Merge branch 'bkl-removal' of git://git.lwn.net/linux-2.6

* 'bkl-removal' of git://git.lwn.net/linux-2.6: (146 commits)
  IB/umad: BKL is not needed for ib_umad_open()
  IB/uverbs: BKL is not needed for ib_uverbs_open()
  bf561-coreb: BKL unneeded for open()
  Call fasync() functions without the BKL
  snd/PCM: fasync BKL pushdown
  ipmi: fasync BKL pushdown
  ecryptfs: fasync BKL pushdown
  Bluetooth VHCI: fasync BKL pushdown
  tty_io: fasync BKL pushdown
  tun: fasync BKL pushdown
  i2o: fasync BKL pushdown
  mpt: fasync BKL pushdown
  Remove BKL from remote_llseek v2
  Make FAT users happier by not deadlocking
  x86-mce: BKL pushdown
  vmwatchdog: BKL pushdown
  vmcp: BKL pushdown
  via-pmu: BKL pushdown
  uml-random: BKL pushdown
  uml-mmapper: BKL pushdown
  ...

1 files changed, 9 insertions, 3 deletions

diff --git a/drivers/s390/char/vmur.c b/drivers/s390/char/vmur.c
index 49cba9effe89..0a9f1cccbe58 100644
--- a/drivers/s390/char/vmur.c
+++ b/drivers/s390/char/vmur.c
@@ -9,6 +9,7 @@
  */
 
 #include <linux/cdev.h>
+#include <linux/smp_lock.h>
 
 #include <asm/uaccess.h>
 #include <asm/cio.h>
@@ -669,7 +670,7 @@ static int ur_open(struct inode *inode, struct file *file)
 
 	if (accmode == O_RDWR)
 		return -EACCES;
-
+	lock_kernel();
 	/*
 	 * We treat the minor number as the devno of the ur device
 	 * to find in the driver tree.
@@ -677,8 +678,10 @@ static int ur_open(struct inode *inode, struct file *file)
 	devno = MINOR(file->f_dentry->d_inode->i_rdev);
 
 	urd = urdev_get_from_devno(devno);
-	if (!urd)
-		return -ENXIO;
+	if (!urd) {
+		rc = -ENXIO;
+		goto out;
+	}
 
 	spin_lock(&urd->open_lock);
 	while (urd->open_flag) {
@@ -721,6 +724,7 @@ static int ur_open(struct inode *inode, struct file *file)
 		goto fail_urfile_free;
 	urf->file_reclen = rc;
 	file->private_data = urf;
+	unlock_kernel();
 	return 0;
 
 fail_urfile_free:
@@ -731,6 +735,8 @@ fail_unlock:
 	spin_unlock(&urd->open_lock);
 fail_put:
 	urdev_put(urd);
+out:
+	unlock_kernel();
 	return rc;
 }