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-rw-r--r--linux-core/i915_buffer.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/linux-core/i915_buffer.c b/linux-core/i915_buffer.c
index 54aa75ad..ba586888 100644
--- a/linux-core/i915_buffer.c
+++ b/linux-core/i915_buffer.c
@@ -270,10 +270,12 @@ static inline void clflush(volatile void *__p)
static inline void drm_cache_flush_addr(void *virt)
{
+#ifdef cpu_has_clflush
int i;
for (i = 0; i < PAGE_SIZE; i += boot_cpu_data.x86_clflush_size)
clflush(virt+i);
+#endif
}
static inline void drm_cache_flush_page(struct page *p)
@@ -291,6 +293,9 @@ void i915_flush_ttm(struct drm_ttm *ttm)
DRM_MEMORYBARRIER();
#ifdef CONFIG_X86_32
+#ifndef cpu_has_clflush
+#define cpu_has_clflush 0
+#endif
/* Hopefully nobody has built an x86-64 processor without clflush */
if (!cpu_has_clflush) {
wbinvd();