radeon_mn_register(9)

💖 radeon_mn_register(9) 💖

okay bestie, welcome to the Kernel API Manual ✨ this one's a tiny little function from the radeon driver and honestly? she's short but she matters 🎀

🌸 NAME 🌸

radeon_mn_register — register a BO for notifier updates 👑

🦋 SYNOPSIS 🦋

int radeon_mn_register (struct radeon_bo *bo , unsigned long addr );

✨ ARGUMENTS ✨

• bo — the radeon buffer object in question 💅 like, the actual BO you're signing up for notifier watch, no cap
• addr — the userptr addr we should monitor 👀 yes literally that one, the address you want eyes on

🌈 DESCRIPTION 🌈

so the way this works is: it registers an MMU notifier for the given BO at the specified address 🫶 that's the whole vibe. the BO gets monitored, the notifier gets registered, the address gets watched. iconic behavior fr fr.

returns 0 on success 🎉 and -ERRNO if anything goes wrong 😭 (yes, anything — if it breaks, you get the -ERRNO and that's the tea)

ngl this is a real one — if -ERRNO comes back, something went sideways, so don't just ignore it bestie 💀

⭐ SEE ALSO ⭐

• Kernel file ./drivers/gpu/drm/radeon/radeon_mn.c 📁 that's where she lives
• radeon_mn_invalidate(9) 🧚 her friend
• radeon_mn_unregister(9) 💜 the other friend (the one who undoes this, iykyk)

and that's the whole page, bestie 🌸 this lil' gem came out of ./drivers/gpu/drm/radeon and it's dated October 2026 ⭐ slide into radeon_mn_register(9) whenever you need her 💖💅✨