STRUCT CCWGROUP_DRIVER(9)

NAME 💖

okay so bestie, welcome to the Kernel API Manual — this page is literally all about struct ccwgroup_driver, which is, like, the driver for ccw group devices. that's the whole vibe. main character struct energy, no cap 🎀

✨ SYNOPSIS ✨

here's the glow-up in code form, copying it exactly so nobody comes for me:

struct ccwgroup_driver {
    int (*setup) (struct ccwgroup_device *);
    void (*remove) (struct ccwgroup_device *);
    int (*set_online) (struct ccwgroup_device *);
    int (*set_offline) (struct ccwgroup_device *);
    void (*shutdown)(struct ccwgroup_device *);
    struct device_driver driver;
    struct ccw_driver *ccw_driver;
 };

like, look at her. seven whole members. she's serving structure, she's serving function pointers, she's serving embedded driver. iconic 💅

🌸 Members 🌸

bestie, let's go through the cast one by one, they all have a job and they're all doing it:

• setup — this one gets called during device creation to setup the device 🫶 like she's the one setting up the party before anyone arrives.
• remove — called on remove. that's it, that's the job. she shows up when the device is getting taken out 🙈
• set_online — called when the device is set online ⭐ the "we're so back" function, fr fr.
• set_offline — called when the device is set offline 😭 the "it's over" function. opposite energy, same amount of commitment.
• shutdown — called when the device is shut down 💀 she's the one locking up on the way out.
• driver — the embedded driver structure 🦋 lowkey just a struct device_driver chilling inside, being supportive.
• ccw_driver — the supported ccw_driver, and ngl, she's optional 👑 a struct ccw_driver * that doesn't have to be there. queen of "if you want".

heads up bestie: keep track of which of these are plain functions and which are pointers — the synopsis is right there and it does not lie to you 💖

🦋 SEE ALSO 🦋

• Kernel file ./arch/s390/include/asm/ccwgroup.h — go read the header, she's got the lore 🔥
• struct ccwgroup_device(9) — the other half of this whole situation, you literally cannot skip her 💜

and that's the page!! 🎀 written by the good people over at ./arch/s390/include/asm, dated October 2026, and officially titled struct ccwgroup_driver(9) — mwah, slay, periodt 💅✨🌈