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-rw-r--r--include/linux/generic_serial.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/generic_serial.h b/include/linux/generic_serial.h
index 0abe9d9a006..652611a4bdc 100644
--- a/include/linux/generic_serial.h
+++ b/include/linux/generic_serial.h
@@ -12,6 +12,8 @@
#ifndef GENERIC_SERIAL_H
#define GENERIC_SERIAL_H
+#include <linux/mutex.h>
+
struct real_driver {
void (*disable_tx_interrupts) (void *);
void (*enable_tx_interrupts) (void *);
@@ -34,7 +36,7 @@ struct gs_port {
int xmit_head;
int xmit_tail;
int xmit_cnt;
- struct semaphore port_write_sem;
+ struct mutex port_write_mutex;
int flags;
wait_queue_head_t open_wait;
wait_queue_head_t close_wait;