1 files changed, 11 insertions, 4 deletions

diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
index 39bddba53ba1..77970fe8bff2 100644
--- a/net/sunrpc/cache.c
+++ b/net/sunrpc/cache.c
@@ -28,6 +28,7 @@
 #include <linux/workqueue.h>
 #include <linux/mutex.h>
 #include <linux/pagemap.h>
+#include <linux/smp_lock.h>
 #include <asm/ioctls.h>
 #include <linux/sunrpc/types.h>
 #include <linux/sunrpc/cache.h>
@@ -1331,12 +1332,18 @@ static unsigned int cache_poll_procfs(struct file *filp, poll_table *wait)
         return cache_poll(filp, wait, cd);
 }
 
-static int cache_ioctl_procfs(struct inode *inode, struct file *filp,
-                              unsigned int cmd, unsigned long arg)
+static long cache_ioctl_procfs(struct file *filp,
+                               unsigned int cmd, unsigned long arg)
 {
+        long ret;
+        struct inode *inode = filp->f_path.dentry->d_inode;
         struct cache_detail *cd = PDE(inode)->data;
 
-        return cache_ioctl(inode, filp, cmd, arg, cd);
+        lock_kernel();
+        ret = cache_ioctl(inode, filp, cmd, arg, cd);
+        unlock_kernel();
+
+        return ret;
 }
 
 static int cache_open_procfs(struct inode *inode, struct file *filp)
@@ -1359,7 +1366,7 @@ static const struct file_operations cache_file_operations_procfs = {
         .read           = cache_read_procfs,
         .write          = cache_write_procfs,
         .poll           = cache_poll_procfs,
-        .ioctl          = cache_ioctl_procfs, /* for FIONREAD */
+        .unlocked_ioctl = cache_ioctl_procfs, /* for FIONREAD */
         .open           = cache_open_procfs,
         .release        = cache_release_procfs,
 };