hl_mmap_mem_buf_put(9)

📦 version 7.3.1, in nixpkgs unstable

💅 hl_mmap_mem_buf_put(9) — the kernel API manual, bestie edition 🎀

okay so this is a page from the Kernel API Manual, section 9, and it's all about hl_mmap_mem_buf_put — one tiny function with main character energy. let's get into it ✨

🌸 NAME 🌸

hl_mmap_mem_buf_put — decrease the reference to the buffer 💖

like, it literally drops the refcount. that's the whole gig. no cap.

🦋 SYNOPSIS 🦋

int hl_mmap_mem_buf_put (struct hl_mmap_mem_buf *buf );

that's it, that's the signature. she's short, she's sweet, she returns an int 👑

🎀 ARGUMENTS 🎀

  • buf — memory manager buffer descriptor 🫶 this is the buffer struct you're passing in, the one you're about to put (i.e. drop a reference on). it's a struct hl_mmap_mem_buf *, so you know exactly what you're dealing with.

✨ DESCRIPTION ✨

so here's the vibe: this function decreases the reference to the buffer, and if that was the last reference, it releases the buffer. literally "you're the last one out, turn off the lights" energy 💡

⚠️ important, bestie: this shall be called from an interrupt context. not a regular context. interrupt context. fr fr. don't be out here calling it from wherever, okay? 😭

like the way that this is such a small function but the context requirement is doing the most. respect it. 🙈

🔥 SEE ALSO 🔥

  • Kernel file: ./drivers/accel/habanalabs/common/memory_mgr.c 📁 (go read it, iykyk)

and the whole friend group of sibling functions, all iconic:

🍓 little reminder: this page is from ./drivers/accel/habanalabs/common, and the manual is dated October 2026 for hl_mmap_mem_buf_put(9). that's the source/version and date, and yes she's serving future-dated fairy realness 🧚💜

that's the whole page, bestie — go forth and put responsibly 💅✨🦋

📦 where this page comes from