[PATCH i-g-t 1/3] lib/drmtest: Add IS_ALIGNED macro

[Piórkowski, Piotr]

From: Piotr Piórkowski <piotr.piorkowski at intel.com>

Let's add a new macro that will be used to verify whether one value is
aligned to the other.

Signed-off-by: Piotr Piórkowski <piotr.piorkowski at intel.com>
---
 lib/drmtest.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/lib/drmtest.h b/lib/drmtest.h
index 6bc819734..588d7da17 100644
--- a/lib/drmtest.h
+++ b/lib/drmtest.h
@@ -99,6 +99,15 @@ void __set_forced_driver(const char *name);
  */
 #define ALIGN_DOWN(x, a)	ALIGN((x) - ((a) - 1), (a))
 
+/**
+ * IS_ALIGNED:
+ * @v: value to check
+ * @a: alignment unit in bytes
+ *
+ * Macro to check if value @v is aligned to @a
+ */
+#define IS_ALIGNED(v, a)	(((v) & ((typeof(v))(a) - 1)) == 0)
+
 int __drm_open_device(const char *name, unsigned int chipset);
 void drm_load_module(unsigned int chipset);
 int drm_open_driver(int chipset);
-- 
2.34.1