__netmem_address(9)

💅 __netmem_address(9) 💅

okay so welcome to the Kernel API Manual page for __netmem_address(9), bestie — this one is short but lowkey spicy because it's the unsafe shortcut. 🫶

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🏷️ NAME 🏷️

__netmem_address — unsafely get pointer to the memory backing @netmem. yes, the "unsafely" is doing a lot of work there 💀

📜 SYNOPSIS 📜

void * __netmem_address (netmem_ref netmem );

🧾 ARGUMENTS 🧾

• netmem — the netmem reference to get the pointer for. that's the whole argument, she's simple like that ✨

🌸 DESCRIPTION 🌸

okay so this is the unsafe version of netmem_address. When netmem is always page-backed — e.g. when it's a header buffer — it performs faster and generates smaller object code (no check for the LSB). efficiency slay 💅

careful bestie: when netmem points to IOV, this provokes undefined behaviour. not a vibe. not a slay. fr fr.

🎀 RETURN 🎀

pointer to the memory (garbage if netmem is not page-backed). so if it's not page-backed, you're literally getting garbage — do with that what you will 😭

🔗 SEE ALSO 🔗

Kernel file ./include/net/netmem.h:

• netmem_ref(9)
• __netmem_to_page(9)
• virt_to_netmem(9)
• __netmem_to_nmdesc(9)
• __netmem_get_pp(9)
• netmem_is_pfmemalloc(9)

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mwah 💋 and that's the page! source/version: ./include/net; date: October 2026; entry: __netmem_address(9). go forth and be safe about your unsafe calls, bestie 🫶