tests: Extract ALIGN macro into a common header

Makes for a little bit less code duplication, especially since
it will be used from more callers in the future.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Brad Volkin <bradley.d.volkin@intel.com>
Signed-off-by: Thomas Wood <thomas.wood@intel.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/lib/drmtest.h b/lib/drmtest.h
index f3afbaa8..84f80dc6 100644
--- a/lib/drmtest.h
+++ b/lib/drmtest.h
@@ -60,6 +60,15 @@ static inline void *igt_mmap64(void *addr, size_t length, int prot, int flags,
  */
 #define ARRAY_SIZE(arr) (sizeof(arr)/sizeof(arr[0]))
 
+/**
+ * ALIGN:
+ * @v: value to be aligned
+ * @a: alignment unit in bytes
+ *
+ * Macro to align a value @v to a specified unit @a.
+ */
+#define ALIGN(v, a) (((v) + (a)-1) & ~((a)-1))
+
 int drm_get_card(void);
 int drm_open_any(void);
 int drm_open_any_render(void);