From: Heiko Carstens <[EMAIL PROTECTED]> Date: Thu, 8 Feb 2007 21:32:10 +0100
> So either all spin_lock_bh's should be converted to spin_lock, > which would limit smp_call_function()/smp_call_function_single() > to process context & irqs enabled. > Or the spin_lock's could be converted to spin_lock_bh which would > make it possible to call these two functions even if in softirq > context. AFAICS this should be safe. Sparc64 does not allow smp_call_function() from software interrupts either. Same for powerpc, mips, alpha. IA-64 has the inconsistency you've spotted between smp_call_function() and smp_call_function_single(). In short, it's a mess :-) I think it's logically simpler if we disallow smp_call_function*() from any kind of asynchronous context. But I'm sure your driver has a true need for this for some reason. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
