From 06459901d55ee2f690b8e1fe084fb03061d617cf Mon Sep 17 00:00:00 2001 From: Bartosz Golaszewski Date: Fri, 9 Nov 2018 18:21:32 +0100 Subject: irq/irq_sim: Store multiple interrupt offsets in a bitmap Two threads can try to fire the irq_sim with different offsets and will end up fighting for the irq_work asignment. Thomas Gleixner suggested a solution based on a bitfield where we set a bit for every offset associated with an interrupt that should be fired and then iterate over all set bits in the interrupt handler. This is a slightly modified solution using a bitmap so that we don't impose a limit on the number of interrupts one can allocate with irq_sim. Suggested-by: Thomas Gleixner Signed-off-by: Bartosz Golaszewski Signed-off-by: Marc Zyngier --- include/linux/irq_sim.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/irq_sim.h b/include/linux/irq_sim.h index 630a57e55db6..4500d453a63e 100644 --- a/include/linux/irq_sim.h +++ b/include/linux/irq_sim.h @@ -16,7 +16,7 @@ struct irq_sim_work_ctx { struct irq_work work; - int irq; + unsigned long *pending; }; struct irq_sim_irq_ctx { -- cgit v1.3-18-gd494