hmm_dma_map_alloc(9)

okay so bestie, welcome to the hmm_dma_map_alloc(9) page from the Kernel API Manual — it's giving "allocate an HMM map structure" energy, and we're gonna get through it together. 💖

🌸 NAME 🌸

hmm_dma_map_alloc — allocate an HMM map structure, no cap. 💅

✨ SYNOPSIS ✨

int hmm_dma_map_alloc (struct device *dev , struct hmm_dma_map *map , size_t nr_entries , size_t dma_entry_size );

🎀 ARGUMENTS 🎀

okay, here's the cast of characters, bestie — every one matters:

• dev — the device you're allocating the structure for. 🫶
• map — the HMM map to allocate. ✨
• nr_entries — the number of entries in the map. 🔢
• dma_entry_size — the size of the DMA entry in the map. 📏

🦋 DESCRIPTION 🦋

so like, hmm_dma_map_alloc allocates the HMM map structure and all the lists it contains. that's the whole vibe. ✨

it returns 0 on success, and -ENOMEM on failure. periodt. 💀

💜 SEE ALSO 💜

peep these, bestie — they're literally right there in the Kernel file ./mm/hmm.c:

• hmm_range_fault(9)
• hmm_range_fault_unlocked_timeout(9)
• hmm_dma_map_free(9)
• hmm_dma_map_pfn(9)
• hmm_dma_unmap_pfn(9)

mwah 💋 — this page is from source/version ./mm, dated October 2026. slay and stay safe out there, bestie. 🎀✨