https://git.alpinelinux.org/aports/tree/main/linux-headers/0003-remove-inclusion-of-sysinfo.h-in-kernel.h.patch
https://bugs.gentoo.org/828726

From: rofl0r <retnyg@gmx.net>
Date: Mon, 20 Jan 2014 21:31:34 +0100
Subject: [PATCH 3/3] remove inclusion of sysinfo.h in kernel.h

the declaration of struct sysinfo clashes with userspace.
it's not quite clear why that header was included from kernel.h,
as none of its functionality is needed.
--- a/include/uapi/linux/kernel.h
+++ b/include/uapi/linux/kernel.h
@@ -2,7 +2,9 @@
 #ifndef _UAPI_LINUX_KERNEL_H
 #define _UAPI_LINUX_KERNEL_H
 
+#ifdef __GLIBC__
 #include <linux/sysinfo.h>
+#endif
 #include <linux/const.h>
 
 #endif /* _UAPI_LINUX_KERNEL_H */