linux-kernel - Re: [PATCH 2/3] mm: Convert vm_insert_pfn_prot to vmf_insert_pfn

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Date:	Tue, 26 Jan 2016 23:18:21 -0500
From:	Matthew Wilcox <willy@...ux.intel.com>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	Matthew Wilcox <matthew.r.wilcox@...el.com>,
	Ingo Molnar <mingo@...hat.com>,
	Kees Cook <keescook@...omium.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: Re: [PATCH 2/3] mm: Convert vm_insert_pfn_prot to vmf_insert_pfn_prot

On Mon, Jan 25, 2016 at 09:35:36AM -0800, Andy Lutomirski wrote:
> On Mon, Jan 25, 2016 at 9:25 AM, Matthew Wilcox
> <matthew.r.wilcox@...el.com> wrote:
> > From: Matthew Wilcox <willy@...ux.intel.com>
> >
> > Other than the name, the vmf_ version takes a pfn_t parameter, and
> > returns a VM_FAULT_ code suitable for returning from a fault handler.
> >
> > This patch also prevents vm_insert_pfn() from returning -EBUSY.
> > This is a good thing as several callers handled it incorrectly (and
> > none intentionally treat -EBUSY as a different case from 0).
> >
> > Signed-off-by: Matthew Wilcox <willy@...ux.intel.com>
> 
> This would be even nicer if you added vmf_insert_pfn as well :)

I've sent out patches adding it before ... my most recent attempt on
January 5th tied up with the DAX support for 1GB pages.  I'll keep
sending it until it sticks :-)