#include <drm/drmP.h>
#if defined(CONFIG_X86)
+
+/*
+ * clflushopt is an unordered instruction which needs fencing with mfence or
+ * sfence to avoid ordering issues. For drm_clflush_page this fencing happens
+ * in the caller.
+ */
static void
drm_clflush_page(struct page *page)
{
page_virtual = kmap_atomic(page);
for (i = 0; i < PAGE_SIZE; i += size)
- clflush(page_virtual + i);
+ clflushopt(page_virtual + i);
kunmap_atomic(page_virtual);
}
mb();
for (; addr < end; addr += boot_cpu_data.x86_clflush_size)
clflush(addr);
- clflush(end - 1);
+ clflushopt(end - 1);
mb();
return;
}