arm syscall fast path can miss a ptrace syscall-exit

[Russell King - ARM Linux]

On Tue, May 26, 2015 at 03:38:24PM -0700, Josh Stone wrote:
> Hi Russell,
> 
> Do you plan to commit this check for syscall flags?

It's been committed since 15th May, but as it's the only fix I have
queued up (and my focus has been elsewhere) it hasn't been sent yet.
It's been in linux-next for a while now.

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