[PATCH] configurable printk buffer size

[Robert Read <rread@datarithm.net>]

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The obvious solution struck me just after the last email.  I change
the config parameter to be an order, like the argument to
get_free_pages().  How does this look?  It's not tested, but there
isn't much to it...

robert

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diff --exclude=*~ -ru linux-2.4.2-pre4/arch/i386/config.in linux-2.4.2-pre4-logbuf/arch/i386/config.in
--- linux-2.4.2-pre4/arch/i386/config.in	Mon Jan  8 13:27:56 2001
+++ linux-2.4.2-pre4-logbuf/arch/i386/config.in	Tue Feb 20 14:10:12 2001
@@ -366,4 +366,5 @@
 
 #bool 'Debug kmalloc/kfree' CONFIG_DEBUG_MALLOC
 bool 'Magic SysRq key' CONFIG_MAGIC_SYSRQ
+int 'Printk buffer size order 2**x' CONFIG_PRINTK_BUF_ORDER 14
 endmenu
diff --exclude=*~ -ru linux-2.4.2-pre4/kernel/printk.c linux-2.4.2-pre4-logbuf/kernel/printk.c
--- linux-2.4.2-pre4/kernel/printk.c	Tue Feb 20 11:56:31 2001
+++ linux-2.4.2-pre4-logbuf/kernel/printk.c	Tue Feb 20 14:10:06 2001
@@ -23,7 +23,11 @@
 
 #include <asm/uaccess.h>
 
-#define LOG_BUF_LEN	(16384)
+#ifdef CONFIG_PRINTK_BUF_LEN
+# define LOG_BUF_LEN   (2**CONFIG_PRINTK_BUF_ORDER)
+#else
+# define LOG_BUF_LEN   (16384)
+#endif   
 #define LOG_BUF_MASK	(LOG_BUF_LEN-1)
 
 static char buf[1024];