From: Luck, Tony <tony.luck@intel.com>
Date: Tue, 24 Aug 2010 18:44:18 +0000 (-0700)
Subject: guard page for stacks that grow upwards
X-Git-Tag: v2.6.27.55~16
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=207988da56b71bb6882f19c925b40e8349374e2e;p=pandora-kernel.git

guard page for stacks that grow upwards

commit 8ca3eb08097f6839b2206e2242db4179aee3cfb3 upstream.

pa-risc and ia64 have stacks that grow upwards. Check that
they do not run into other mappings. By making VM_GROWSUP
0x0 on architectures that do not ever use it, we can avoid
some unpleasant #ifdefs in check_stack_guard_page().

Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: dann frazier <dannf@debian.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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