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Diffstat (limited to 'fs/dlm/user.c')
-rw-r--r--fs/dlm/user.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/fs/dlm/user.c b/fs/dlm/user.c
index ebbcf38fd33..f976f303c19 100644
--- a/fs/dlm/user.c
+++ b/fs/dlm/user.c
@@ -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;
}