sunrpc: Pushdown the bkl from sunrpc cache ioctl

Pushdown the bkl to cache_ioctl_pipefs.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Neil Brown <neilb@suse.de>
Cc: Nfs <linux-nfs@vger.kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Kacur <jkacur@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>

1 files changed, 10 insertions, 3 deletions

diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
index 39bddba53ba1..91b1adec0d67 100644
--- a/net/sunrpc/cache.c
+++ b/net/sunrpc/cache.c
@@ -33,6 +33,7 @@
 #include <linux/sunrpc/cache.h>
 #include <linux/sunrpc/stats.h>
 #include <linux/sunrpc/rpc_pipe_fs.h>
+#include <linux/smp_lock.h>
 
 #define  RPCDBG_FACILITY RPCDBG_CACHE
 
@@ -1525,12 +1526,18 @@ static unsigned int cache_poll_pipefs(struct file *filp, poll_table *wait)
         return cache_poll(filp, wait, cd);
 }
 
-static int cache_ioctl_pipefs(struct inode *inode, struct file *filp,
+static long cache_ioctl_pipefs(struct file *filp,
                               unsigned int cmd, unsigned long arg)
 {
+        struct inode *inode = filp->f_dentry->d_inode;
         struct cache_detail *cd = RPC_I(inode)->private;
+        long ret;
 
-        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_pipefs(struct inode *inode, struct file *filp)
@@ -1553,7 +1560,7 @@ const struct file_operations cache_file_operations_pipefs = {
         .read           = cache_read_pipefs,
         .write          = cache_write_pipefs,
         .poll           = cache_poll_pipefs,
-        .ioctl          = cache_ioctl_pipefs, /* for FIONREAD */
+        .unlocked_ioctl = cache_ioctl_pipefs, /* for FIONREAD */
         .open           = cache_open_pipefs,
         .release        = cache_release_pipefs,
 };