[PATCH] The pot() function may be hard to understand. Add comment.

[Homer Hsing]

---
 src/cairo-clip-boxes.c    |    1 +
 src/drm/cairo-drm-intel.c |    1 +
 2 files changed, 2 insertions(+)

diff --git a/src/cairo-clip-boxes.c b/src/cairo-clip-boxes.c
index bbb4197..7b93de6 100644
--- a/src/cairo-clip-boxes.c
+++ b/src/cairo-clip-boxes.c
@@ -52,6 +52,7 @@
 #include "cairo-composite-rectangles-private.h"
 #include "cairo-region-private.h"

+/* return pow (2, ceil (log2 (v))) */
 static inline int
 pot (int v)
 {
diff --git a/src/drm/cairo-drm-intel.c b/src/drm/cairo-drm-intel.c
index d45155e..6c407d2 100644
--- a/src/drm/cairo-drm-intel.c
+++ b/src/drm/cairo-drm-intel.c
@@ -273,6 +273,7 @@ intel_bo_wait (const intel_device_t *device, const
intel_bo_t *bo)
     return ret == 0;
 }

+/* return pow (2, ceil (log2 (v))) */
 static inline int
 pot (int v)
 {
-- 
1.7.9.5