From: Kjetil Oftedal <oftedal@xxxxxxxxx> Date: Sun, 26 Dec 2010 13:34:56 +0100 > On 22 December 2010 23:28, David Miller <davem@xxxxxxxxxxxxx> wrote: >> From: Daniel Hellstrom <daniel@xxxxxxxxxxx> >> Date: Wed, 22 Dec 2010 14:23:27 +0100 >> >>> I will try to create a patch for the atomic layer for SMP LEON systems >>> since they have the CASA instruction. >> >> But see my other posting, you still have to fix the irq15 problem. >> >> Merely switching to CASA doesn't mean you don't still have a problem >> because spin_lock_irqsave() and other similar pieces of code expect >> they will not be interrupted by smp_call_function() calls. > > Was SPARC32 SMP in 2.4 also implemented using IRQ15/NMI ? Yes, it's essentially always had this problem. It was less important back then because smp_call_function() was really not used much by generic code. Now it's used everywhere. -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
