net: hns3: fix kernel crash when devlink reload during pf initialization

[linux-block.git] / fs / super.c

diff --git a/fs/super.c b/fs/super.c
index ee05ab6b37e769a16a3b1e40cd820c17e0b76d85..71d9779c42b10aca8bd4e0b7b667fc62386e2305 100644 (file)
--- a/fs/super.c
+++ b/fs/super.c
@@ -1515,11 +1515,29 @@ static int fs_bdev_thaw(struct block_device *bdev)
        return error;
 }
 
+static void fs_bdev_super_get(void *data)
+{
+       struct super_block *sb = data;
+
+       spin_lock(&sb_lock);
+       sb->s_count++;
+       spin_unlock(&sb_lock);
+}
+
+static void fs_bdev_super_put(void *data)
+{
+       struct super_block *sb = data;
+
+       put_super(sb);
+}
+
 const struct blk_holder_ops fs_holder_ops = {
        .mark_dead              = fs_bdev_mark_dead,
        .sync                   = fs_bdev_sync,
        .freeze                 = fs_bdev_freeze,
        .thaw                   = fs_bdev_thaw,
+       .get_holder             = fs_bdev_super_get,
+       .put_holder             = fs_bdev_super_put,
 };
 EXPORT_SYMBOL_GPL(fs_holder_ops);