_extract_bvecs(9)

like, go read those too, iykyk. 📚

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and that's the whole page, bestie — fr fr. this lil cutie lives in ./lib, it's dated October 2026, and it's filed under iov_iter_restore(9). slay. 💅🔥