linux-kernel - [PATCH 8/8] Use __kernel_long_t in struct mq

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Message-Id: <1388165112-6545-9-git-send-email-hjl.tools@gmail.com>
Date:	Fri, 27 Dec 2013 09:25:12 -0800
From:	"H.J. Lu" <hjl.tools@...il.com>
To:	"H. Peter Anvin" <hpa@...or.com>,
	LKML <linux-kernel@...r.kernel.org>
Cc:	"H.J. Lu" <hjl.tools@...il.com>
Subject: [PATCH 8/8] Use __kernel_long_t in struct mq_attr

Both x32 and x86-64 use the same struct mq_attr for system calls.  But
x32 long is 32-bit. This patch replaces long with __kernel_long_t in
struct mq_attr if __BITS_PER_LONG == 64.

Signed-off-by: H.J. Lu <hjl.tools@...il.com>
---
 include/uapi/linux/mqueue.h | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/include/uapi/linux/mqueue.h b/include/uapi/linux/mqueue.h
index 8b5a796..03bf30e 100644
--- a/include/uapi/linux/mqueue.h
+++ b/include/uapi/linux/mqueue.h
@@ -23,11 +23,19 @@
 #define MQ_BYTES_MAX	819200
 
 struct mq_attr {
-	long	mq_flags;	/* message queue flags			*/
-	long	mq_maxmsg;	/* maximum number of messages		*/
-	long	mq_msgsize;	/* maximum message size			*/
-	long	mq_curmsgs;	/* number of messages currently queued	*/
-	long	__reserved[4];	/* ignored for input, zeroed for output */
+#if __BITS_PER_LONG == 64
+	__kernel_long_t	mq_flags;	/* message queue flags			*/
+	__kernel_long_t	mq_maxmsg;	/* maximum number of messages		*/
+	__kernel_long_t	mq_msgsize;	/* maximum message size			*/
+	__kernel_long_t	mq_curmsgs;	/* number of messages currently queued	*/
+	__kernel_long_t	__reserved[4];	/* ignored for input, zeroed for output */
+#else
+	long	mq_flags;		/* message queue flags			*/
+	long	mq_maxmsg;		/* maximum number of messages		*/
+	long	mq_msgsize;		/* maximum message size			*/
+	long	mq_curmsgs;		/* number of messages currently queued	*/
+	long	__reserved[4];		/* ignored for input, zeroed for output */
+#endif
 };
 
 /*
-- 
1.8.4.2

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