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SubjectRe: [PATCH v2 13/76] ARC: Low level IRQ/Trap/Exception Handling
On Fri, Jan 18, 2013 at 05:54:27PM +0530, Vineet Gupta wrote:

> + ; --- (Slow Path #3) notify_resume ---
> +.Lchk_notify_resume:
> + btst r9, TIF_NOTIFY_RESUME
> + blnz @do_notify_resume
> + b resume_user_mode_begin ; unconditionally back to U mode ret chks
> + ; for single exit point from this block

Umm... Can we even get there without NOTIFY_RESUME? Again, there's
future-proofing and there's laying minefields - think what will happen
if we *do* get there with some bit in _TIF_WORK_MASK that isn't recognized
by any of these cases. Looping forever?


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