Messages in this thread | | | Date | Fri, 13 Apr 2012 09:07:01 -0700 | Subject | Re: [PATCH] ia64: populate the cmpxchg header with appropriate code | From | Tony Luck <> |
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On Thu, Apr 12, 2012 at 2:52 PM, Tony Luck <tony.luck@intel.com> wrote: > IA64 doesn't return a -EFAULT when we poke at the supposedly invalid user > address of "NULL" because we map a special page to catch prefetch references
Leaping to conclusions ... fail :-(
If I change the address from NULL to something that isn't mapped ... I still don't get -EFAULT.
Looking more closely at futex_atomic_cmpxchg_inatomic() for the error case.
-Tony
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