ds1620: BKL pushdown

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

diff --git a/drivers/char/ds1620.c b/drivers/char/ds1620.c
index 334ad5bbe6b62a244eed91b9731d121244ea4780..34275c6f1da282f14de6a2b3bb9c874b87586de6 100644 (file)
--- a/drivers/char/ds1620.c
+++ b/drivers/char/ds1620.c
@@ -8,6 +8,7 @@
 #include <linux/proc_fs.h>
 #include <linux/capability.h>
 #include <linux/init.h>
+#include <linux/smp_lock.h>
 
 #include <asm/hardware.h>
 #include <asm/mach-types.h>
@@ -208,6 +209,12 @@ static void ds1620_read_state(struct therm *therm)
        therm->hi = cvt_9_to_int(ds1620_in(THERM_READ_TH, 9));
 }
 
+static int ds1620_open(struct inode *inode, struct file *file)
+{
+       cycle_kernel_lock();
+       return nonseekable_open(inode, file);
+}
+
 static ssize_t
 ds1620_read(struct file *file, char __user *buf, size_t count, loff_t *ptr)
 {
@@ -336,7 +343,7 @@ static struct proc_dir_entry *proc_therm_ds1620;
 
 static const struct file_operations ds1620_fops = {
        .owner          = THIS_MODULE,
-       .open           = nonseekable_open,
+       .open           = ds1620_open,
        .read           = ds1620_read,
        .ioctl          = ds1620_ioctl,
 };