hash_hashed(9)

✨ hash_hashed(9) ✨

okay so bestie, welcome to the hash_hashed page from the Kernel API Manual — yes that's the hash_hashed(9) man page, section 9, we're doing kernel internals today and honestly? iconic of us 💅

🎀 NAME 🎀

hash_hashed — the little vibe check that tells you whether an object is in any hashtable 🦋

🌸 SYNOPSIS 🌸

bool hash_hashed (struct hlist_node *node );

💖 ARGUMENTS 💖

• node — the struct hlist_node of the object you wanna check. like, hand me the node and i'll tell you if it's been hashed anywhere, no cap 🔍

🔥 SEE ALSO 🔥

• Kernel file ./tools/include/linux/hashtable.h — the whole hashtable situation lives here, go look 🫶
• hash_init(9)
• hash_add(9)
• hash_empty(9)
• hash_del(9)
• hash_for_each(9)
• hash_for_each_safe(9)
• hash_for_each_possible(9)
• hash_for_each_possible_safe(9)

all the hashtable besties, fr fr — hash_init to start it up, hash_add to yeet something in, hash_empty for the emptiness check, hash_del to remove, and the whole hash_for_each family to walk it (the _safe ones let you delete while iterating, and _possible narrows to a bucket, iykyk) 🌈

lowkey the whole point: one function, one job, tells you if that node is in any hashtable. no guessing, just vibes and a bool ⭐

and that's the page!! brought to you by the fine folks at ./tools/include/linux, dated October 2026 — mwah, go forth and check your nodes bestie 💜🎀🧚