From: Vineet Gupta <vgupta@synopsys.com>
Date: Fri, 18 Jan 2013 09:42:20 +0000 (+0530)
Subject: ARC: Page Fault handling
X-Git-Tag: v3.9-rc1~25^2~54
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fbd7053a7854b12b0fdc415089c59baabf25c625;p=pandora-kernel.git

ARC: Page Fault handling

This includes recent changes to make handler "retry" and/or "killable"

The killable (early exit) logic is loosely based on how SH implements it
	return if SIGKILL + either of VM_FAULT_OOM or VM_FAULT_RETRY
which is different from Hexagon implementation which would NOT early
exit for
	SIGKILL + VM_FAULT_OOM + !VM_FAULT_RETRY

credits: Non executable stack support from Simon Spooner

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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