Merge branch 'linux-linaro-lsk-v4.4' into linux-linaro-lsk-v4.4-android

[firefly-linux-kernel-4.4.55.git] / init / main.c

diff --git a/init/main.c b/init/main.c
index 56506553d4d80dff814b75f45db6db280fd0dea7..fbafa271531cb417a60bb1366baacc04f2e81880 100644 (file)
--- a/init/main.c
+++ b/init/main.c
@@ -93,9 +93,6 @@ static int kernel_init(void *);
 extern void init_IRQ(void);
 extern void fork_init(void);
 extern void radix_tree_init(void);
-#ifndef CONFIG_DEBUG_RODATA
-static inline void mark_rodata_ro(void) { }
-#endif
 
 /*
  * Debug helper: via this flag we know that we are in 'early bootup code'
@@ -877,7 +874,6 @@ static void __init do_initcalls(void)
 static void __init do_basic_setup(void)
 {
        cpuset_init_smp();
-       usermodehelper_init();
        shmem_init();
        driver_init();
        init_irq_proc();
@@ -930,6 +926,28 @@ static int try_to_run_init_process(const char *init_filename)
 
 static noinline void __init kernel_init_freeable(void);
 
+#ifdef CONFIG_DEBUG_RODATA
+static bool rodata_enabled = true;
+static int __init set_debug_rodata(char *str)
+{
+       return strtobool(str, &rodata_enabled);
+}
+__setup("rodata=", set_debug_rodata);
+
+static void mark_readonly(void)
+{
+       if (rodata_enabled)
+               mark_rodata_ro();
+       else
+               pr_info("Kernel memory protection disabled.\n");
+}
+#else
+static inline void mark_readonly(void)
+{
+       pr_warn("This architecture does not have kernel memory protection.\n");
+}
+#endif
+
 static int __ref kernel_init(void *unused)
 {
        int ret;
@@ -938,7 +956,7 @@ static int __ref kernel_init(void *unused)
        /* need to finish all async __init code before freeing the memory */
        async_synchronize_full();
        free_initmem();
-       mark_rodata_ro();
+       mark_readonly();
        system_state = SYSTEM_RUNNING;
        numa_default_policy();