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authorSouptick Joarder <jrdr.linux@gmail.com>2020-09-06 09:51:54 +0300
committerBoris Ostrovsky <boris.ostrovsky@oracle.com>2020-10-05 02:41:33 +0300
commitd6bbc2ff68fd22dd972c684921ea348ed7ffcbb2 (patch)
tree8fbf473e3b9343b6664f124fbdd2dc76cb122e73 /drivers/xen/gntdev.c
parent779055842da5b2e508f3ccf9a8153cb1f704f566 (diff)
downloadlinux-d6bbc2ff68fd22dd972c684921ea348ed7ffcbb2.tar.xz
xen/gntdev.c: Convert get_user_pages*() to pin_user_pages*()
In 2019, we introduced pin_user_pages*() and now we are converting get_user_pages*() to the new API as appropriate. [1] & [2] could be referred for more information. This is case 5 as per document [1]. [1] Documentation/core-api/pin_user_pages.rst [2] "Explicit pinning of user-space pages": https://lwn.net/Articles/807108/ Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Juergen Gross <jgross@suse.com> Cc: David Vrabel <david.vrabel@citrix.com> Link: https://lore.kernel.org/r/1599375114-32360-2-git-send-email-jrdr.linux@gmail.com Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Diffstat (limited to 'drivers/xen/gntdev.c')
-rw-r--r--drivers/xen/gntdev.c10
1 files changed, 2 insertions, 8 deletions
diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c
index 1f32db7b72b2..a36b71286bcf 100644
--- a/drivers/xen/gntdev.c
+++ b/drivers/xen/gntdev.c
@@ -731,7 +731,7 @@ static int gntdev_get_page(struct gntdev_copy_batch *batch, void __user *virt,
unsigned long xen_pfn;
int ret;
- ret = get_user_pages_fast(addr, 1, batch->writeable ? FOLL_WRITE : 0, &page);
+ ret = pin_user_pages_fast(addr, 1, batch->writeable ? FOLL_WRITE : 0, &page);
if (ret < 0)
return ret;
@@ -745,13 +745,7 @@ static int gntdev_get_page(struct gntdev_copy_batch *batch, void __user *virt,
static void gntdev_put_pages(struct gntdev_copy_batch *batch)
{
- unsigned int i;
-
- for (i = 0; i < batch->nr_pages; i++) {
- if (batch->writeable && !PageDirty(batch->pages[i]))
- set_page_dirty_lock(batch->pages[i]);
- put_page(batch->pages[i]);
- }
+ unpin_user_pages_dirty_lock(batch->pages, batch->nr_pages, batch->writeable);
batch->nr_pages = 0;
batch->writeable = false;
}