[Xen-devel] [PATCH RFC v1 07/12] staging: kpc2000: Prepare transfer_complete_cb() for PG_reserved changes

[David Hildenbrand <david@xxxxxxxxxx>]

Right now, ZONE_DEVICE memory is always set PG_reserved. We want to
change that.

The pages are obtained via get_user_pages_fast(). I assume, these
could be ZONE_DEVICE pages. Let's just exclude them as well explicitly.

Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Vandana BN <bnvandana@xxxxxxxxx>
Cc: "Simon Sandström" <simon@xxxxxxxxxx>
Cc: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Cc: Nishka Dasgupta <nishkadg.linux@xxxxxxxxx>
Cc: Madhumitha Prabakaran <madhumithabiw@xxxxxxxxx>
Cc: Fabio Estevam <festevam@xxxxxxxxx>
Cc: Matt Sickler <Matt.Sickler@xxxxxxxxxxxxxx>
Cc: Jeremy Sowden <jeremy@xxxxxxxxxx>
Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
---
 drivers/staging/kpc2000/kpc_dma/fileops.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/kpc2000/kpc_dma/fileops.c 
b/drivers/staging/kpc2000/kpc_dma/fileops.c
index cb52bd9a6d2f..457adcc81fe6 100644
--- a/drivers/staging/kpc2000/kpc_dma/fileops.c
+++ b/drivers/staging/kpc2000/kpc_dma/fileops.c
@@ -212,7 +212,8 @@ void  transfer_complete_cb(struct aio_cb_data *acd, size_t 
xfr_count, u32 flags)
        BUG_ON(acd->ldev->pldev == NULL);
 
        for (i = 0 ; i < acd->page_count ; i++) {
-               if (!PageReserved(acd->user_pages[i])) {
+               if (!PageReserved(acd->user_pages[i]) &&
+                   !is_zone_device_page(acd->user_pages[i])) {
                        set_page_dirty(acd->user_pages[i]);
                }
        }
-- 
2.21.0


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