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uml-random: BKL pushdown

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Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann
2008-05-20 19:16:57 +02:00
committed by Jonathan Corbet
parent bd6859fe83
commit 7eb500d1a0
1 changed files with 3 additions and 0 deletions
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3
arch/um/drivers/random.c
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@@ -7,6 +7,7 @@
* of the GNU General Public License, incorporated herein by reference. * of the GNU General Public License, incorporated herein by reference.
*/ */
#include <linux/sched.h> #include <linux/sched.h>
#include <linux/smp_lock.h>
#include <linux/module.h> #include <linux/module.h>
#include <linux/fs.h> #include <linux/fs.h>
#include <linux/interrupt.h> #include <linux/interrupt.h>
@@ -33,6 +34,8 @@ static DECLARE_WAIT_QUEUE_HEAD(host_read_wait);
static int rng_dev_open (struct inode *inode, struct file *filp) static int rng_dev_open (struct inode *inode, struct file *filp)
{ {
cycle_kernel_lock();
/* enforce read-only access to this chrdev */ /* enforce read-only access to this chrdev */
if ((filp->f_mode & FMODE_READ) == 0) if ((filp->f_mode & FMODE_READ) == 0)
return -EINVAL; return -EINVAL;