drm/ttm: Fix ttm in-kernel copying of pages with non-standard caching attributes.

Browse source

For x86 this affected highmem pages only, since they were always kmapped
cache-coherent, and this is fixed using kmap_atomic_prot().

For other architectures that may not modify the linear kernel map we
resort to vmap() for now, since kmap_atomic_prot() generally uses the
linear kernel map for lowmem pages. This of course comes with a
performance impact and should be optimized when possible.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

...

This commit is contained in:

Thomas Hellstrom 2009-07-24 09:57:34 +02:00 • committed by Dave Airlie

parent 4677f15c60

commit 542c6f6df5

1 changed files with 52 additions and 11 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

63

drivers/gpu/drm/ttm/ttm_bo_util.c

View file