The patch titled
Subject: xen/privcmd-buf.c: convert to use vm_map_pages_zero()
has been added to the -mm tree. Its filename is
xen-privcmd-bufc-convert-to-use-vm_map_pages_zero.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/xen-privcmd-bufc-convert-to-use-vm_map_pages_zero.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/xen-privcmd-bufc-convert-to-use-vm_map_pages_zero.patch
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------------------------------------------------------
From: Souptick Joarder <jrdr.linux@xxxxxxxxx>
Subject: xen/privcmd-buf.c: convert to use vm_map_pages_zero()
Convert to use vm_map_pages_zero() to map range of kernel memory to user
vma.
This driver has ignored vm_pgoff. We could later "fix" these drivers to
behave according to the normal vm_pgoff offsetting simply by removing the
_zero suffix on the function name and if that causes regressions, it gives
us an easy way to revert.
Link: http://lkml.kernel.org/r/acf678e81d554d01a9b590716ac0ccbdcdf71c25.1552921225.git.jrdr.linux@xxxxxxxxx
Signed-off-by: Souptick Joarder <jrdr.linux@xxxxxxxxx>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
Cc: David Airlie <airlied@xxxxxxxx>
Cc: Heiko Stuebner <heiko@xxxxxxxxx>
Cc: Joerg Roedel <joro@xxxxxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Cc: Juergen Gross <jgross@xxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
Cc: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Cc: Oleksandr Andrushchenko <oleksandr_andrushchenko@xxxxxxxx>
Cc: Pawel Osciak <pawel@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxxx>
Cc: Robin Murphy <robin.murphy@xxxxxxx>
Cc: Russell King <linux@xxxxxxxxxxxxxxx>
Cc: Sandy Huang <hjc@xxxxxxxxxxxxxx>
Cc: Stefan Richter <stefanr@xxxxxxxxxxxxxxxxx>
Cc: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Cc: Thierry Reding <treding@xxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/xen/privcmd-buf.c | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)
--- a/drivers/xen/privcmd-buf.c~xen-privcmd-bufc-convert-to-use-vm_map_pages_zero
+++ a/drivers/xen/privcmd-buf.c
@@ -165,12 +165,8 @@ static int privcmd_buf_mmap(struct file
if (vma_priv->n_pages != count)
ret = -ENOMEM;
else
- for (i = 0; i < vma_priv->n_pages; i++) {
- ret = vm_insert_page(vma, vma->vm_start + i * PAGE_SIZE,
- vma_priv->pages[i]);
- if (ret)
- break;
- }
+ ret = vm_map_pages_zero(vma, vma_priv->pages,
+ vma_priv->n_pages);
if (ret)
privcmd_buf_vmapriv_free(vma_priv);
_
Patches currently in -mm which might be from jrdr.linux@xxxxxxxxx are
mm-introduce-new-vm_map_pages-and-vm_map_pages_zero-api.patch
arm-mm-dma-mapping-convert-to-use-vm_map_pages.patch
drivers-firewire-core-isoc-convert-to-use-vm_map_pages_zero.patch
drm-rockchip-rockchip_drm_gemc-convert-to-use-vm_map_pages.patch
drm-xen-xen_drm_front_gemc-convert-to-use-vm_map_pages.patch
iommu-dma-iommuc-convert-to-use-vm_map_pages.patch
videobuf2-videobuf2-dma-sgc-convert-to-use-vm_map_pages.patch
xen-gntdevc-convert-to-use-vm_map_pages.patch
xen-privcmd-bufc-convert-to-use-vm_map_pages_zero.patch
