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A variant of `SpinLock` that ensures interrupts are disabled in the critical section. `lock()` will ensure that either interrupts are already disabled or disable them. `unlock()` will reverse the respective operation. [Boqun: Port to use spin_lock_irq_disable() and spin_unlock_irq_enable()] Signed-off-by: Lyude Paul <lyude@redhat.com> Signed-off-by: Boqun Feng <boqun@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Gary Guo <gary@garyguo.net> Link: https://patch.msgid.link/20260807070218.27144-18-boqun@kernel.org