patch for 2.4.0 disable printk

@@ -12139,6 +12179,14 @@
 
   If unsure, say Y, or else you won't be able to do much with your new
   shiny Linux system :-)
+
+Disable kernel messages
+CONFIG_PRINTK
+  This option allows you to disable all kernel messages by overriding
+  the printk function with an empty macro.
+  On small embedded systems, this save a lot of rom and ram space. On
+  server or desktop systems you want human readable outputs, so it is
+  normaly the best choice to say N to this option.
 
 Support for console on virtual terminal
 CONFIG_VT_CONSOLE

@@ -4,6 +4,7 @@
 mainmenu_option next_comment
 comment 'Character devices'
 
+bool 'Disable kernel messages' CONFIG_PRINTK
 bool 'Virtual terminal' CONFIG_VT
 if [ "$CONFIG_VT" = "y" ]; then
    bool '  Support for console on virtual terminal' CONFIG_VT_CONSOLE

@@ -5,8 +5,10 @@
 #include <asm/rwlock.h>
 #include <asm/page.h>
 
+#ifndef CONFIG_PRINTK
 extern int printk(const char * fmt, ...)
        __attribute__ ((format (printf, 1, 2)));
+#endif
 
 /* It seems that people are forgetting to
  * initialize their spinlocks properly, tsk tsk.

@@ -68,8 +68,13 @@
 
 extern int session_of_pgrp(int pgrp);
 
+#ifdef CONFIG_PRINTK
+#define        printk(x...)    ((void)0)
+#else
 asmlinkage int printk(const char * fmt, ...)
        __attribute__ ((format (printf, 1, 2)));
+#endif
+
 
 extern int console_loglevel;
 

@@ -439,7 +440,9 @@
 
 /* misc */
 EXPORT_SYMBOL(panic);
+#ifndef CONFIG_PRINTK
 EXPORT_SYMBOL(printk);
+#endif
 EXPORT_SYMBOL(sprintf);
 EXPORT_SYMBOL(vsprintf);
 EXPORT_SYMBOL(kdevname);

@@ -25,7 +25,9 @@
 #define LOG_BUF_LEN    (16384)
 #define LOG_BUF_MASK   (LOG_BUF_LEN-1)
 
+#ifndef CONFIG_PRINTK
 static char buf[1024];
+#endif
 
 /* printk's without a loglevel use this.. */
 #define DEFAULT_MESSAGE_LOGLEVEL 4 /* KERN_WARNING */

@@ -251,6 +253,20 @@
        return do_syslog(type, buf, len);
 }
 
+
+#ifdef CONFIG_PRINTK
+#undef printk
+
+#include <linux/module.h>
+
+asmlinkage int printk(const char *fmt, ...)
+{
+       return 0;
+}
+
+EXPORT_SYMBOL_NOVERS(printk);
+
+#else
 asmlinkage int printk(const char *fmt, ...)
 {
        va_list args;

@@ -311,6 +322,7 @@
        wake_up_interruptible(&log_wait);
        return i;
 }
+#endif
 
 void console_print(const char *s)
 {

diff -u --recursive --new-file linux/CREDITS linux.noprintk/CREDITS
@@ -2395,6 +2395,14 @@
 S: Oldenburg
 S: Germany
 
+N: Stefani Seibold
+E: [email protected]
+D: Possibility to disable all kernel messages by overload printk with a
+D: dummy macro (saves a lot of disk- and ramspace for embedded systems
+D: and rescue disks)
+S: Munich
+S: Germany
+
 N: Darren Senn
 E: [email protected]
 D: Whatever I notice needs doing (so far: itimers, /proc)