On Tue, Jun 21, 2011 at 14:45, Russell King - ARM Linux <linux@xxxxxxxxxxxxxxxx> wrote: > On Tue, Jun 21, 2011 at 04:31:19PM +0800, TAO HU wrote: >> We got an issue on our OMAP4 SMP system. >> Looks like __und_user(), which was triggered by a user space >> exception, got a page fault hence lead to might_sleep() failure. > > Could you see whether this patch prevents the warning please. > > diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c > index bc0e1d8..d52b940 100644 > --- a/arch/arm/mm/fault.c > +++ b/arch/arm/mm/fault.c > @@ -289,7 +289,7 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs) > * If we're in an interrupt or have no user > * context, we must not take the fault.. > */ > - if (in_atomic() || !mm) > + if (in_atomic() || irqs_disabled() || !mm) > goto no_context; > > /* I am able to trigger the discussed warning on current mainline with a constructed test case, and the above patch does prevent it. Could it please be applied? -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
