hlist_for_each_entry_rcu(9)

bestie 🫶 welcome to the Kernel API Manual page for hlist_for_each_entry_rcu(9) — it’s giving RCU list traversal, but make it cute 💅✨

🌸 NAME 🌸

hlist_for_each_entry_rcu is here to iterate over rcu list of given type — that’s the whole assignment, periodt 💖

✨ SYNOPSIS ✨

the signature is literally one line of realness, so here it is exactly:

hlist_for_each_entry_rcu (pos , head , member , cond... );

🎀 ARGUMENTS 🎀

okay so four arguments walk into the group chat — let’s meet them 🫶

• pos — the type * to use as a loop cursor. main character pointer energy 💅
• head — the head for your list. literally the head of the whole operation 👑
• member — the name of the hlist_node within the struct. iykyk 🦋
• cond — optional lockdep expression if called from non-RCU protection. optional but iconic ✨

💜 DESCRIPTION 💜

this list-traversal primitive may safely run concurrently with the _rcu list-mutation primitives — such as hlist_add_head_rcu — as long as the traversal is guarded by rcu_read_lock 🔥

that’s the vibe check: safe concurrency, but only with that guard in place. no cap 🫶

🌈 SEE ALSO 🌈

the whole friend group is here — plus the kernel file ./include/linux/rculist.h 🧚

• Kernel file ./include/linux/rculist.h
• list_for_each_rcu(9)
• list_tail_rcu(9)
• list_add_rcu(9)
• list_add_tail_rcu(9)
• list_del_rcu(9)
• list_bidir_del_rcu(9)
• hlist_del_init_rcu(9)
• list_replace_rcu(9)
• list_splice_rcu(9)
• __list_splice_init_rcu(9)
• list_splice_init_rcu(9)
• list_splice_tail_init_rcu(9)
• list_entry_rcu(9)
• list_first_or_null_rcu(9)
• list_next_or_null_rcu(9)
• list_for_each_entry_rcu(9)
• list_for_each_entry_srcu(9)
• list_entry_lockless(9)
• list_for_each_entry_lockless(9)
• list_for_each_entry_continue_rcu(9)
• list_for_each_entry_from_rcu(9)
• hlist_del_rcu(9)
• hlist_replace_rcu(9)
• hlists_swap_heads_rcu(9)
• hlist_add_head_rcu(9)
• hlist_add_tail_rcu(9)
• hlist_add_before_rcu(9)
• hlist_add_behind_rcu(9)
• hlist_for_each_entry_srcu(9)
• hlist_for_each_entry_rcu_notrace(9)
• hlist_for_each_entry_rcu_bh(9)
• hlist_for_each_entry_continue_rcu(9)
• hlist_for_each_entry_continue_rcu_bh(9)
• hlist_for_each_entry_from_rcu(9)

okay bestie that’s the whole page 💖 it lives at ./include/linux, dated October 2026, and the title is hlist_for_each_entry_rcu(9) — bye!! 💅✨