dlm-user: BKL pushdown
Arnd Bergmann [Tue, 20 May 2008 17:15:48 +0000 (19:15 +0200)]
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

fs/dlm/user.c

index ebbcf38..f976f30 100644 (file)
@@ -15,6 +15,7 @@
 #include <linux/poll.h>
 #include <linux/signal.h>
 #include <linux/spinlock.h>
+#include <linux/smp_lock.h>
 #include <linux/dlm.h>
 #include <linux/dlm_device.h>
 
@@ -618,13 +619,17 @@ static int device_open(struct inode *inode, struct file *file)
        struct dlm_user_proc *proc;
        struct dlm_ls *ls;
 
+       lock_kernel();
        ls = dlm_find_lockspace_device(iminor(inode));
-       if (!ls)
+       if (!ls) {
+               unlock_kernel();
                return -ENOENT;
+       }
 
        proc = kzalloc(sizeof(struct dlm_user_proc), GFP_KERNEL);
        if (!proc) {
                dlm_put_lockspace(ls);
+               unlock_kernel();
                return -ENOMEM;
        }
 
@@ -636,6 +641,7 @@ static int device_open(struct inode *inode, struct file *file)
        spin_lock_init(&proc->locks_spin);
        init_waitqueue_head(&proc->wait);
        file->private_data = proc;
+       unlock_kernel();
 
        return 0;
 }
@@ -870,6 +876,7 @@ static unsigned int device_poll(struct file *file, poll_table *wait)
 
 static int ctl_device_open(struct inode *inode, struct file *file)
 {
+       cycle_kernel_lock();
        file->private_data = NULL;
        return 0;
 }