diff options
| author | Thomas Hellstrom <thellstrom@vmware.com> | 2009-07-24 09:57:34 +0200 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2009-07-29 15:56:13 +1000 |
| commit | 542c6f6df51327dbb180cf4d9b34827e147efe17 (patch) | |
| tree | 04400fb93788c542e1222ba8f33f975090e59e3a /arch/x86/mm/highmem_32.c | |
| parent | 4677f15c60421d48566c48c3149474e64977f071 (diff) | |
| download | op-kernel-dev-542c6f6df51327dbb180cf4d9b34827e147efe17.zip op-kernel-dev-542c6f6df51327dbb180cf4d9b34827e147efe17.tar.gz | |
drm/ttm: Fix ttm in-kernel copying of pages with non-standard caching attributes.
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>
Diffstat (limited to 'arch/x86/mm/highmem_32.c')
0 files changed, 0 insertions, 0 deletions
