diff options
Diffstat (limited to 'drivers/gpu/drm/drm_cache.c')
| -rw-r--r-- | drivers/gpu/drm/drm_cache.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/gpu/drm/drm_cache.c b/drivers/gpu/drm/drm_cache.c index 3bd76e918b5d..03e01b000f7a 100644 --- a/drivers/gpu/drm/drm_cache.c +++ b/drivers/gpu/drm/drm_cache.c @@ -62,10 +62,10 @@ static void drm_cache_flush_clflush(struct page *pages[], { unsigned long i; - mb(); + mb(); /*Full memory barrier used before so that CLFLUSH is ordered*/ for (i = 0; i < num_pages; i++) drm_clflush_page(*pages++); - mb(); + mb(); /*Also used after CLFLUSH so that all cache is flushed*/ } #endif @@ -92,6 +92,7 @@ drm_clflush_pages(struct page *pages[], unsigned long num_pages) #elif defined(__powerpc__) unsigned long i; + for (i = 0; i < num_pages; i++) { struct page *page = pages[i]; void *page_virtual; @@ -125,10 +126,10 @@ drm_clflush_sg(struct sg_table *st) if (static_cpu_has(X86_FEATURE_CLFLUSH)) { struct sg_page_iter sg_iter; - mb(); + mb(); /*CLFLUSH is ordered only by using memory barriers*/ for_each_sg_page(st->sgl, &sg_iter, st->nents, 0) drm_clflush_page(sg_page_iter_page(&sg_iter)); - mb(); + mb(); /*Make sure that all cache line entry is flushed*/ return; } @@ -157,12 +158,13 @@ drm_clflush_virt_range(void *addr, unsigned long length) if (static_cpu_has(X86_FEATURE_CLFLUSH)) { const int size = boot_cpu_data.x86_clflush_size; void *end = addr + length; + addr = (void *)(((unsigned long)addr) & -size); - mb(); + mb(); /*CLFLUSH is only ordered with a full memory barrier*/ for (; addr < end; addr += size) clflushopt(addr); clflushopt(end - 1); /* force serialisation */ - mb(); + mb(); /*Ensure that evry data cache line entry is flushed*/ return; } |