diff options
| -rw-r--r-- | linux-core/i915_buffer.c | 5 |
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(); |