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authorArnd Bergmann <arnd@arndb.de>2008-05-20 19:15:50 +0200
committerJonathan Corbet <corbet@lwn.net>2008-06-20 14:05:56 -0600
commit080c2226474fa3060fadce9a2341004f477aadb3 (patch)
tree78576a4f248944bb58e25893a7dec3c63029a94b /drivers/char/ds1620.c
parent7ccef46320ecd52c4d20c8aad592599df76bb7a1 (diff)
downloadlwn-080c2226474fa3060fadce9a2341004f477aadb3.tar.gz
lwn-080c2226474fa3060fadce9a2341004f477aadb3.zip
ds1620: BKL pushdown
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/char/ds1620.c')
-rw-r--r--drivers/char/ds1620.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/char/ds1620.c b/drivers/char/ds1620.c
index 334ad5bbe6b6..34275c6f1da2 100644
--- 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,
};