[RFC PATCH v2 1/2] ARM: iwmmxt: Add missing __user annotations to sigframe accessors

On Tue, Jun 27, 2017 at 06:04:06PM +0100, Dave Martin wrote:

preserve_iwmmxt_context() and restore_iwmmxt_context() lack __user
accessors on their arguments pointing to the user signal frame.

There does not be appear to be a bug here, but this omission is
inconsistent with the crunch and vfp sigframe access functions.

This patch adds the annotations, for consistency.

Signed-off-by: Dave Martin <Dave.Martin@arm.com>

Absolutely the right thing to do.  Please drop this into the patch system,
thanks.

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