V4L/DVB (7856): cx18/: possible cleanups

This patch contains the following possible cleanups:
- cx18-i2c.c should #include "cx18-i2c.h" for getting the prototypes of
  it's global functions
- make the following needlessly global functions static:
  - cx18-fileops.c:cx18_claim_stream()
  - cx18-fileops.c:cx18_release_stream()
  - cx18-queue.c:cx18_queue_move()
- remove the following unused functions:
  - cx18-driver.c:cx18_waitq()
  - cx18-queue.c:cx18_buf_copy_from_user()
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Reviewed-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/cx18/cx18-driver.c

@@ -164,16 +164,6 @@ MODULE_LICENSE("GPL");
 
 MODULE_VERSION(CX18_VERSION);
 
-int cx18_waitq(wait_queue_head_t *waitq)
-{
-	DEFINE_WAIT(wait);
-
-	prepare_to_wait(waitq, &wait, TASK_INTERRUPTIBLE);
-	schedule();
-	finish_wait(waitq, &wait);
-	return signal_pending(current) ? -EINTR : 0;
-}
-
 /* Generic utility functions */
 int cx18_msleep_timeout(unsigned int msecs, int intr)
 {

drivers/media/video/cx18/cx18-driver.h

@@ -444,9 +444,6 @@ extern spinlock_t cx18_cards_lock;
 /* Return non-zero if a signal is pending */
 int cx18_msleep_timeout(unsigned int msecs, int intr);
 
-/* Wait on queue, returns -EINTR if interrupted */
-int cx18_waitq(wait_queue_head_t *waitq);
-
 /* Read Hauppauge eeprom */
 struct tveeprom; /* forward reference */
 void cx18_read_eeprom(struct cx18 *cx, struct tveeprom *tv);

drivers/media/video/cx18/cx18-fileops.c

@@ -39,7 +39,7 @@
    associated VBI streams are also automatically claimed.
    Possible error returns: -EBUSY if someone else has claimed
    the stream or 0 on success. */
-int cx18_claim_stream(struct cx18_open_id *id, int type)
+static int cx18_claim_stream(struct cx18_open_id *id, int type)
 {
 	struct cx18 *cx = id->cx;
 	struct cx18_stream *s = &cx->streams[type];
@@ -87,7 +87,7 @@ int cx18_claim_stream(struct cx18_open_id *id, int type)
 
 /* This function releases a previously claimed stream. It will take into
    account associated VBI streams. */
-void cx18_release_stream(struct cx18_stream *s)
+static void cx18_release_stream(struct cx18_stream *s)
 {
 	struct cx18 *cx = s->cx;
 	struct cx18_stream *s_vbi;

drivers/media/video/cx18/cx18-fileops.h

@@ -34,12 +34,3 @@ void cx18_stop_capture(struct cx18_open_id *id, int gop_end);
 void cx18_mute(struct cx18 *cx);
 void cx18_unmute(struct cx18 *cx);
 
-/* Utilities */
-
-/* Try to claim a stream for the filehandle. Return 0 on success,
-   -EBUSY if stream already claimed. Once a stream is claimed, it
-   remains claimed until the associated filehandle is closed. */
-int cx18_claim_stream(struct cx18_open_id *id, int type);
-
-/* Release a previously claimed stream. */
-void cx18_release_stream(struct cx18_stream *s);

drivers/media/video/cx18/cx18-i2c.c

@@ -25,6 +25,7 @@
 #include "cx18-cards.h"
 #include "cx18-gpio.h"
 #include "cx18-av-core.h"
+#include "cx18-i2c.h"
 
 #include <media/ir-kbd-i2c.h>
 

drivers/media/video/cx18/cx18-queue.c

@@ -26,17 +26,6 @@
 #include "cx18-queue.h"
 #include "cx18-scb.h"
 
-int cx18_buf_copy_from_user(struct cx18_stream *s, struct cx18_buffer *buf,
-		const char __user *src, int copybytes)
-{
-	if (s->buf_size - buf->bytesused < copybytes)
-		copybytes = s->buf_size - buf->bytesused;
-	if (copy_from_user(buf->buf + buf->bytesused, src, copybytes))
-		return -EFAULT;
-	buf->bytesused += copybytes;
-	return copybytes;
-}
-
 void cx18_buf_swap(struct cx18_buffer *buf)
 {
 	int i;
@@ -159,8 +148,9 @@ static void cx18_queue_move_buf(struct cx18_stream *s, struct cx18_queue *from,
    -ENOMEM is returned if the buffers could not be obtained, 0 if all
    buffers where obtained from the 'from' list and if non-zero then
    the number of stolen buffers is returned. */
-int cx18_queue_move(struct cx18_stream *s, struct cx18_queue *from,
-	struct cx18_queue *steal, struct cx18_queue *to, int needed_bytes)
+static int cx18_queue_move(struct cx18_stream *s, struct cx18_queue *from,
+			   struct cx18_queue *steal, struct cx18_queue *to,
+			   int needed_bytes)
 {
 	unsigned long flags;
 	int rc = 0;

drivers/media/video/cx18/cx18-queue.h

@@ -39,8 +39,6 @@ static inline void cx18_buf_sync_for_device(struct cx18_stream *s,
 				s->buf_size, s->dma);
 }
 
-int cx18_buf_copy_from_user(struct cx18_stream *s, struct cx18_buffer *buf,
-	const char __user *src, int copybytes);
 void cx18_buf_swap(struct cx18_buffer *buf);
 
 /* cx18_queue utility functions */
@@ -48,8 +46,6 @@ void cx18_queue_init(struct cx18_queue *q);
 void cx18_enqueue(struct cx18_stream *s, struct cx18_buffer *buf,
 	struct cx18_queue *q);
 struct cx18_buffer *cx18_dequeue(struct cx18_stream *s, struct cx18_queue *q);
-int cx18_queue_move(struct cx18_stream *s, struct cx18_queue *from,
-       struct cx18_queue *steal, struct cx18_queue *to, int needed_bytes);
 struct cx18_buffer *cx18_queue_find_buf(struct cx18_stream *s, u32 id,
 	u32 bytesused);
 void cx18_flush_queues(struct cx18_stream *s);