__init poisoning for i386, too

[Pavel Machek <pavel@ucw.cz>]

Hi!

Overwrite __init section so calls to __init functions from normal code
are catched, reliably. I wonder if this should be configurable... but
it is configurable on x86-64 so I copied it. Please apply,

								Pavel

--- tmp/linux/arch/i386/Kconfig.debug	2004-10-01 00:29:59.000000000 +0200
+++ linux/arch/i386/Kconfig.debug	2004-10-07 00:11:09.000000000 +0200
@@ -15,6 +15,13 @@
 	  with klogd/syslogd or the X server. You should normally N here,
 	  unless you want to debug such a crash.
 
+config INIT_DEBUG
+	bool "Debug __init statements"
+	depends on DEBUG_KERNEL
+	help
+	  Fill __init and __initdata at the end of boot. This helps debugging
+	  illegal uses of __init and __initdata after initialization.
+
 config DEBUG_STACKOVERFLOW
 	bool "Check for stack overflows"
 	depends on DEBUG_KERNEL
--- tmp/linux/arch/i386/mm/init.c	2004-10-01 00:29:59.000000000 +0200
+++ linux/arch/i386/mm/init.c	2004-10-07 00:09:04.000000000 +0200
@@ -705,6 +705,9 @@
 		ClearPageReserved(virt_to_page(addr));
 		set_page_count(virt_to_page(addr), 1);
 		free_page(addr);
+#ifdef CONFIG_INIT_DEBUG
+		memset((void *)(addr & ~(PAGE_SIZE-1)), 0xcc, PAGE_SIZE); 
+#endif
 		totalram_pages++;
 	}
 	printk (KERN_INFO "Freeing unused kernel memory: %dk freed\n", (__init_end - __init_begin) >> 10);

-- 
People were complaining that M$ turns users into beta-testers...
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