intel: Restore manual flush for old kernels

Daniel Vetter pointed out that the automagic flush by the kernel for the
busy-ioctl was only introduced upstream in 2.6.37. So we still need to
manually emit a flush on old kernels.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/intel.h b/src/intel.h
index 48a7cf97..2b114c37 100644
--- a/src/intel.h
+++ b/src/intel.h
@@ -425,6 +425,8 @@ typedef struct intel_screen_private {
 	Bool use_pageflipping;
 	Bool force_fallback;
 	Bool can_blt;
+	Bool has_kernel_flush;
+	Bool needs_flush;
 	Bool use_shadow;
 
 	/* Broken-out options. */