[SERIAL] turn serial semaphores into mutexes
Turn several drivers/serial/ semaphores-used-as-mutex into mutexes
Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/drivers/serial/crisv10.c b/drivers/serial/crisv10.c
index 08c42c0..be12623 100644
--- a/drivers/serial/crisv10.c
+++ b/drivers/serial/crisv10.c
@@ -442,6 +442,7 @@
#include <linux/init.h>
#include <asm/uaccess.h>
#include <linux/kernel.h>
+#include <linux/mutex.h>
#include <asm/io.h>
#include <asm/irq.h>
@@ -1315,11 +1316,7 @@
* memory if large numbers of serial ports are open.
*/
static unsigned char *tmp_buf;
-#ifdef DECLARE_MUTEX
-static DECLARE_MUTEX(tmp_buf_sem);
-#else
-static struct semaphore tmp_buf_sem = MUTEX;
-#endif
+static DEFINE_MUTEX(tmp_buf_mutex);
/* Calculate the chartime depending on baudrate, numbor of bits etc. */
static void update_char_time(struct e100_serial * info)
@@ -3661,7 +3658,7 @@
* design.
*/
if (from_user) {
- down(&tmp_buf_sem);
+ mutex_lock(&tmp_buf_mutex);
while (1) {
int c1;
c = CIRC_SPACE_TO_END(info->xmit.head,
@@ -3692,7 +3689,7 @@
count -= c;
ret += c;
}
- up(&tmp_buf_sem);
+ mutex_unlock(&tmp_buf_mutex);
} else {
cli();
while (count) {
