From: Roman Gushchin <guro@fb.com>
Date: Fri, 6 Jul 2018 14:34:29 -0700
Subject: bpf: include errno.h from bpf-cgroup.h
Patch-mainline: v4.18-rc6
Git-commit: f292b87d3ac020418644d8a4bbf29814890505cb
References: bsc#1109837

Commit fdb5c4531c1e ("bpf: fix attach type BPF_LIRC_MODE2 dependency
wrt CONFIG_CGROUP_BPF") caused some build issues, detected by 0-DAY
kernel test infrastructure.

The problem is that cgroup_bpf_prog_attach/detach/query() functions
can return -EINVAL error code, which is not defined. Fix this adding
errno.h to includes.

Fixes: fdb5c4531c1e ("bpf: fix attach type BPF_LIRC_MODE2 dependency wrt CONFIG_CGROUP_BPF")
Signed-off-by: Roman Gushchin <guro@fb.com>
Cc: Sean Young <sean@mess.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 include/linux/bpf-cgroup.h |    1 +
 1 file changed, 1 insertion(+)

--- a/include/linux/bpf-cgroup.h
+++ b/include/linux/bpf-cgroup.h
@@ -1,6 +1,7 @@
 #ifndef _BPF_CGROUP_H
 #define _BPF_CGROUP_H
 
+#include <linux/errno.h>
 #include <linux/jump_label.h>
 #include <uapi/linux/bpf.h>