On Fri, Jul 24, 2015 at 03:30:13PM +0200, Peter Zijlstra wrote: > > > But do we care if we do hit one? The return from the #DB handler can > > > use a RET. Right? > > Look at do_debug(), it has lovely bits like: > > preempt_conditional_sti(); > > in it, we do _NOT_ want to be re-enabling interrupts if we're called > from an !IF context, that'd be _bad_.
Ah, I forgot the conditional thing was the STI depending on regs->flags & IF.. In any case, better safe than sorry and simply not do #DB ever if !IF. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
