Btrfs: use rcu to protect device->name

[platform/adaptation/renesas_rcar/renesas_kernel.git] / fs / btrfs / disk-io.c

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 5a3bf32..1c9664b 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -44,6 +44,7 @@
 #include "free-space-cache.h"
 #include "inode-map.h"
 #include "check-integrity.h"
+#include "rcu-string.h"
 
 static struct extent_io_ops btree_extent_io_ops;
 static void end_workqueue_fn(struct btrfs_work *work);
@@ -2575,8 +2576,9 @@ static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate)
                struct btrfs_device *device = (struct btrfs_device *)
                        bh->b_private;
 
-               printk_ratelimited(KERN_WARNING "lost page write due to "
-                                  "I/O error on %s\n", device->name);
+               printk_ratelimited_in_rcu(KERN_WARNING "lost page write due to "
+                                         "I/O error on %s\n",
+                                         rcu_str_deref(device->name));
                /* note, we dont' set_buffer_write_io_error because we have
                 * our own ways of dealing with the IO errors
                 */
@@ -2749,8 +2751,8 @@ static int write_dev_flush(struct btrfs_device *device, int wait)
                wait_for_completion(&device->flush_wait);
 
                if (bio_flagged(bio, BIO_EOPNOTSUPP)) {
-                       printk("btrfs: disabling barriers on dev %s\n",
-                              device->name);
+                       printk_in_rcu("btrfs: disabling barriers on dev %s\n",
+                                     rcu_str_deref(device->name));
                        device->nobarriers = 1;
                }
                if (!bio_flagged(bio, BIO_UPTODATE)) {