iio_buffer_poll(9)

💅 iio_buffer_poll(9) — like, the vibe check for your buffer ✨

Okay bestie, so picture this: you're a driver and you need to know if your buffer actually has data waiting for you, right? Enter iio_buffer_poll, straight out of the Kernel API Manual 🎀 — it polls the buffer to find out if it has data. That's it, that's the whole job, and it does it flawlessly, no cap 💖

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✨ SYNOPSIS ✨

__poll_t iio_buffer_poll (struct file *filp , struct poll_table_struct
*wait );

Literally just hand it a file and a wait table and let it cook 🍓

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🌸 ARGUMENTS 🌸

• filp — the file structure pointer, used for device access. Like, your ticket to the device, iykyk 🎟️
• wait — the poll table structure pointer, and this is where the driver adds a wait queue. Your driver's little "hey, wake me when something happens" hookup 🦋

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👑 RETURN 👑

So here's the tea: you get (EPOLLIN | EPOLLRDNORM) back if there's data available for reading 💖 and you get 0 for other cases. That's the whole decision tree, bestie — read-ready or not-read-ready, no in-between 🙈

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🌈 SEE ALSO 🌈

Okay so if you're going down the rabbit hole (and honestly? iconic of you), here's the whole squad from the kernel file ./drivers/iio/industrialio-buffer.c:

• iio_buffer_read(9)
• iio_buffer_wakeup_poll(9)
• iio_scan_mask_set(9)
• struct iio_demux_table(9)
• iio_validate_scan_mask_onehot(9)
• iio_push_to_buffers(9)
• iio_push_to_buffers_with_ts_unaligned(9)
• iio_buffer_release(9)
• iio_buffer_get(9)
• iio_buffer_put(9)
• iio_device_attach_buffer(9)

Go read them all, you'll be so smart, periodt 💅

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Anyways, that's the page 🫶 brought to you by ./drivers/iio, dated October 2026 — one year before the girlies take over the kernel (jk… unless 👀). Mwah, go poll responsibly 💜