linux-kernel - Re: [PATCH v3 03/12] mm: Use get_unmapped_area

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Message-ID: <663bfa89e5ea874c1d96203f113529c618ca1655.camel@intel.com>
Date: Wed, 13 Mar 2024 14:55:30 +0000
From: "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>
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CC: "linux-mm@...ck.org" <linux-mm@...ck.org>, "linux-kernel@...r.kernel.org"
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Subject: Re: [PATCH v3 03/12] mm: Use get_unmapped_area_vmflags()

On Wed, 2024-03-13 at 09:05 +0000, Christophe Leroy wrote:
> 
> What about get_area(), what happens to vm_flags in case that function
> is 
> used ?

Shadow stack can only be private and anonymous memory. So this way is
to avoid unnecessary plumbing. And that plumbing becomes quite
extensive when you start intersecting with the 
f_ops->get_unmapped_area(), so its pretty fortunate.