xe_bo_vma_count_dec_locked(9)

✨ xe_bo_vma_count_dec_locked ✨

okay so bestie, welcome to the Kernel API Manual 💖 this one's a lil function page and it's literally so simple you're gonna slay it. it's giving "one job, does it well" energy, no cap.

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🌸 NAME 🌸

xe_bo_vma_count_dec_locked — account a VMA removal on a BO 🎀

like, it's the little bookkeeper that keeps track of VMAs leaving the party. lowkey iconic.

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🦋 SYNOPSIS 🦋

void xe_bo_vma_count_dec_locked (struct xe_bo *bo );

that's it. that's the whole signature. short and sweet, fr fr. ✨

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🍓 ARGUMENTS 🍓

• bo — buffer object 🫶 (yes, that's the whole description, and honestly? valid. it's the BO. the one and only. main character energy.)

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💅 DESCRIPTION 💅

so what does it actually do? it decrements vma_count. one VMA removed, one less on the counter. girl math but make it kernel. 💀

⚠️ important caveat bestie, do NOT skip this one: the caller must hold the BO's dma-resv lock. like, that's not optional, that's not a vibe suggestion, that's the rule. if you're calling this without the lock held you're not slaying, you're just asking for trouble. 🙈

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🌈 SEE ALSO 🌈

the whole friend group, in order, exactly as listed:

• Kernel file ./drivers/gpu/drm/xe/xe_bo.h enum
• xe_madv_purgeable_state(9)
• xe_bo_is_purged(9)
• xe_bo_madv_is_dontneed(9)
• xe_bo_willneed_get_locked(9)
• xe_bo_willneed_put_locked(9)
• xe_bo_vma_count_inc_locked(9) ← the literal opposite of this function, the evil twin, the inc to this dec 😭
• xe_bo_size(9)
• xe_bo_has_valid_ccs_bb(9)
• xe_bo_put_deferred(9)
• xe_bo_put_async(9)
• xe_bo_sg_is_contiguous(9)
• struct xe_bo_shrink_flags(9)
• xe_bo_is_mem_type(9)

iykyk 👑

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and that's the whole page, bestie!! go forth and decrement responsibly 🧚

this lil gem lives in ./drivers/gpu/drm/xe and it was dated October 2026 — mwah, ty for reading, ily, bye!! 💜🎀