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ARM: make vectors page inaccessible from userspace
authorRussell King <rmk+kernel@arm.linux.org.uk>
Wed, 31 Jul 2013 20:58:56 +0000 (21:58 +0100)
committerRussell King <rmk+kernel@arm.linux.org.uk>
Thu, 1 Aug 2013 13:31:58 +0000 (14:31 +0100)
If kuser helpers are not provided by the kernel, disable user access to
the vectors page.  With the kuser helpers gone, there is no reason for
this page to be visible to userspace.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

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