This is a note to let you know that I've just added the patch titled powerpc: Fix missing/delayed calls to irq_work to the 3.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: powerpc-fix-missing-delayed-calls-to-irq_work.patch and it can be found in the queue-3.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 230b3034793247f61e6a0b08c44cf415f6d92981 Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> Date: Sat, 15 Jun 2013 12:13:40 +1000 Subject: powerpc: Fix missing/delayed calls to irq_work From: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> commit 230b3034793247f61e6a0b08c44cf415f6d92981 upstream. When replaying interrupts (as a result of the interrupt occurring while soft-disabled), in the case of the decrementer, we are exclusively testing for a pending timer target. However we also use decrementer interrupts to trigger the new "irq_work", which in this case would be missed. This change the logic to force a replay in both cases of a timer boundary reached and a decrementer interrupt having actually occurred while disabled. The former test is still useful to catch cases where a CPU having been hard-disabled for a long time completely misses the interrupt due to a decrementer rollover. Signed-off-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> Tested-by: Steven Rostedt <rostedt@xxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/powerpc/kernel/irq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/powerpc/kernel/irq.c +++ b/arch/powerpc/kernel/irq.c @@ -162,7 +162,7 @@ notrace unsigned int __check_irq_replay( * in case we also had a rollover while hard disabled */ local_paca->irq_happened &= ~PACA_IRQ_DEC; - if (decrementer_check_overflow()) + if ((happened & PACA_IRQ_DEC) || decrementer_check_overflow()) return 0x900; /* Finally check if an external interrupt happened */ Patches currently in stable-queue which might be from benh@xxxxxxxxxxxxxxxxxxx are queue-3.9/powerpc-fix-missing-delayed-calls-to-irq_work.patch queue-3.9/powerpc-fix-emulation-of-illegal-instructions-on-powernv-platform.patch queue-3.9/powerpc-fix-stack-overflow-crash-in-resume_kernel-when-ftracing.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html