ccw_device_stlck_start(9)

📦 version 7.3.1, in nixpkgs unstable

💅 ccw_device_stlck_start(9) — kernel API manual, but make it make sense

okay so bestie, we're in the kernel API manual (yes, that one) and today's main character is ccw_device_stlck_start 💖 it's a function in the s390 channel I/O corner of the world, and honestly? it's giving "quietly does one very specific thing." let's get into it 🎀

✨ NAME ✨

ccw_device_stlck_start — perform unconditional release, no cap 🫶

🌸 SYNOPSIS 🌸

void ccw_device_stlck_start (struct ccw_device *cdev , void *data , void *buf1 , void *buf2 );

the way that signature just lays it all out there 😭 four pointers, zero mystery, we love a straightforward icon.

🦋 ARGUMENTS 🦋

  • cdev — the ccw device. literally the whole point. the main character of the operation 💅
  • data — a data pointer that gets passed along to ccw_device_stlck_done. think of it as the little note you tuck in someone's bag for later 🌸
  • buf1 — data pointer used in the channel program. it's booked and busy 🔥
  • buf2 — data pointer used in the channel program. yes, the sequel. both of them show up in the channel program, okay? ✨

👑 DESCRIPTION 👑

so what does it actually do, you ask? it executes a channel program on cdev to release an existing PGID reservation. that's it, that's the vibe — unconditional release, periodt 🎀

no conditions, no "well maybe," just go. slay.

🌈 SEE ALSO 🌈

the kernel file ./drivers/s390/cio/device_pgid.c is where the lore lives 📖 and while you're in the neighborhood, go say hi to:

they're the friend group, iykyk 🫶

lowkey reminder bestie: this is a kernel-level function, so treat it with the respect it deserves — no reckless calls, we keep it iconic and correct 💜

and that's the whole page, fr fr 🦋 sign-off time: this lil masterpiece comes from ./drivers/s390/cio, dated October 2026 — remember it fondly, bestie, and go execute a channel program responsibly ✨🎀💖

📦 where this page comes from