dma_release_from_contiguous(9)

🦋 dma_release_from_contiguous(9)

okay so welcome to the Kernel API Manual entry for dma_release_from_contiguous, bestie ✨ it's giving short-and-sweet kernel energy, and it's literally all about releasing allocated pages. 💅

🌸 NAME 🌸

dma_release_from_contiguous - release allocated pages 🎀

✨ SYNOPSIS ✨

here's the signature, no crumbs:

bool dma_release_from_contiguous (struct device *dev , struct page
       *pages , int count );

🎀 ARGUMENTS 🎀

• dev — pointer to the device for which the pages were allocated 🫶
• pages — the allocated pages 🌈
• count — number of allocated pages 🔢

💖 DESCRIPTION 💖

this function releases memory allocated by dma_alloc_from_contiguous. that's the main character move here. 🍓

it returns false when the provided pages do not belong to a contiguous area, and true otherwise — so yes, it's lowkey doing a vibe check on whether your pages belong to that contiguous area or not. 😭

🧚 SEE ALSO 🧚

Kernel file ./kernel/dma/contiguous.c — go peek at the source, iykyk 👑

• dma_contiguous_get_area_by_idx(9)
• dma_contiguous_reserve(9)
• dma_contiguous_reserve_area(9)
• dma_alloc_from_contiguous(9)
• dma_alloc_contiguous(9)
• dma_free_contiguous(9)

kisses from the ./kernel/dma corner of the tree, October 2026 edition — signing off for dma_release_from_contiguous(9) 💜🫶