dma_addressing_limited(9)

💅 dma_addressing_limited(9) — Kernel API Manual ✨

okay so bestie, welcome to the Kernel API Manual page for dma_addressing_limited(9) — it’s giving “tiny yes/no vibe check for DMA masks” and honestly? iconic. 🎀

🌸 NAME 🌸

dma_addressing_limited — return if the device is addressing limited 💖

✨ SYNOPSIS ✨

bool dma_addressing_limited (struct device *dev );

🎀 ARGUMENTS 🎀

• dev — device to check 👀

🦋 DESCRIPTION 🦋

Return true if the device’s DMA mask is too small to address all memory in the system, else false. Lack of addressing bits is the prime reason for bounce buffering, but might not be the only one. 💅

bestie, this is a yes/no check, not a whole essay — but the “might not be the only one” part is lowkey important. 🫶

🔥 SEE ALSO 🔥

• Kernel file ./kernel/dma/mapping.c
• dmam_free_coherent(9)
• dmam_alloc_attrs(9)
• dma_map_sg_attrs(9)
• dma_map_sgtable(9)
• dma_need_unmap(9)
• dma_can_mmap(9)
• dma_mmap_attrs(9)

source/version: ./kernel/dma · date: October 2026 · page: dma_addressing_limited(9) — mwah, slay, bye bestie 💋✨