linux-kernel - [PATCH 3.2 069/140] include/stddef.h: Move offsetofend() from vfio.h to a generic kernel header

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Message-ID: <lsq.1519831222.933053267@decadent.org.uk>
Date:   Wed, 28 Feb 2018 15:20:22 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, "Steven Rostedt" <rostedt@...dmis.org>,
        "Borislav Petkov" <bp@...en8.de>,
        "Andy Lutomirski" <luto@...capital.net>,
        "Linus Torvalds" <torvalds@...ux-foundation.org>,
        "Oleg Nesterov" <oleg@...hat.com>,
        "Will Drewry" <wad@...omium.org>,
        "Denys Vlasenko" <dvlasenk@...hat.com>,
        "Kees Cook" <keescook@...omium.org>,
        "Frederic Weisbecker" <fweisbec@...il.com>,
        "H. Peter Anvin" <hpa@...or.com>, "Ingo Molnar" <mingo@...nel.org>,
        "Alexei Starovoitov" <ast@...mgrid.com>
Subject: [PATCH 3.2 069/140] include/stddef.h: Move offsetofend() from
 vfio.h to a generic kernel header

3.2.100-rc1 review patch.  If anyone has any objections, please let me know.

------------------

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

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>
[bwh: Backported to 3.2:
 - There is no definition in vfio.h to move
 - Put the definition inside the #ifdef __KERNEL__ section]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
--- a/include/linux/stddef.h
+++ b/include/linux/stddef.h
@@ -23,6 +23,16 @@ enum {
 #else
 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
 #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))
+
 #endif /* __KERNEL__ */
 
 #endif