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Date: Tue, 4 Aug 2015 12:15:23 -0700
From: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
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CC: David Daney <david.daney@cavium.com>, <stable@vger.kernel.org>
Subject: Re: MIPS: Make set_pte() SMP safe.
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David,

Did you observe this in real?
The function __get_vm_area_node() allocates a guard page if flag 
VM_NO_GUARD is not used and I don't see any use of it in source.

In past vmap allocated a guard page even unconditionally.

- Leonid.