Commit f121ecfe authored by Thomas Hellstrom's avatar Thomas Hellstrom Committed by Dave Airlie
Browse files

drm/ttm: powerpc: Fix Highmem cache flushing.

Temporarily maps highmem pages while flushing to get a valid virtual
address to flush.
Signed-off-by: default avatarThomas Hellstrom <>
Signed-off-by: default avatarDave Airlie <>
parent 73ba651f
......@@ -86,10 +86,16 @@ void ttm_tt_cache_flush(struct page *pages[], unsigned long num_pages)
unsigned long i;
for (i = 0; i < num_pages; ++i) {
if (pages[i]) {
unsigned long start = (unsigned long)page_address(pages[i]);
flush_dcache_range(start, start + PAGE_SIZE);
struct page *page = pages[i];
void *page_virtual;
if (unlikely(page == NULL))
page_virtual = kmap_atomic(page, KM_USER0);
flush_dcache_range((unsigned long) page_virtual,
(unsigned long) page_virtual + PAGE_SIZE);
kunmap_atomic(page_virtual, KM_USER0);
if (on_each_cpu(ttm_tt_ipi_handler, NULL, 1) != 0)
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment