1 files changed, 7 insertions, 5 deletions

diff --git a/arch/um/drivers/hostaudio_kern.c b/arch/um/drivers/hostaudio_kern.c
index 63c740a85b4c..f9f6a4e20590 100644
--- a/arch/um/drivers/hostaudio_kern.c
+++ b/arch/um/drivers/hostaudio_kern.c
@@ -8,7 +8,7 @@
 #include "linux/slab.h"
 #include "linux/sound.h"
 #include "linux/soundcard.h"
-#include "linux/smp_lock.h"
+#include "linux/mutex.h"
 #include "asm/uaccess.h"
 #include "init.h"
 #include "os.h"
@@ -63,6 +63,8 @@ static int set_mixer(char *name, int *add)
 __uml_setup("mixer=", set_mixer, "mixer=<mixer device>\n" MIXER_HELP);
 #endif
 
+static DEFINE_MUTEX(hostaudio_mutex);
+
 /* /dev/dsp file operations */
 
 static ssize_t hostaudio_read(struct file *file, char __user *buffer,
@@ -198,9 +200,9 @@ static int hostaudio_open(struct inode *inode, struct file *file)
                 w = 1;
 
         kparam_block_sysfs_write(dsp);
-        lock_kernel();
+        mutex_lock(&hostaudio_mutex);
         ret = os_open_file(dsp, of_set_rw(OPENFLAGS(), r, w), 0);
-        unlock_kernel();
+        mutex_unlock(&hostaudio_mutex);
         kparam_unblock_sysfs_write(dsp);
 
         if (ret < 0) {
@@ -259,9 +261,9 @@ static int hostmixer_open_mixdev(struct inode *inode, struct file *file)
                 w = 1;
 
         kparam_block_sysfs_write(mixer);
-        lock_kernel();
+        mutex_lock(&hostaudio_mutex);
         ret = os_open_file(mixer, of_set_rw(OPENFLAGS(), r, w), 0);
-        unlock_kernel();
+        mutex_unlock(&hostaudio_mutex);
         kparam_unblock_sysfs_write(mixer);
 
         if (ret < 0) {