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Diffstat (limited to 'arch/cris/arch-v32/drivers/sync_serial.c')
-rw-r--r--arch/cris/arch-v32/drivers/sync_serial.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/arch/cris/arch-v32/drivers/sync_serial.c b/arch/cris/arch-v32/drivers/sync_serial.c
index ca248f3adb80..a01ae9f3b814 100644
--- a/arch/cris/arch-v32/drivers/sync_serial.c
+++ b/arch/cris/arch-v32/drivers/sync_serial.c
@@ -13,7 +13,7 @@
#include <linux/errno.h>
#include <linux/major.h>
#include <linux/sched.h>
-#include <linux/smp_lock.h>
+#include <linux/mutex.h>
#include <linux/interrupt.h>
#include <linux/poll.h>
#include <linux/init.h>
@@ -145,6 +145,7 @@ typedef struct sync_port
spinlock_t lock;
} sync_port;
+static DEFINE_MUTEX(sync_serial_mutex);
static int etrax_sync_serial_init(void);
static void initialize_port(int portnbr);
static inline int sync_data_avail(struct sync_port *port);
@@ -434,7 +435,7 @@ static int sync_serial_open(struct inode *inode, struct file *file)
reg_dma_rw_cfg cfg = {.en = regk_dma_yes};
reg_dma_rw_intr_mask intr_mask = {.data = regk_dma_yes};
- lock_kernel();
+ mutex_lock(&sync_serial_mutex);
DEBUG(printk(KERN_DEBUG "Open sync serial port %d\n", dev));
if (dev < 0 || dev >= NBR_PORTS || !ports[dev].enabled)
@@ -583,7 +584,7 @@ static int sync_serial_open(struct inode *inode, struct file *file)
port->busy++;
ret = 0;
out:
- unlock_kernel();
+ mutex_unlock(&sync_serial_mutex);
return ret;
}
@@ -966,9 +967,9 @@ static long sync_serial_ioctl(struct file *file,
{
long ret;
- lock_kernel();
+ mutex_lock(&sync_serial_mutex);
ret = sync_serial_ioctl_unlocked(file, cmd, arg);
- unlock_kernel();
+ mutex_unlock(&sync_serial_mutex);
return ret;
}