synclink_gt: add compat_ioctl

Add support for 32 bit ioctl on 64 bit systems for synclink_gt

Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 24 insertions, 0 deletions

diff --git a/include/linux/synclink.h b/include/linux/synclink.h
index c8b042667af1..5562fbf72095 100644
--- a/include/linux/synclink.h
+++ b/include/linux/synclink.h
@@ -291,4 +291,28 @@ struct gpio_desc {
 #define MGSL_IOCGGPIO           _IOR(MGSL_MAGIC_IOC,17,struct gpio_desc)
 #define MGSL_IOCWAITGPIO        _IOWR(MGSL_MAGIC_IOC,18,struct gpio_desc)
 
+#ifdef __KERNEL__
+/* provide 32 bit ioctl compatibility on 64 bit systems */
+#ifdef CONFIG_COMPAT
+#include <linux/compat.h>
+struct MGSL_PARAMS32 {
+        compat_ulong_t  mode;
+        unsigned char   loopback;
+        unsigned short  flags;
+        unsigned char   encoding;
+        compat_ulong_t  clock_speed;
+        unsigned char   addr_filter;
+        unsigned short  crc_type;
+        unsigned char   preamble_length;
+        unsigned char   preamble;
+        compat_ulong_t  data_rate;
+        unsigned char   data_bits;
+        unsigned char   stop_bits;
+        unsigned char   parity;
+};
+#define MGSL_IOCSPARAMS32 _IOW(MGSL_MAGIC_IOC,0,struct MGSL_PARAMS32)
+#define MGSL_IOCGPARAMS32 _IOR(MGSL_MAGIC_IOC,1,struct MGSL_PARAMS32)
+#endif
+#endif
+
 #endif /* _SYNCLINK_H_ */