drmm_cgroup_register_region(9)

💅 drmm_cgroup_register_region — from the Kernel API Manual, bestie ✨

okay so picture this: it's a (9) page, it lives in the Kernel API Manual, and its whole personality is "register a region of a DRM device to cgroups." yes that's the NAME section and yes we're getting into it 🫶

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✨ SYNOPSIS ✨

struct dmem_cgroup_region * drmm_cgroup_register_region (struct
drm_device *dev , const char *region_name , const struct
dmem_cgroup_init *init );

like, copy that exactly before you come for me 💀 it returns a struct dmem_cgroup_region * and it takes three things, that's the whole vibe.

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🎀 ARGUMENTS 🎀

• dev — the device for the region. yeah. that one. 👑
• region_name — the region name for registering, so literally the string that names your region, name it something cute 🌸
• init — initialization parameters for the region. all the setup deets go here ✨

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💖 DESCRIPTION 💖

okay so here's where it gets iconic and honestly a little unhinged — this one decreases the ref-count of dev by one. and then: the device is destroyed if the ref-count drops to zero. that's it. that's the description. 😭

so like, mind the ref-count, bestie, because zero means the device is gone gone. no cap. 🔥

i'm just the messenger fr fr — the page says what it says and we do not editorialize (much) 💅

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🦋 SEE ALSO 🦋

the whole friend group, in the order the page gave them, no cap:

• Kernel file ./drivers/gpu/drm/drm_drv.c driver instance overview(9)
• drm_put_dev(9)
• drm_dev_enter(9)
• drm_dev_exit(9)
• drm_dev_unplug(9)
• drm_dev_set_dma_dev(9)
• drm_dev_wedged_event(9)
• component helper usage recommendations(9)
• __drm_dev_alloc(9)
• drm_dev_alloc(9)
• drm_dev_get(9)
• drm_dev_put(9)
• drm_dev_register(9)
• drm_dev_unregister(9)

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and that's the whole page, bestie!! 🧚 mwah 💜 this little cutie comes to you from ./drivers/gpu/drm, dated October 2026 — go off, October 2026, periodt. 🌈⭐