bvme6000-rtc: BKL pushdown
Arnd Bergmann [Tue, 20 May 2008 17:15:42 +0000 (19:15 +0200)]
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/m68k/bvme6000/rtc.c

index a812d03..e8ac3f7 100644 (file)
@@ -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>
@@ -140,10 +141,14 @@ static int rtc_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
 
 static int rtc_open(struct inode *inode, struct file *file)
 {
-       if(rtc_status)
+       lock_kernel();
+       if(rtc_status) {
+               unlock_kernel();
                return -EBUSY;
+       }
 
        rtc_status = 1;
+       unlock_kernel();
        return 0;
 }