linux-kernel - [PATCH] [media] s5k5baf: Convert use of __constant_cpu_to_be16 to cpu_to

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Date:	Sat, 6 Jun 2015 07:23:27 +0530
From:	Vaishali Thakkar <vthakkar1994@...il.com>
To:	Mauro Carvalho Chehab <mchehab@....samsung.com>
Cc:	Kyungmin Park <kyungmin.park@...sung.com>,
	Andrzej Hajda <a.hajda@...sung.com>,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH] [media] s5k5baf: Convert use of __constant_cpu_to_be16 to
 cpu_to_be16

In little endian cases, macro cpu_to_be16 unfolds to __swab16 which
provides special case for constants. In big endian cases,
__constant_cpu_to_be16 and cpu_to_be16 expand directly to the
same expression. So, replace __constant_cpu_to_be16 with
cpu_to_be16 with the goal of getting rid of the definition of
__constant_cpu_to_be16 completely.

The semantic patch that performs this transformation is as follows:

@@expression x;@@

- __constant_cpu_to_be16(x)
+ cpu_to_be16(x)

Signed-off-by: Vaishali Thakkar <vthakkar1994@...il.com>
---
 drivers/media/i2c/s5k5baf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/i2c/s5k5baf.c b/drivers/media/i2c/s5k5baf.c
index 297ef04..7a43b55 100644
--- a/drivers/media/i2c/s5k5baf.c
+++ b/drivers/media/i2c/s5k5baf.c
@@ -491,7 +491,7 @@ static void s5k5baf_write_arr_seq(struct s5k5baf *state, u16 addr,
 	v4l2_dbg(3, debug, c, "i2c_write_seq(count=%d): %*ph\n", count,
 		 min(2 * count, 64), seq);
 
-	buf[0] = __constant_cpu_to_be16(REG_CMD_BUF);
+	buf[0] = cpu_to_be16(REG_CMD_BUF);
 
 	while (count > 0) {
 		int n = min_t(int, count, ARRAY_SIZE(buf) - 1);
-- 
1.9.1

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