Merge 4.4.110 into android-4.4

[sagit-ice-cold/kernel_xiaomi_msm8998.git] / init / main.c

diff --git a/init/main.c b/init/main.c
index 0cc5c4b..db6b6cb 100644 (file)
--- a/init/main.c
+++ b/init/main.c
@@ -81,24 +81,19 @@
 #include <linux/integrity.h>
 #include <linux/proc_ns.h>
 #include <linux/io.h>
+#include <linux/kaiser.h>
 
 #include <asm/io.h>
 #include <asm/bugs.h>
 #include <asm/setup.h>
 #include <asm/sections.h>
 #include <asm/cacheflush.h>
-#ifdef CONFIG_KAISER
-#include <asm/kaiser.h>
-#endif
 
 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'
@@ -474,7 +469,7 @@ void __init __weak smp_setup_processor_id(void)
 }
 
 # if THREAD_SIZE >= PAGE_SIZE
-void __init __weak thread_info_cache_init(void)
+void __init __weak thread_stack_cache_init(void)
 {
 }
 #endif
@@ -495,9 +490,7 @@ static void __init mm_init(void)
        pgtable_init();
        vmalloc_init();
        ioremap_huge_init();
-#ifdef CONFIG_KAISER
        kaiser_init();
-#endif
 }
 
 asmlinkage __visible void __init start_kernel(void)
@@ -654,7 +647,7 @@ asmlinkage __visible void __init start_kernel(void)
        /* Should be run before the first non-init thread is created */
        init_espfix_bsp();
 #endif
-       thread_info_cache_init();
+       thread_stack_cache_init();
        cred_init();
        fork_init();
        proc_caches_init();
@@ -935,6 +928,28 @@ 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;
@@ -943,7 +958,7 @@ 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();