linux-kernel - Re: [Patch] fix a headers_check warning in include/linux/kernel.h

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Date:	Mon, 18 Jul 2011 18:00:57 -0400
From:	Arnaud Lacombe <lacombar@...il.com>
To:	Americo Wang <xiyou.wangcong@...il.com>,
	Michal Marek <mmarek@...e.cz>
Cc:	linux-kernel@...r.kernel.org, Arnaud Lacombe <lacombar@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Christoph Lameter <cl@...ux.com>, Mel Gorman <mgorman@...e.de>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [Patch] fix a headers_check warning in include/linux/kernel.h

Hi,

For the sake of having a patch ready. I actually did it yesterday but did not
send it then. Cc'ed to the authors of the relevant macros; __FUNCTION__ was
actually exported since ages, but I really do not see why the kernel exports
this macros...

 - Arnaud

-- 
From: Arnaud Lacombe <lacombar@...il.com>
Subject: linux/kernel.h: hide internal macros

Unexpose to userland the following macros
 - BUILD_BUG_ON.*
 - __FUNCTION__
 - NUMA_BUILD
 - COMPACTION_BUILD
 - REBUILD_DUE_TO_FTRACE_MCOUNT_RECORD

Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Rusty Russell <rusty@...tcorp.com.au>
Cc: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc: Christoph Lameter <cl@...ux.com>
Cc: Mel Gorman <mgorman@...e.de>
Cc: Steven Rostedt <rostedt@...dmis.org>
Signed-off-by: Arnaud Lacombe <lacombar@...il.com>
---
 include/linux/kernel.h |   46 +++++++++++++++++++++++-----------------------
 1 files changed, 23 insertions(+), 23 deletions(-)

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 567a6f7..9a43ad7 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -646,29 +646,6 @@ static inline void ftrace_dump(enum ftrace_dump_mode oops_dump_mode) { }
 	const typeof( ((type *)0)->member ) *__mptr = (ptr);	\
 	(type *)( (char *)__mptr - offsetof(type,member) );})
 
-struct sysinfo;
-extern int do_sysinfo(struct sysinfo *info);
-
-#endif /* __KERNEL__ */
-
-#define SI_LOAD_SHIFT	16
-struct sysinfo {
-	long uptime;			/* Seconds since boot */
-	unsigned long loads[3];		/* 1, 5, and 15 minute load averages */
-	unsigned long totalram;		/* Total usable main memory size */
-	unsigned long freeram;		/* Available memory size */
-	unsigned long sharedram;	/* Amount of shared memory */
-	unsigned long bufferram;	/* Memory used by buffers */
-	unsigned long totalswap;	/* Total swap space size */
-	unsigned long freeswap;		/* swap space still available */
-	unsigned short procs;		/* Number of current processes */
-	unsigned short pad;		/* explicit padding for m68k */
-	unsigned long totalhigh;	/* Total high memory size */
-	unsigned long freehigh;		/* Available high memory size */
-	unsigned int mem_unit;		/* Memory unit size in bytes */
-	char _f[20-2*sizeof(long)-sizeof(int)];	/* Padding: libc5 uses this.. */
-};
-
 #ifdef __CHECKER__
 #define BUILD_BUG_ON_NOT_POWER_OF_2(n)
 #define BUILD_BUG_ON_ZERO(e) (0)
@@ -736,4 +713,27 @@ extern int __build_bug_on_failed;
 # define REBUILD_DUE_TO_FTRACE_MCOUNT_RECORD
 #endif
 
+struct sysinfo;
+extern int do_sysinfo(struct sysinfo *info);
+
+#endif /* __KERNEL__ */
+
+#define SI_LOAD_SHIFT	16
+struct sysinfo {
+	long uptime;			/* Seconds since boot */
+	unsigned long loads[3];		/* 1, 5, and 15 minute load averages */
+	unsigned long totalram;		/* Total usable main memory size */
+	unsigned long freeram;		/* Available memory size */
+	unsigned long sharedram;	/* Amount of shared memory */
+	unsigned long bufferram;	/* Memory used by buffers */
+	unsigned long totalswap;	/* Total swap space size */
+	unsigned long freeswap;		/* swap space still available */
+	unsigned short procs;		/* Number of current processes */
+	unsigned short pad;		/* explicit padding for m68k */
+	unsigned long totalhigh;	/* Total high memory size */
+	unsigned long freehigh;		/* Available high memory size */
+	unsigned int mem_unit;		/* Memory unit size in bytes */
+	char _f[20-2*sizeof(long)-sizeof(int)];	/* Padding: libc5 uses this.. */
+};
+
 #endif
-- 
1.7.6.153.g78432

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