efa_ah_cache_put(9)

💅 efa_ah_cache_put — the "okay bestie, you can let go now" function

So this is a page from the Kernel API Manual, and honestly? It's a short one, but it's iconic. Let's get into it. 🫶

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🌸 NAME

efa_ah_cache_put — put a refcount of an AH cache entry

Like, you're releasing your grip on an entry. Politely. With manners. ✨

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🦋 SYNOPSIS

void efa_ah_cache_put (struct efa_ah_cache *ah_cache , struct
efa_ah_cache_entry *entry );

Returns void, so don't be out here expecting a value back, bestie — it gives nothing and that's the point. 💅

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🎀 ARGUMENTS

• ah_cache — the AH cache itself. The whole vibe container. 👑
• entry — the AH cache entry you're putting. The specific little guy in question. 🐣

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💖 DESCRIPTION

Okay so here's what's happening: you drop the refcount. That's it. That's the whole job. 😌

But then — and this is the main character moment — if that refcount reaches zero, the entry gets removed from the hashtable and freed. So the last one to leave turns off the lights. No cap. 🔥

ngl this is the kind of function where the order of operations actually matters, so like… respect it. 🙈

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⭐ SEE ALSO

• Kernel file ./drivers/infiniband/hw/efa/efa_ah_cache.c — go read the source, it's giving lore. 📖
• efa_ah_cache_get(9) — the counterpart, the "actually hold on to this one" function. They're a matching set, iykyk. 💜

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That's the whole page, bestie — short, sweet, and lowkey doing a lot of heavy lifting with that free-on-zero behaviour. Slay. 🌈

This gem comes to you from ./drivers/infiniband/hw/efa, dated October 2026 — go off, EFA drivers. 🎀✨