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Some places in the VM code expect interrupts disabled, which is a valid expectation on non-PREEMPT_RT kernels, but does not hold on RT kernels in some places because the RT spinlock substitution does not disable interrupts. To avoid sprinkling CONFIG_PREEMPT_RT conditionals into those places, provide VM_WARN_ON_IRQS_ENABLED() which is only enabled when VM_DEBUG=y and PREEMPT_RT=n. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Michal Hocko <mhocko@suse.com> Link: https://lore.kernel.org/r/20220825164131.402717-5-bigeasy@linutronix.de