comedi_alloc_spriv(9)

💖 comedi_alloc_spriv(9) 💖

okay so bestie, welcome to the Kernel API Manual — this is the page for comedi_alloc_spriv(9), and it's literally the "get your subdevice a little memory bag" function 🎀

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✨ NAME ✨

comedi_alloc_spriv — allocate memory for the subdevice private data 🫶

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🌸 SYNOPSIS 🌸

void * comedi_alloc_spriv (struct comedi_subdevice *s , size_t size );

that's it. that's the whole signature. no cap 💅

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🦋 ARGUMENTS 🦋

• s — the COMEDI subdevice 👑
• size — how big the memory chunk you want should be, in bytes 🍓

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💜 DESCRIPTION 💜

so what it does is: it allocates memory for the subdevice private data and points s->private at it. iconic behaviour, honestly ✨

and here's the slay part — that memory gets freed automatically when the COMEDI device is detached from the low-level driver. you don't have to remember to clean up, it just handles it. main character energy fr fr 💅

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🌈 RETURN 🌈

• On success: a pointer to the allocated memory, which is s->private 💖
• On failure: NULL 😭

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⭐ SEE ALSO ⭐

go read these next, bestie, iykyk:

• Kernel file ./drivers/comedi/comedi_fops.c struct comedi_file(9)
• comedi_dev_put(9)
• comedi_dev_get_from_minor(9)
• comedi_is_subdevice_running(9)
• comedi_get_is_subdevice_running(9)
• comedi_put_is_subdevice_running(9)
• comedi_set_spriv_auto_free(9)
• get_valid_routes(9)
• comedi_event(9)

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quick vibe check: the free is automatic on detach — you're not supposed to be out here manually wrangling it, so just point your s->private at the shiny new pointer and go 🧚

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and that's the whole page! 💀 source is ./drivers/comedi, dated October 2026, page title comedi_alloc_spriv(9) — k byeeee, go allocate responsibly 🌸🦋💖