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authorSouptick Joarder <jrdr.linux@gmail.com>2020-07-12 06:39:55 +0300
committerJuergen Gross <jgross@suse.com>2020-08-03 08:43:16 +0300
commitff669aa8124035a432d2b7eecdd876b308cd48ee (patch)
tree4e4d682384abab7186515ca002d94c7f8fed39db /drivers/xen
parenta0c34d225183fd4aca61dccb50e5783fa2f26db1 (diff)
downloadlinux-ff669aa8124035a432d2b7eecdd876b308cd48ee.tar.xz
xen/privcmd: 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> Reviewed-by: Juergen Gross <jgross@suse.com> Reviewed-by: Paul Durrant <paul@xen.org> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Paul Durrant <xadimgnik@gmail.com> Link: https://lore.kernel.org/r/1594525195-28345-4-git-send-email-jrdr.linux@gmail.com Signed-off-by: Juergen Gross <jgross@suse.com>
Diffstat (limited to 'drivers/xen')
-rw-r--r--drivers/xen/privcmd.c10
1 files changed, 2 insertions, 8 deletions
diff --git a/drivers/xen/privcmd.c b/drivers/xen/privcmd.c
index aa8ca58e6efc..095d683ad574 100644
--- a/drivers/xen/privcmd.c
+++ b/drivers/xen/privcmd.c
@@ -594,7 +594,7 @@ static int lock_pages(
if (requested > nr_pages)
return -ENOSPC;
- page_count = get_user_pages_fast(
+ page_count = pin_user_pages_fast(
(unsigned long) kbufs[i].uptr,
requested, FOLL_WRITE, pages);
if (page_count < 0)
@@ -610,13 +610,7 @@ static int lock_pages(
static void unlock_pages(struct page *pages[], unsigned int nr_pages)
{
- unsigned int i;
-
- for (i = 0; i < nr_pages; i++) {
- if (!PageDirty(pages[i]))
- set_page_dirty_lock(pages[i]);
- put_page(pages[i]);
- }
+ unpin_user_pages_dirty_lock(pages, nr_pages, true);
}
static long privcmd_ioctl_dm_op(struct file *file, void __user *udata)