linux-kernel - [PATCH] x86_64 built-in command line

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Message-ID: <20060731171442.GI6908@waste.org>
Date:	Mon, 31 Jul 2006 12:14:42 -0500
From:	Matt Mackall <mpm@...enic.com>
To:	linux-kernel <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...l.org>, ak@...e.de
Subject: [PATCH] x86_64 built-in command line

Allow setting a command line at build time on x86_64. Compiled but not
tested.

Signed-off-by: Matt Mackall <mpm@...enic.com>

Index: linux/arch/x86_64/Kconfig
===================================================================
--- linux.orig/arch/x86_64/Kconfig	2006-07-26 18:08:29.000000000 -0500
+++ linux/arch/x86_64/Kconfig	2006-07-27 17:19:50.000000000 -0500
@@ -558,6 +558,20 @@ config K8_NB
 	def_bool y
 	depends on AGP_AMD64 || IOMMU || (PCI && NUMA)
 
+config CMDLINE_BOOL
+	bool "Default bootloader kernel arguments" if EMBEDDED
+
+config CMDLINE
+	string "Initial kernel command string" if EMBEDDED
+	depends on CMDLINE_BOOL
+	default "root=/dev/hda1 ro"
+	help
+	  On some systems, there is no way for the boot loader to pass
+	  arguments to the kernel. For these platforms, you can supply
+	  some command-line options at build time by entering them
+	  here. In most cases you will need to specify the root device
+	  here.
+
 endmenu
 
 #
Index: linux/arch/x86_64/kernel/setup.c
===================================================================
--- linux.orig/arch/x86_64/kernel/setup.c	2006-07-26 18:08:29.000000000 -0500
+++ linux/arch/x86_64/kernel/setup.c	2006-07-27 17:26:51.000000000 -0500
@@ -289,6 +289,10 @@ static __init void parse_cmdline_early (
 	int len = 0;
 	int userdef = 0;
 
+#ifdef CONFIG_CMDLINE_BOOL
+	strlcpy(saved_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
+#endif
+
 	for (;;) {
 		if (c != ' ') 
 			goto next_char; 

-- 
Mathematics is the supreme nostalgia of our time.
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