__devres_alloc_node(9)

📦 version 7.3.1, in nixpkgs unstable

💖 __devres_alloc_node(9) 💖

okay so this is a page from the Kernel API Manual, and honestly? it's giving "quiet little allocator that runs the whole device-resource world." bestie, let's get into it ✨

🌸 NAME 🌸

__devres_alloc_node — the function that allocates device resource data. that's it, that's the whole job. and it does it slayfully 💅

🦋 SYNOPSIS 🦋

void * __devres_alloc_node (dr_release_t release , size_t size , gfp_t
gfp , int nid , const char *name );

literally five arguments, no notes. keep reading, they all matter 👑

🎀 ARGUMENTS 🎀

  • release — the release function that this devres is gonna get associated with. like, the cleanup bestie it's bonded to forever 🫶
  • size — the allocation size. how many bytes we're grabbing. yep, size_t and all that ✨
  • gfp — the allocation flags. classic gfp_t core, you already know 🌈
  • nid — the NUMA node. an int. that's the node we're allocating from 🗺️
  • name — the name of the resource. a const char *. yes it's just a label, and no, we're not skipping it 🙈

⭐ DESCRIPTION ⭐

so what actually happens? it allocates devres of size bytes. and the way it does it — wait for it — the allocated area gets zeroed first, and then it gets associated with release.

the pointer it hands back? you can pass that thing straight into other devres_*() functions. it's like a little all-access pass to the devres friend group 💖

ngl this is the lowkey icon of driver cleanup. main character energy for real 🔥

👑 RETURN 👑

pointer to the allocated devres on success 🌸, NULL on failure 💀. that's the whole vibe check — pointer or nothing, no in-between.

🧚 SEE ALSO 🧚

bestie there are so many of these and every single one is staying, ok? peridot. 💜

aaaand that's the page!! 🎀 source spot is ./drivers/base, dated October 2026, same title __devres_alloc_node(9) — mwah, go write some drivers bestie 💋🦋✨

📦 where this page comes from