From 01d07820a0df6b6134c1bb75b1e84c9d0cdab3be Mon Sep 17 00:00:00 2001 From: KOSAKI Motohiro Date: Sun, 4 Jan 2009 03:11:05 +0900 Subject: sparseirq: make for_each_irq_desc() more robust Raja reported for_each_irq_desc() has possibility unsafeness: if anyone write folliwing code, for_each_irq_desc() doesn't work as intended: (right now this code does not exist at all) if (safe) for_each_irq_desc(irq, desc) { ... } else panic(); Reported-by: Raja R Harinath Signed-off-by: KOSAKI Motohiro Signed-off-by: Ingo Molnar --- include/linux/irqnr.h | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'include/linux/irqnr.h') diff --git a/include/linux/irqnr.h b/include/linux/irqnr.h index 86af92e9e84c..52ebbb4b161d 100644 --- a/include/linux/irqnr.h +++ b/include/linux/irqnr.h @@ -28,13 +28,17 @@ extern struct irq_desc *irq_to_desc(unsigned int irq); # define for_each_irq_desc(irq, desc) \ for (irq = 0, desc = irq_to_desc(irq); irq < nr_irqs; \ irq++, desc = irq_to_desc(irq)) \ - if (desc) + if (!desc) \ + ; \ + else # define for_each_irq_desc_reverse(irq, desc) \ for (irq = nr_irqs - 1, desc = irq_to_desc(irq); irq >= 0; \ irq--, desc = irq_to_desc(irq)) \ - if (desc) + if (!desc) \ + ; \ + else #endif /* CONFIG_GENERIC_HARDIRQS */ -- cgit v1.2.3