mvme16x-rtc: BKL pushdown

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

diff --git a/arch/m68k/mvme16x/rtc.c b/arch/m68k/mvme16x/rtc.c
index e341387..432a9f1 100644 (file)
--- a/arch/m68k/mvme16x/rtc.c
+++ b/arch/m68k/mvme16x/rtc.c
@@ -10,6 +10,7 @@
 #include <linux/errno.h>
 #include <linux/miscdevice.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/ioport.h>
 #include <linux/capability.h>
 #include <linux/fcntl.h>
@@ -127,11 +128,14 @@ static int rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
 
 static int rtc_open(struct inode *inode, struct file *file)
 {
+       lock_kernel();
        if( !atomic_dec_and_test(&rtc_ready) )
        {
                atomic_inc( &rtc_ready );
+               unlock_kernel();
                return -EBUSY;
        }
+       unlock_kernel();
 
        return 0;
 }