local_trylock_irqsave(9)

🎀 NAME 🎀

okay so bestie, meet local_trylock_irqsave(9) — a function from the Kernel API Manual — and its whole vibe is: try to acquire a per CPU local lock, and if it gets acquired, save and disable interrupts. ✨

✨ SYNOPSIS ✨

local_trylock_irqsave (lock , flags );

🌸 ARGUMENTS 🌸

• lock — the lock variable, aka the thing you're trying to snag 💅
• flags — storage for interrupt flags, aka where the interrupt flags live 🎀

💖 DESCRIPTION 💖

This one can be used in any context, such as NMI or HARDIRQ. 🙌 But here's the tea, and it is important: due to locking constrains, it will always fail to acquire the lock in NMI or HARDIRQ context on PREEMPT_RT. Like, not “sometimes,” not “if the stars align” — always. 😭

👑 SEE ALSO 👑

Kernel file ./include/linux/local_lock.h — go look, bestie 🦋 — plus these icons:

• local_lock_init(9)
• local_lock(9)
• local_lock_irq(9)
• local_lock_irqsave(9)
• local_unlock(9)
• local_unlock_irq(9)
• local_unlock_irqrestore(9)
• local_trylock_init(9)
• local_trylock(9)

That's the whole page, bestie. Signed with love from ./include/linux, October 2026, under the title local_trylock_irqsave(9) — mwah 💋✨