initconst adjustments

- add .init.rodata to INIT_DATA, and group all initconst flavors
  together
- move strings generated from __setup_param() into .init.rodata
- add .*init.rodata to modpost's sets of init sections
- make modpost warn about references between meminit and cpuinit
  as well as memexit and cpuexit sections (as CPU and memory
  hotplug are independently selectable features)

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

2 files changed, 5 insertions, 3 deletions

diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 89853bcd27a..3edb1149974 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -336,10 +336,11 @@
 #define INIT_DATA                                                       \
         *(.init.data)                                                   \
         DEV_DISCARD(init.data)                                          \
-        DEV_DISCARD(init.rodata)                                        \
         CPU_DISCARD(init.data)                                          \
-        CPU_DISCARD(init.rodata)                                        \
         MEM_DISCARD(init.data)                                          \
+        *(.init.rodata)                                                 \
+        DEV_DISCARD(init.rodata)                                        \
+        CPU_DISCARD(init.rodata)                                        \
         MEM_DISCARD(init.rodata)
 
 #define INIT_TEXT                                                       \
diff --git a/include/linux/init.h b/include/linux/init.h
index 0e06c176f18..9f70c9f25d4 100644
--- a/include/linux/init.h
+++ b/include/linux/init.h
@@ -225,7 +225,8 @@ struct obs_kernel_param {
  * obs_kernel_param "array" too far apart in .init.setup.
  */
 #define __setup_param(str, unique_id, fn, early)                        \
-        static char __setup_str_##unique_id[] __initdata __aligned(1) = str; \
+        static const char __setup_str_##unique_id[] __initconst \
+                __aligned(1) = str; \
         static struct obs_kernel_param __setup_##unique_id      \
                 __used __section(.init.setup)                   \
                 __attribute__((aligned((sizeof(long)))))        \