comedi_buf_read_free(9)

💅 NAME 💅

okay so this is the comedi_buf_read_free(9) page from the Kernel API Manual — folding the manual name in right here so you don’t have to read a boring header line twice, bestie. The whole vibe is literally: comedi_buf_read_free — free buffer space after it has been read. periodt. 🎀

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✨ SYNOPSIS ✨

here’s the exact signature, don’t touch the commas or the line break, she’s sensitive:

unsigned int comedi_buf_read_free (struct comedi_subdevice *s , unsigned
int nbytes );

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🦋 ARGUMENTS 🦋

• s — the COMEDI subdevice. like, the subdevice we’re talking about, bestie.
• nbytes — maximum space to free in bytes. that’s the ceiling, okay? 💅

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🌸 DESCRIPTION 🌸

Free up to nbytes bytes of buffer space that was previously reserved for reading in the COMEDI acquisition data buffer associated with the subdevice. 🫶

The amount of space freed is limited to the amount that was reserved — no magical extra freeing, no cap, just the reserved amount.

The freed space then becomes available for allocation by the writer. slay. ✨

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💖 RETURN 💖

The amount of space freed, in bytes. that’s it. that’s the whole return value. 💀

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👑 SEE ALSO 👑

Kernel file: ./drivers/comedi/comedi_buf.c — that’s where the magic lives, iykyk. also go peek at:

• comedi_buf_write_alloc(9)
• comedi_buf_write_free(9)
• comedi_buf_read_n_available(9)
• comedi_buf_read_alloc(9)
• comedi_buf_write_samples(9)
• comedi_buf_read_samples(9)

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bye bestie 💜 source: ./drivers/comedi, date: October 2026, page: comedi_buf_read_free(9) from the Kernel API Manual. mwah 🫶✨