alinux: virtio-fs: export fuse_request_free

task #28910367
virtio-fs will need to use it from outside fs/fuse/dev.c.
Make the symbol visible.
Signed-off-by: NLiu Bo <bo.liu@linux.alibaba.com>
Reviewed-by: NJoseph Qi <joseph.qi@linux.alibaba.com>

fs/fuse/dev.c

@@ -103,6 +103,7 @@ void fuse_request_free(struct fuse_req *req)
 	}
 	kmem_cache_free(fuse_req_cachep, req);
 }
+EXPORT_SYMBOL_GPL(fuse_request_free);
 
 void __fuse_get_request(struct fuse_req *req)
 {