On Tue, Jun 21, 2011 at 04:31:19PM +0800, TAO HU wrote:
> Hi, All
>
> 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;
/*
--
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