spidev: BKL pushdown
Add the BKL to spidev_open(), even though the existing locking looks
adequate.
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
diff --git a/drivers/spi/spidev.c b/drivers/spi/spidev.c
index b3518ca..ab2b769 100644
--- a/drivers/spi/spidev.c
+++ b/drivers/spi/spidev.c
@@ -29,6 +29,7 @@
#include <linux/errno.h>
#include <linux/mutex.h>
#include <linux/slab.h>
+#include <linux/smp_lock.h>
#include <linux/spi/spi.h>
#include <linux/spi/spidev.h>
@@ -393,6 +394,7 @@
struct spidev_data *spidev;
int status = -ENXIO;
+ lock_kernel();
mutex_lock(&device_list_lock);
list_for_each_entry(spidev, &device_list, device_entry) {
@@ -418,6 +420,7 @@
pr_debug("spidev: nothing for minor %d\n", iminor(inode));
mutex_unlock(&device_list_lock);
+ unlock_kernel();
return status;
}