X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=init%2Fmain.c;h=e33e09df3cbc61ad11736776ef4138010df1de8e;hb=d4164973a0d93d4925b6d630782d6c5a1c44efe6;hp=313360fe1118ffd17591da27c2ba7dacb499c126;hpb=cbd8aca472134e666eee87462177f1be854ebbf8;p=profile%2Fivi%2Fkernel-adaptation-intel-automotive.git

diff --git a/init/main.c b/init/main.c
index 313360f..e33e09d 100644
--- a/init/main.c
+++ b/init/main.c
@@ -69,6 +69,7 @@
 #include <linux/slab.h>
 #include <linux/perf_event.h>
 #include <linux/file.h>
+#include <linux/ptrace.h>
 
 #include <asm/io.h>
 #include <asm/bugs.h>
@@ -441,9 +442,11 @@ void __init __weak smp_setup_processor_id(void)
 {
 }
 
+# if THREAD_SIZE >= PAGE_SIZE
 void __init __weak thread_info_cache_init(void)
 {
 }
+#endif
 
 /*
  * Set up kernel memory allocators
@@ -791,17 +794,17 @@ static void __init do_pre_smp_initcalls(void)
 		do_one_initcall(*fn);
 }
 
-static void run_init_process(const char *init_filename)
+static int run_init_process(const char *init_filename)
 {
 	argv_init[0] = init_filename;
-	kernel_execve(init_filename, argv_init, envp_init);
+	return kernel_execve(init_filename, argv_init, envp_init);
 }
 
-/* This is a non __init function. Force it to be noinline otherwise gcc
- * makes it inline to init() and it becomes part of init.text section
- */
-static noinline int init_post(void)
+static void __init kernel_init_freeable(void);
+
+static int __ref kernel_init(void *unused)
 {
+	kernel_init_freeable();
 	/* need to finish all async __init code before freeing the memory */
 	async_synchronize_full();
 	free_initmem();
@@ -813,7 +816,8 @@ static noinline int init_post(void)
 	flush_delayed_fput();
 
 	if (ramdisk_execute_command) {
-		run_init_process(ramdisk_execute_command);
+		if (!run_init_process(ramdisk_execute_command))
+			return 0;
 		printk(KERN_WARNING "Failed to execute %s\n",
 				ramdisk_execute_command);
 	}
@@ -825,20 +829,22 @@ static noinline int init_post(void)
 	 * trying to recover a really broken machine.
 	 */
 	if (execute_command) {
-		run_init_process(execute_command);
+		if (!run_init_process(execute_command))
+			return 0;
 		printk(KERN_WARNING "Failed to execute %s.  Attempting "
 					"defaults...\n", execute_command);
 	}
-	run_init_process("/sbin/init");
-	run_init_process("/etc/init");
-	run_init_process("/bin/init");
-	run_init_process("/bin/sh");
+	if (!run_init_process("/sbin/init") ||
+	    !run_init_process("/etc/init") ||
+	    !run_init_process("/bin/init") ||
+	    !run_init_process("/bin/sh"))
+		return 0;
 
 	panic("No init found.  Try passing init= option to kernel. "
 	      "See Linux Documentation/init.txt for guidance.");
 }
 
-static int __init kernel_init(void * unused)
+static void __init kernel_init_freeable(void)
 {
 	/*
 	 * Wait until kthreadd is all set-up.
@@ -893,7 +899,4 @@ static int __init kernel_init(void * unused)
 	 * we're essentially up and running. Get rid of the
 	 * initmem segments and start the user-mode stuff..
 	 */
-
-	init_post();
-	return 0;
 }