linux-kernel - [PATCH] staging: gdm724: adding kernel endianness header

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Date:	Fri, 8 May 2015 18:29:24 -0500
From:	Jaime Arrocha <jarr@...neldev.net>
To:	gregkh@...uxfoundation.org
Cc:	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
	jonathankim@...semi.com, deanahn@...semi.com, jarrocha@...ux.com
Subject: [PATCH] staging: gdm724: adding kernel endianness header

>From TODO list: remove test for host endian
Included header to gather information about host endianness.
Please let me know if the code addition requires corrections
to meet standards.

Signed-off-by: Jaime Arrocha <jarr@...neldev.net>
---
 drivers/staging/gdm724x/gdm_endian.c |   22 ++++++++++------------
 1 file changed, 10 insertions(+), 12 deletions(-)

diff --git a/drivers/staging/gdm724x/gdm_endian.c b/drivers/staging/gdm724x/gdm_endian.c
index f6cc90a..5dfd9d3 100644
--- a/drivers/staging/gdm724x/gdm_endian.c
+++ b/drivers/staging/gdm724x/gdm_endian.c
@@ -11,27 +11,25 @@
  * GNU General Public License for more details.
  */
 
-#include <linux/slab.h>
+#include<asm/byteorder.h>
+#ifdef __LITTLE_ENDIAN
+#include<linux/byteorder/little_endian.h>
+#define H_ENDIAN ENDIANNESS_LITTLE
+#else
+#include<linux/byteorder/big_endian.h>
+#define H_ENDIAN ENDIANNESS_BIG
+#endif
+
 #include "gdm_endian.h"
 
 void gdm_set_endian(struct gdm_endian *ed, u8 dev_endian)
 {
-	u8 a[2] = {0x12, 0x34};
-	u8 b[2] = {0, };
-	u16 c = 0x1234;
-
 	if (dev_endian == ENDIANNESS_BIG)
 		ed->dev_ed = ENDIANNESS_BIG;
 	else
 		ed->dev_ed = ENDIANNESS_LITTLE;
 
-	memcpy(b, &c, 2);
-
-	if (a[0] != b[0])
-		ed->host_ed = ENDIANNESS_LITTLE;
-	else
-		ed->host_ed = ENDIANNESS_BIG;
-
+	ed->host_ed = H_ENDIAN;
 }
 
 u16 gdm_cpu_to_dev16(struct gdm_endian *ed, u16 x)
-- 
1.7.10.4


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