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path: root/drivers/sbus/char/openprom.c
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Diffstat (limited to 'drivers/sbus/char/openprom.c')
-rw-r--r--drivers/sbus/char/openprom.c15
1 files changed, 8 insertions, 7 deletions
diff --git a/drivers/sbus/char/openprom.c b/drivers/sbus/char/openprom.c
index aacbe14e2e7a..8d6e508222b8 100644
--- a/drivers/sbus/char/openprom.c
+++ b/drivers/sbus/char/openprom.c
@@ -33,7 +33,7 @@
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/slab.h>
-#include <linux/smp_lock.h>
+#include <linux/mutex.h>
#include <linux/string.h>
#include <linux/miscdevice.h>
#include <linux/init.h>
@@ -61,6 +61,7 @@ typedef struct openprom_private_data
} DATA;
/* ID of the PROM node containing all of the EEPROM options. */
+static DEFINE_MUTEX(openprom_mutex);
static struct device_node *options_node;
/*
@@ -316,7 +317,7 @@ static long openprom_sunos_ioctl(struct file * file,
if (bufsize < 0)
return bufsize;
- lock_kernel();
+ mutex_lock(&openprom_mutex);
switch (cmd) {
case OPROMGETOPT:
@@ -367,7 +368,7 @@ static long openprom_sunos_ioctl(struct file * file,
}
kfree(opp);
- unlock_kernel();
+ mutex_unlock(&openprom_mutex);
return error;
}
@@ -558,7 +559,7 @@ static int openprom_bsd_ioctl(struct file * file,
void __user *argp = (void __user *)arg;
int err;
- lock_kernel();
+ mutex_lock(&openprom_mutex);
switch (cmd) {
case OPIOCGET:
err = opiocget(argp, data);
@@ -589,7 +590,7 @@ static int openprom_bsd_ioctl(struct file * file,
err = -EINVAL;
break;
};
- unlock_kernel();
+ mutex_unlock(&openprom_mutex);
return err;
}
@@ -697,11 +698,11 @@ static int openprom_open(struct inode * inode, struct file * file)
if (!data)
return -ENOMEM;
- lock_kernel();
+ mutex_lock(&openprom_mutex);
data->current_node = of_find_node_by_path("/");
data->lastnode = data->current_node;
file->private_data = (void *) data;
- unlock_kernel();
+ mutex_unlock(&openprom_mutex);
return 0;
}