bpf: Fix sysfs export of empty BTF section

[linux-2.6-microblaze.git] / kernel / bpf / sysfs_btf.c

diff --git a/kernel/bpf/sysfs_btf.c b/kernel/bpf/sysfs_btf.c
index 3b49577..11b3380 100644 (file)
--- a/kernel/bpf/sysfs_btf.c
+++ b/kernel/bpf/sysfs_btf.c
@@ -30,15 +30,15 @@ static struct kobject *btf_kobj;
 
 static int __init btf_vmlinux_init(void)
 {
-       if (!__start_BTF)
+       bin_attr_btf_vmlinux.size = __stop_BTF - __start_BTF;
+
+       if (!__start_BTF || bin_attr_btf_vmlinux.size == 0)
                return 0;
 
        btf_kobj = kobject_create_and_add("btf", kernel_kobj);
        if (!btf_kobj)
                return -ENOMEM;
 
-       bin_attr_btf_vmlinux.size = __stop_BTF - __start_BTF;
-
        return sysfs_create_bin_file(btf_kobj, &bin_attr_btf_vmlinux);
 }