rcu_dereference_bh(9)

okay so bestie, welcome to rcu_dereference_bh(9) from the Kernel API Manual — this page is short, iconic, and here to help you fetch an RCU-bh-protected pointer without spiraling 😌💖

💖 NAME 💖

rcu_dereference_bh — fetch an RCU-bh-protected pointer for dereferencing. periodt. ✨

✨ SYNOPSIS ✨

rcu_dereference_bh (p );

🎀 ARGUMENTS 🎀

• p — the pointer you read prior to dereferencing, bestie. That's the whole assignment. 🫶

🌸 DESCRIPTION 🌸

okay so this function is lowkey a delegation queen 👑: it makes rcu_dereference_check do the dirty work. That's literally it. no extra lore, no secret side quest, just that. 💅

🦋 SEE ALSO 🦋

Kernel file ./include/linux/rcupdate.h — go peek, iykyk 👀

• same_state_synchronize_rcu(9)
• cond_resched_tasks_rcu_qs(9)
• rcu_softirq_qs_periodic(9)
• RCU_LOCKDEP_WARN(9)
• lockdep_assert_in_rcu_read_lock(9)
• lockdep_assert_in_rcu_read_lock_bh(9)
• lockdep_assert_in_rcu_read_lock_sched(9)
• lockdep_assert_in_rcu_reader(9)
• unrcu_pointer(9)
• RCU_INITIALIZER(9)
• rcu_assign_pointer(9)
• rcu_replace_pointer(9)
• rcu_access_pointer(9)
• rcu_dereference_check(9)
• rcu_dereference_bh_check(9)
• rcu_dereference_sched_check(9)
• rcu_dereference_all_check(9)
• rcu_dereference_protected(9)
• rcu_dereference(9)
• rcu_dereference_sched(9)
• rcu_dereference_all(9)
• rcu_pointer_handoff(9)
• rcu_read_lock(9)
• rcu_read_unlock(9)
• rcu_read_lock_bh(9)
• rcu_read_unlock_bh(9)
• rcu_read_lock_sched(9)
• rcu_read_unlock_sched(9)
• RCU_INIT_POINTER(9)
• RCU_POINTER_INITIALIZER(9)
• kfree_rcu(9)
• kfree_rcu_mightsleep(9)
• kfree_rcu_nolock(9)
• rcu_head_init(9)
• rcu_head_after_call_rcu(9)

xoxo, your kernel bestie 💖 — source/version: ./include/linux; date: October 2026. 🎀