linux-kernel - [PATCH 3.12 096/127] include/stddef.h: Move offsetofend() from vfio.h to a generic kernel header

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Message-Id: <06bb2cecffea19cbd26beeaf9cdcfb18151ee941.1480062521.git.jslaby@suse.cz>
Date:   Fri, 25 Nov 2016 09:30:09 +0100
From:   Jiri Slaby <jslaby@...e.cz>
To:     stable@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Denys Vlasenko <dvlasenk@...hat.com>,
        Alexei Starovoitov <ast@...mgrid.com>,
        Borislav Petkov <bp@...en8.de>,
        Frederic Weisbecker <fweisbec@...il.com>,
        "H . Peter Anvin" <hpa@...or.com>,
        Kees Cook <keescook@...omium.org>,
        Oleg Nesterov <oleg@...hat.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Will Drewry <wad@...omium.org>, Ingo Molnar <mingo@...nel.org>,
        Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 096/127] include/stddef.h: Move offsetofend() from vfio.h to a generic kernel header

From: Denys Vlasenko <dvlasenk@...hat.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 3876488444e71238e287459c39d7692b6f718c3e upstream.

Suggested by Andy.

Suggested-by: Andy Lutomirski <luto@...capital.net>
Signed-off-by: Denys Vlasenko <dvlasenk@...hat.com>
Acked-by: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Alexei Starovoitov <ast@...mgrid.com>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Kees Cook <keescook@...omium.org>
Cc: Oleg Nesterov <oleg@...hat.com>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Will Drewry <wad@...omium.org>
Link: http://lkml.kernel.org/r/1425912738-559-1-git-send-email-dvlasenk@redhat.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 include/linux/stddef.h |  9 +++++++++
 include/linux/vfio.h   | 13 -------------
 2 files changed, 9 insertions(+), 13 deletions(-)

diff --git a/include/linux/stddef.h b/include/linux/stddef.h
index f4aec0e75c3a..076af437284d 100644
--- a/include/linux/stddef.h
+++ b/include/linux/stddef.h
@@ -19,3 +19,12 @@ enum {
 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
 #endif
 #endif
+
+/**
+ * offsetofend(TYPE, MEMBER)
+ *
+ * @TYPE: The type of the structure
+ * @MEMBER: The member within the structure to get the end offset of
+ */
+#define offsetofend(TYPE, MEMBER) \
+	(offsetof(TYPE, MEMBER)	+ sizeof(((TYPE *)0)->MEMBER))
diff --git a/include/linux/vfio.h b/include/linux/vfio.h
index 43f6bf4f8585..9131a4bf5c3e 100644
--- a/include/linux/vfio.h
+++ b/include/linux/vfio.h
@@ -76,19 +76,6 @@ extern int vfio_register_iommu_driver(const struct vfio_iommu_driver_ops *ops);
 extern void vfio_unregister_iommu_driver(
 				const struct vfio_iommu_driver_ops *ops);
 
-/**
- * offsetofend(TYPE, MEMBER)
- *
- * @TYPE: The type of the structure
- * @MEMBER: The member within the structure to get the end offset of
- *
- * Simple helper macro for dealing with variable sized structures passed
- * from user space.  This allows us to easily determine if the provided
- * structure is sized to include various fields.
- */
-#define offsetofend(TYPE, MEMBER) \
-	(offsetof(TYPE, MEMBER)	+ sizeof(((TYPE *)0)->MEMBER))
-
 /*
  * External user API
  */
-- 
2.10.2