linux-kernel - [PATCH 4/4] UML - Fix build for !CONFIG

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Message-ID: <20071031195939.GA9645@c2.user-mode-linux.org>
Date:	Wed, 31 Oct 2007 15:59:39 -0400
From:	Jeff Dike <jdike@...toit.com>
To:	Andrew Morton <akpm@...l.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	uml-devel <user-mode-linux-devel@...ts.sourceforge.net>,
	Magotari <magotari@...il.com>
Subject: [PATCH 4/4] UML - Fix build for !CONFIG_PRINTK

Handle the case of CONFIG_PRINTK being disabled.  This requires a
do-nothing stub to be present in arch/um/include/user.h so that we
don't get references to printk from libc code.

Signed-off-by: Jeff Dike <jdike@...ux.intel.com>
---
 arch/um/include/user.h |   13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

Index: linux-2.6.22/arch/um/include/user.h
===================================================================
--- linux-2.6.22.orig/arch/um/include/user.h	2007-10-22 13:21:04.000000000 -0400
+++ linux-2.6.22/arch/um/include/user.h	2007-10-22 13:21:14.000000000 -0400
@@ -1,11 +1,13 @@
 /* 
- * Copyright (C) 2000 Jeff Dike (jdike@...aya.com)
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@...dtoit,linux.intel}.com)
  * Licensed under the GPL
  */
 
 #ifndef __USER_H__
 #define __USER_H__
 
+#include "uml-config.h"
+
 /*
  * The usual definition - copied here because the kernel provides its own,
  * fancier, type-safe, definition.  Using that one would require
@@ -23,8 +25,17 @@
 
 extern void panic(const char *fmt, ...)
 	__attribute__ ((format (printf, 1, 2)));
+
+#ifdef UML_CONFIG_PRINTK
 extern int printk(const char *fmt, ...)
 	__attribute__ ((format (printf, 1, 2)));
+#else
+static inline int printk(const char *fmt, ...)
+{
+	return 0;
+}
+#endif
+
 extern void schedule(void);
 extern int in_aton(char *str);
 extern int open_gdb_chan(void);
-
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