Re: [PATCH bpf-next] libbpf: make bpf_endian co-exist with vmlinux.h

Copy over few #defines from UAPI swab.h header to make all the rest of
bpf_endian.h work and not rely on any extra headers. This way it can be used
both with linux header includes, as well with a vmlinux.h. This has been
a frequent complaint from users, that need this header.

Signed-off-by: Andrii Nakryiko <redacted>
---
 tools/lib/bpf/bpf_endian.h | 22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/tools/lib/bpf/bpf_endian.h b/tools/lib/bpf/bpf_endian.h
index fbe28008450f..a4be8a70845c 100644
--- a/tools/lib/bpf/bpf_endian.h
+++ b/tools/lib/bpf/bpf_endian.h

@@ -2,8 +2,26 @@
 #ifndef __BPF_ENDIAN__
 #define __BPF_ENDIAN__
 
-#include <linux/stddef.h>
-#include <linux/swab.h>
+/* copied from include/uapi/linux/swab.h */