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Date: Fri, 21 Aug 2015 11:36:59 +0800
From: yalin wang <yalin.wang2010@...il.com>
To: adaplas@...il.com, plagnioj@...osoft.com, tomi.valkeinen@...com,
linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: yalin wang <yalin.wang2010@...il.com>
Subject: [RFC V2] fbdev/nvidia:change reverse_order() macro
This change reverse_order() to swab32(bitrev32()), so that
it can have better performance on some platforms.
Signed-off-by: yalin wang <yalin.wang2010@...il.com>
---
drivers/video/fbdev/nvidia/nv_local.h | 21 +++++++++++----------
1 file changed, 11 insertions(+), 10 deletions(-)
diff --git a/drivers/video/fbdev/nvidia/nv_local.h b/drivers/video/fbdev/nvidia/nv_local.h
index 68e508d..2c6baa1 100644
--- a/drivers/video/fbdev/nvidia/nv_local.h
+++ b/drivers/video/fbdev/nvidia/nv_local.h
@@ -97,18 +97,19 @@
#ifdef __LITTLE_ENDIAN
+#include <linux/swab.h>
#include <linux/bitrev.h>
+static inline void reverse_order(u32 *data)
+{
+ *data = swab32(bitrev32(*data));
+}
-#define reverse_order(l) \
-do { \
- u8 *a = (u8 *)(l); \
- a[0] = bitrev8(a[0]); \
- a[1] = bitrev8(a[1]); \
- a[2] = bitrev8(a[2]); \
- a[3] = bitrev8(a[3]); \
-} while(0)
#else
-#define reverse_order(l) do { } while(0)
-#endif /* __LITTLE_ENDIAN */
+static inline void reverse_order(u32 *data)
+{
+
+}
+
+#endif /* __LITTLE_ENDIAN */
#endif /* __NV_LOCAL_H__ */
--
1.9.1
--
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