[PATCH 1/3] init: Declare rodata_enabled and mark_rodata_ro() at all time

[Christophe Leroy]

Declaring rodata_enabled and mark_rodata_ro() at all time
helps removing related #ifdefery in C files.

Signed-off-by: Christophe Leroy <christophe.le...@csgroup.eu>
---
 include/linux/init.h |  4 ----
 init/main.c          | 21 +++++++--------------
 2 files changed, 7 insertions(+), 18 deletions(-)

diff --git a/include/linux/init.h b/include/linux/init.h
index 01b52c9c7526..d2b47be38a07 100644
--- a/include/linux/init.h
+++ b/include/linux/init.h
@@ -168,12 +168,8 @@ extern initcall_entry_t __initcall_end[];
 
 extern struct file_system_type rootfs_fs_type;
 
-#if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_STRICT_MODULE_RWX)
 extern bool rodata_enabled;
-#endif
-#ifdef CONFIG_STRICT_KERNEL_RWX
 void mark_rodata_ro(void);
-#endif
 
 extern void (*late_time_init)(void);
 
diff --git a/init/main.c b/init/main.c
index e24b0780fdff..807df08c501f 100644
--- a/init/main.c
+++ b/init/main.c
@@ -1396,10 +1396,9 @@ static int __init set_debug_rodata(char *str)
 early_param("rodata", set_debug_rodata);
 #endif
 
-#ifdef CONFIG_STRICT_KERNEL_RWX
 static void mark_readonly(void)
 {
-       if (rodata_enabled) {
+       if (IS_ENABLED(CONFIG_STRICT_KERNEL_RWX) && rodata_enabled) {
                /*
                 * load_module() results in W+X mappings, which are cleaned
                 * up with call_rcu().  Let's make sure that queued work is
@@ -1409,20 +1408,14 @@ static void mark_readonly(void)
                rcu_barrier();
                mark_rodata_ro();
                rodata_test();
-       } else
+       } else if (IS_ENABLED(CONFIG_STRICT_KERNEL_RWX)) {
                pr_info("Kernel memory protection disabled.\n");
+       } else if (IS_ENABLED(CONFIG_ARCH_HAS_STRICT_KERNEL_RWX)) {
+               pr_warn("Kernel memory protection not selected by kernel 
config.\n");
+       } else {
+               pr_warn("This architecture does not have kernel memory 
protection.\n");
+       }
 }
-#elif defined(CONFIG_ARCH_HAS_STRICT_KERNEL_RWX)
-static inline void mark_readonly(void)
-{
-       pr_warn("Kernel memory protection not selected by kernel config.\n");
-}
-#else
-static inline void mark_readonly(void)
-{
-       pr_warn("This architecture does not have kernel memory protection.\n");
-}
-#endif
 
 void __weak free_initmem(void)
 {
-- 
2.41.0