From f19969c6550ffc869cd6f8577ab5c459ae742ae6 Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@elte.hu>
Date: Fri, 3 Jul 2009 08:30:13 -0500
Subject: [PATCH] init: show enabled debugs

commit d0cd6d95886e800ac64e1467b6ec262a7d8782fd in tip.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

diff --git a/init/main.c b/init/main.c
index 650c1ce..2a09cb6 100644
--- a/init/main.c
+++ b/init/main.c
@@ -413,6 +413,8 @@ static noinline void __init_refok rest_init(void)
 {
 	int pid;
 
+	system_state = SYSTEM_BOOTING_SCHEDULER_OK;
+
 	rcu_scheduler_starting();
 	kernel_thread(kernel_init, NULL, CLONE_FS | CLONE_SIGHAND);
 	numa_default_policy();
@@ -678,6 +680,9 @@ asmlinkage void __init start_kernel(void)
 
 	ftrace_init();
 
+#ifdef CONFIG_PREEMPT_RT
+	WARN_ON(irqs_disabled());
+#endif
 	/* Do the rest non-__init'ed, we're now alive */
 	rest_init();
 }
@@ -781,9 +786,11 @@ static void __init do_basic_setup(void)
 static void __init do_pre_smp_initcalls(void)
 {
 	initcall_t *fn;
+	extern int spawn_desched_task(void);
 
 	for (fn = __initcall_start; fn < __early_initcall_end; fn++)
 		do_one_initcall(*fn);
+	spawn_desched_task();
 }
 
 static void run_init_process(char *init_filename)
@@ -819,6 +826,9 @@ static noinline int init_post(void)
 		printk(KERN_WARNING "Failed to execute %s\n",
 				ramdisk_execute_command);
 	}
+#ifdef CONFIG_PREEMPT_RT
+	WARN_ON(irqs_disabled());
+#endif
 
 	/*
 	 * We try each of these until one succeeds.
@@ -885,7 +895,51 @@ static int __init kernel_init(void * unused)
 		ramdisk_execute_command = NULL;
 		prepare_namespace();
 	}
+#ifdef CONFIG_PREEMPT_RT
+	WARN_ON(irqs_disabled());
+#endif
+
+#define DEBUG_COUNT (defined(CONFIG_DEBUG_RT_MUTEXES) + defined(CONFIG_CRITICAL_PREEMPT_TIMING) + defined(CONFIG_CRITICAL_IRQSOFF_TIMING) + defined(CONFIG_FUNCTION_TRACE) + defined(CONFIG_DEBUG_SLAB) + defined(CONFIG_DEBUG_PAGEALLOC) + defined(CONFIG_LOCKDEP))
 
+#if DEBUG_COUNT > 0
+	printk(KERN_ERR "*****************************************************************************\n");
+	printk(KERN_ERR "*                                                                           *\n");
+#if DEBUG_COUNT == 1
+	printk(KERN_ERR "*  REMINDER, the following debugging option is turned on in your .config:   *\n");
+#else
+	printk(KERN_ERR "*  REMINDER, the following debugging options are turned on in your .config: *\n");
+#endif
+	printk(KERN_ERR "*                                                                           *\n");
+#ifdef CONFIG_DEBUG_RT_MUTEXES
+	printk(KERN_ERR "*        CONFIG_DEBUG_RT_MUTEXES                                            *\n");
+#endif
+#ifdef CONFIG_CRITICAL_PREEMPT_TIMING
+	printk(KERN_ERR "*        CONFIG_CRITICAL_PREEMPT_TIMING                                     *\n");
+#endif
+#ifdef CONFIG_CRITICAL_IRQSOFF_TIMING
+	printk(KERN_ERR "*        CONFIG_CRITICAL_IRQSOFF_TIMING                                     *\n");
+#endif
+#ifdef CONFIG_FUNCTION_TRACE
+	printk(KERN_ERR "*        CONFIG_FUNCTION_TRACE                                              *\n");
+#endif
+#ifdef CONFIG_DEBUG_SLAB
+	printk(KERN_ERR "*        CONFIG_DEBUG_SLAB                                                  *\n");
+#endif
+#ifdef CONFIG_DEBUG_PAGEALLOC
+	printk(KERN_ERR "*        CONFIG_DEBUG_PAGEALLOC                                             *\n");
+#endif
+#ifdef CONFIG_LOCKDEP
+	printk(KERN_ERR "*        CONFIG_LOCKDEP                                                     *\n");
+#endif
+	printk(KERN_ERR "*                                                                           *\n");
+#if DEBUG_COUNT == 1
+	printk(KERN_ERR "*  it may increase runtime overhead and latencies.                          *\n");
+#else
+	printk(KERN_ERR "*  they may increase runtime overhead and latencies.                        *\n");
+#endif
+	printk(KERN_ERR "*                                                                           *\n");
+	printk(KERN_ERR "*****************************************************************************\n");
+#endif
 	/*
 	 * Ok, we have completed the initial bootup, and
 	 * we're essentially up and running. Get rid of the
-- 
1.7.1.1