[ 3.5.y.z extended stable ] Patch "vm: add no-mmu vm_iomap_memory() stub" has been added to staging queue

[Luis Henriques]

This is a note to let you know that I have just added a patch titled

    vm: add no-mmu vm_iomap_memory() stub

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From de6c46a912d990769728fe59329f02235f2c0edc Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds at linux-foundation.org>
Date: Sat, 27 Apr 2013 13:25:38 -0700
Subject: [PATCH] vm: add no-mmu vm_iomap_memory() stub

commit 3c0b9de6d37a481673e81001c57ca0e410c72346 upstream.

I think we could just move the full vm_iomap_memory() function into
util.h or similar, but I didn't get any reply from anybody actually
using nommu even to this trivial patch, so I'm not going to touch it any
more than required.

Here's the fairly minimal stub to make the nommu case at least
potentially work.  It doesn't seem like anybody cares, though.

Signed-off-by: Linus Torvalds <torvalds at linux-foundation.org>
Cc: Geert Uytterhoeven <geert at linux-m68k.org>
Cc: Guenter Roeck <linux at roeck-us.net>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 mm/nommu.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/mm/nommu.c b/mm/nommu.c
index a60db99..572c4c0 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1827,6 +1827,16 @@ int remap_pfn_range(struct vm_area_struct *vma, unsigned long addr,
 }
 EXPORT_SYMBOL(remap_pfn_range);

+int vm_iomap_memory(struct vm_area_struct *vma, phys_addr_t start, unsigned long len)
+{
+	unsigned long pfn = start >> PAGE_SHIFT;
+	unsigned long vm_len = vma->vm_end - vma->vm_start;
+
+	pfn += vma->vm_pgoff;
+	return io_remap_pfn_range(vma, vma->vm_start, pfn, vm_len, vma->vm_page_prot);
+}
+EXPORT_SYMBOL(vm_iomap_memory);
+
 int remap_vmalloc_range(struct vm_area_struct *vma, void *addr,
 			unsigned long pgoff)
 {
--
1.8.3.2