Export only the appropriate GS_xxx flags to userspace from generic_serial.h

Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

include/linux/generic_serial.h

@@ -12,6 +12,7 @@
 #ifndef GENERIC_SERIAL_H
 #define GENERIC_SERIAL_H
 
+#ifdef __KERNEL__
 #include <linux/mutex.h>
 
 struct real_driver {
@@ -54,6 +55,7 @@ struct gs_port {
   spinlock_t              driver_lock;
 };
 
+#endif /* __KERNEL__ */
 
 /* Flags */
 /* Warning: serial.h defines some ASYNC_ flags, they say they are "only"
@@ -75,7 +77,7 @@ struct gs_port {
 #define GS_DEBUG_FLOW    0x00000020
 #define GS_DEBUG_WRITE   0x00000040
 
-
+#ifdef __KERNEL__
 void gs_put_char(struct tty_struct *tty, unsigned char ch);
 int  gs_write(struct tty_struct *tty, 
              const unsigned char *buf, int count);
@@ -94,5 +96,5 @@ int  gs_init_port(struct gs_port *port);
 int  gs_setserial(struct gs_port *port, struct serial_struct __user *sp);
 int  gs_getserial(struct gs_port *port, struct serial_struct __user *sp);
 void gs_got_break(struct gs_port *port);
-
+#endif /* __KERNEL__ */
 #endif