LinuxKPI: Split linux/container_of.h off from linux/kernel.h

Sponsored by:	Serenity Cyber Security, LLC
Reviewed by:	manu, bz
MFC after:      1 week
Differential Revision:	https://reviews.freebsd.org/D42796

2 files changed, 47 insertions, 8 deletions

diff --git a/sys/compat/linuxkpi/common/include/linux/container_of.h b/sys/compat/linuxkpi/common/include/linux/container_of.h
new file mode 100644
index 000000000000..449507fcf9c1
--- /dev/null
+++ b/sys/compat/linuxkpi/common/include/linux/container_of.h
@@ -0,0 +1,46 @@
+/*-
+ * Copyright (c) 2010 Isilon Systems, Inc.
+ * Copyright (c) 2010 iX Systems, Inc.
+ * Copyright (c) 2010 Panasas, Inc.
+ * Copyright (c) 2017 Matt Macy <mmacy@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice unmodified, this list of conditions, and the following
+ *    disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _LINUXKPI_LINUX_CONTAINER_OF_H
+#define	_LINUXKPI_LINUX_CONTAINER_OF_H
+
+#include <sys/stdint.h>
+
+#include <linux/build_bug.h>
+#include <linux/stddef.h>
+
+#define	container_of(ptr, type, member)				\
+({								\
+	const __typeof(((type *)0)->member) *__p = (ptr);	\
+	(type *)((uintptr_t)__p - offsetof(type, member));	\
+})
+
+#define	typeof_member(type, member)	__typeof(((type *)0)->member)
+
+#endif
diff --git a/sys/compat/linuxkpi/common/include/linux/kernel.h b/sys/compat/linuxkpi/common/include/linux/kernel.h
index 097e22e5d8ea..99ba19e9e25c 100644
--- a/sys/compat/linuxkpi/common/include/linux/kernel.h
+++ b/sys/compat/linuxkpi/common/include/linux/kernel.h
@@ -43,6 +43,7 @@
 #include <linux/bitops.h>
 #include <linux/build_bug.h>
 #include <linux/compiler.h>
+#include <linux/container_of.h>
 #include <linux/stringify.h>
 #include <linux/errno.h>
 #include <linux/sched.h>
@@ -273,12 +274,6 @@ extern int linuxkpi_debug;
 })
 #endif
 
-#define container_of(ptr, type, member)				\
-({								\
-	const __typeof(((type *)0)->member) *__p = (ptr);	\
-	(type *)((uintptr_t)__p - offsetof(type, member));	\
-})
-
 #define	ARRAY_SIZE(x)	(sizeof(x) / sizeof((x)[0]))
 
 #define	u64_to_user_ptr(val)	((void *)(uintptr_t)(val))
@@ -551,8 +546,6 @@ kstrtou8_from_user(const char __user *s, size_t count, unsigned int base,
 #define offsetofend(t, m)	\
         (offsetof(t, m) + sizeof((((t *)0)->m)))
 
-#define	typeof_member(s, e)	typeof(((s *)0)->e)
-
 #define clamp_t(type, _x, min, max)	min_t(type, max_t(type, _x, min), max)
 #define clamp(x, lo, hi)		min( max(x,lo), hi)
 #define	clamp_val(val, lo, hi) clamp_t(typeof(val), val, lo, hi)