Commit cdabce2e authored Aug 14, 2020 by Jiafei Pan Committed by Thomas Gleixner Sep 16, 2020

softirq: Add debug check to __raise_softirq_irqoff()



__raise_softirq_irqoff() must be called with interrupts disabled to protect
the per CPU softirq pending state update against an interrupt and soft
interrupt handling on return from interrupt.

Add a lockdep assertion to validate the calling convention.

[ tglx: Massaged changelog ]

Signed-off-by: Jiafei Pan <Jiafei.Pan@nxp.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20200814045522.45719-1-Jiafei.Pan@nxp.com

parent 856deb86

kernel/softirq.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -481,6 +481,7 @@ void raise_softirq(unsigned int nr)

		void __raise_softirq_irqoff(unsigned int nr)
		{
		lockdep_assert_irqs_disabled();
		trace_softirq_raise(nr);
		or_softirq_pending(1UL << nr);
		}

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