[src/trunk]: src/sys/external/bsd/drm2/dist/drm/ttm Need the page's uvm objec...

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/c954da0ba59a
branches:  trunk
changeset: 337299:c954da0ba59a
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Fri Apr 10 13:30:01 2015 +0000

description:
Need the page's uvm object lock to do pmap_page_protect.

diffstat:

 sys/external/bsd/drm2/dist/drm/ttm/ttm_bo.c |  2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diffs (15 lines):

diff -r 652297ee0d9e -r c954da0ba59a sys/external/bsd/drm2/dist/drm/ttm/ttm_bo.c
--- a/sys/external/bsd/drm2/dist/drm/ttm/ttm_bo.c       Fri Apr 10 13:02:15 2015 +0000
+++ b/sys/external/bsd/drm2/dist/drm/ttm/ttm_bo.c       Fri Apr 10 13:30:01 2015 +0000
@@ -1624,9 +1624,11 @@
        } else if (bo->ttm != NULL) {
                unsigned i;
 
+               mutex_enter(bo->uvmobj.vmobjlock);
                for (i = 0; i < bo->ttm->num_pages; i++)
                        pmap_page_protect(&bo->ttm->pages[i]->p_vmp,
                            VM_PROT_NONE);
+               mutex_exit(bo->uvmobj.vmobjlock);
        }
 #else
        drm_vma_node_unmap(&bo->vma_node, bdev->dev_mapping);