path: root/drivers/char/tb0219.c
diff options
authorJonathan Corbet <corbet@lwn.net>2008-05-18 15:32:43 -0600
committerJonathan Corbet <corbet@lwn.net>2008-06-20 14:05:53 -0600
commitf2b9857eee17797541b845782ade4d7a9d50f843 (patch)
tree914a00afee2ff953199f99f7cf869e3fd83b36bd /drivers/char/tb0219.c
parent0b2806768899dba5967bcd4a3b93eaed9a1dc4f3 (diff)
Add a bunch of cycle_kernel_lock() calls
All of the open() functions which don't need the BKL on their face may still depend on its acquisition to serialize opens against driver initialization. So make those functions acquire then release the BKL to be on the safe side. Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'drivers/char/tb0219.c')
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/char/tb0219.c b/drivers/char/tb0219.c
index db8c2ca2ce4c..6062b62800fd 100644
--- a/drivers/char/tb0219.c
+++ b/drivers/char/tb0219.c
@@ -21,6 +21,7 @@
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/module.h>
+#include <linux/smp_lock.h>
#include <asm/io.h>
#include <asm/reboot.h>
@@ -232,11 +233,11 @@ static ssize_t tanbac_tb0219_write(struct file *file, const char __user *data,
return i;
-/* No BKL needed here; no global resources accessed */
static int tanbac_tb0219_open(struct inode *inode, struct file *file)
unsigned int minor;
+ cycle_kernel_lock();
minor = iminor(inode);
switch (minor) {
case 0:

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