From: Petr Vorel <petr.vorel@xxxxxxxxx>
Subject: uapi: move constants from <linux/kernel.h> to <linux/const.h>
and include <linux/const.h> in UAPI headers instead of <linux/kernel.h>.
The reason is to avoid indirect <linux/sysinfo.h> include when using
some network headers: <linux/netlink.h> or others -> <linux/kernel.h>
-> <linux/sysinfo.h>.
This indirect include causes on MUSL redefinition of struct sysinfo when
included both <sys/sysinfo.h> and some of UAPI headers:
In file included from x86_64-buildroot-linux-musl/sysroot/usr/include/linux/kernel.h:5,
from x86_64-buildroot-linux-musl/sysroot/usr/include/linux/netlink.h:5,
from ../include/tst_netlink.h:14,
from tst_crypto.c:13:
x86_64-buildroot-linux-musl/sysroot/usr/include/linux/sysinfo.h:8:8: error: redefinition of `struct sysinfo'
struct sysinfo {
^~~~~~~
In file included from ../include/tst_safe_macros.h:15,
from ../include/tst_test.h:93,
from tst_crypto.c:11:
x86_64-buildroot-linux-musl/sysroot/usr/include/sys/sysinfo.h:10:8: note: originally defined here
Link: https://lkml.kernel.org/r/20201015190013.8901-1-petr.vorel@xxxxxxxxx
Signed-off-by: Petr Vorel <petr.vorel@xxxxxxxxx>
Suggested-by: Rich Felker <dalias@xxxxxxxxxx>
Acked-by: Rich Felker <dalias@xxxxxxxx>
Cc: Peter Korsgaard <peter@xxxxxxxxxxxxx>
Cc: Baruch Siach <baruch@xxxxxxxxxx>
Cc: Florian Weimer <fweimer@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/uapi/linux/const.h | 5 +++++
include/uapi/linux/ethtool.h | 2 +-
include/uapi/linux/kernel.h | 9 +--------
include/uapi/linux/lightnvm.h | 2 +-
include/uapi/linux/mroute6.h | 2 +-
include/uapi/linux/netfilter/x_tables.h | 2 +-
include/uapi/linux/netlink.h | 2 +-
include/uapi/linux/sysctl.h | 2 +-
8 files changed, 12 insertions(+), 14 deletions(-)
--- a/include/uapi/linux/const.h~uapi-move-constants-from-linux-kernelh-to-linux-consth
+++ a/include/uapi/linux/const.h
@@ -28,4 +28,9 @@
#define _BITUL(x) (_UL(1) << (x))
#define _BITULL(x) (_ULL(1) << (x))
+#define __ALIGN_KERNEL(x, a) __ALIGN_KERNEL_MASK(x, (typeof(x))(a) - 1)
+#define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask))
+
+#define __KERNEL_DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
+
#endif /* _UAPI_LINUX_CONST_H */
--- a/include/uapi/linux/ethtool.h~uapi-move-constants-from-linux-kernelh-to-linux-consth
+++ a/include/uapi/linux/ethtool.h
@@ -14,7 +14,7 @@
#ifndef _UAPI_LINUX_ETHTOOL_H
#define _UAPI_LINUX_ETHTOOL_H
-#include <linux/kernel.h>
+#include <linux/const.h>
#include <linux/types.h>
#include <linux/if_ether.h>
--- a/include/uapi/linux/kernel.h~uapi-move-constants-from-linux-kernelh-to-linux-consth
+++ a/include/uapi/linux/kernel.h
@@ -3,13 +3,6 @@
#define _UAPI_LINUX_KERNEL_H
#include <linux/sysinfo.h>
-
-/*
- * 'kernel.h' contains some often-used function prototypes etc
- */
-#define __ALIGN_KERNEL(x, a) __ALIGN_KERNEL_MASK(x, (typeof(x))(a) - 1)
-#define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask))
-
-#define __KERNEL_DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d))
+#include <linux/const.h>
#endif /* _UAPI_LINUX_KERNEL_H */
--- a/include/uapi/linux/lightnvm.h~uapi-move-constants-from-linux-kernelh-to-linux-consth
+++ a/include/uapi/linux/lightnvm.h
@@ -21,7 +21,7 @@
#define _UAPI_LINUX_LIGHTNVM_H
#ifdef __KERNEL__
-#include <linux/kernel.h>
+#include <linux/const.h>
#include <linux/ioctl.h>
#else /* __KERNEL__ */
#include <stdio.h>
--- a/include/uapi/linux/mroute6.h~uapi-move-constants-from-linux-kernelh-to-linux-consth
+++ a/include/uapi/linux/mroute6.h
@@ -2,7 +2,7 @@
#ifndef _UAPI__LINUX_MROUTE6_H
#define _UAPI__LINUX_MROUTE6_H
-#include <linux/kernel.h>
+#include <linux/const.h>
#include <linux/types.h>
#include <linux/sockios.h>
#include <linux/in6.h> /* For struct sockaddr_in6. */
--- a/include/uapi/linux/netfilter/x_tables.h~uapi-move-constants-from-linux-kernelh-to-linux-consth
+++ a/include/uapi/linux/netfilter/x_tables.h
@@ -1,7 +1,7 @@
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _UAPI_X_TABLES_H
#define _UAPI_X_TABLES_H
-#include <linux/kernel.h>
+#include <linux/const.h>
#include <linux/types.h>
#define XT_FUNCTION_MAXNAMELEN 30
--- a/include/uapi/linux/netlink.h~uapi-move-constants-from-linux-kernelh-to-linux-consth
+++ a/include/uapi/linux/netlink.h
@@ -2,7 +2,7 @@
#ifndef _UAPI__LINUX_NETLINK_H
#define _UAPI__LINUX_NETLINK_H
-#include <linux/kernel.h>
+#include <linux/const.h>
#include <linux/socket.h> /* for __kernel_sa_family_t */
#include <linux/types.h>
--- a/include/uapi/linux/sysctl.h~uapi-move-constants-from-linux-kernelh-to-linux-consth
+++ a/include/uapi/linux/sysctl.h
@@ -23,7 +23,7 @@
#ifndef _UAPI_LINUX_SYSCTL_H
#define _UAPI_LINUX_SYSCTL_H
-#include <linux/kernel.h>
+#include <linux/const.h>
#include <linux/types.h>
#include <linux/compiler.h>
_
