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 <tglx@linutronix.de>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
diff --git a/include/linux/irq_sim.h b/include/linux/irq_sim.h
index 630a57e..4500d45 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 {