disk_check_media_change(9)

💅 disk_check_media_change(9) — the kernel API manual, bestie edition 🎀

okay so picture this: it's a page out of the Kernel API Manual, and it's all about one tiny lil function that answers the question every removable-media disk has been dying to ask — did somebody swap the disc while I wasn't looking?? 👀✨

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✨ NAME ✨

disk_check_media_change — check if a removable media has been changed 🦋

like, literally that's the whole job. vibe check for your media. 🔍💖

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🌸 SYNOPSIS 🌸

bool disk_check_media_change (struct gendisk *disk );

yes bestie that's a bool — we're getting a true or a false, no in-between, no "it depends", no 🎲 chaos. icon behaviour fr fr. 👑

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🎀 ARGUMENTS 🎀

• disk — the gendisk you wanna check. that's it. that's the whole argument list. one (1) gendisk, hand it over and let the function cook. 🍓

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💜 DESCRIPTION 💜

so here's the tea ☕: this function looks at your removable media and tells you whether it changed.

• If the media has been changed → it returns true and marks the disk for a partition rescan. 🎉🔥 two-for-one, no cap.
• If the media did not change → it returns false. that's it. nothing happens. go home. 💀

the whole "marks the disk for a partition rescan" part is lowkey the main character energy of this function — you don't just get a yes/no, you get the disk queued up to get looked at again. periodt. 👑✨

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🌈 SEE ALSO 🌈

the whole squad lives in the kernel file ./block/disk-events.c — go say hi:

• disk_block_events(9)
• disk_unblock_events(9)
• disk_flush_events(9)
• disk_clear_events(9)
• disk_force_media_change(9)

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🫶 friendly reminder: this page is filed under ./block and it's dated October 2026 — so yes, the future called, and it's still checking whether you swapped the disc. 💅✨

go off bestie, may all your media changes be detected 🌸🎀🦋