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>

1 files changed, 38 insertions, 10 deletions

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 161b7846733e..94e71efb2c14 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -763,6 +763,8 @@ static void check_section(const char *modname, struct elf_info *elf,
 
 
 #define ALL_INIT_DATA_SECTIONS \
+        ".init.setup$", ".init.rodata$", \
+        ".devinit.rodata$", ".cpuinit.rodata$", ".meminit.rodata$" \
         ".init.data$", ".devinit.data$", ".cpuinit.data$", ".meminit.data$"
 #define ALL_EXIT_DATA_SECTIONS \
         ".exit.data$", ".devexit.data$", ".cpuexit.data$", ".memexit.data$"
@@ -772,21 +774,23 @@ static void check_section(const char *modname, struct elf_info *elf,
 #define ALL_EXIT_TEXT_SECTIONS \
         ".exit.text$", ".devexit.text$", ".cpuexit.text$", ".memexit.text$"
 
-#define ALL_INIT_SECTIONS ALL_INIT_DATA_SECTIONS, ALL_INIT_TEXT_SECTIONS
-#define ALL_EXIT_SECTIONS ALL_EXIT_DATA_SECTIONS, ALL_EXIT_TEXT_SECTIONS
+#define ALL_INIT_SECTIONS INIT_SECTIONS, DEV_INIT_SECTIONS, \
+        CPU_INIT_SECTIONS, MEM_INIT_SECTIONS
+#define ALL_EXIT_SECTIONS EXIT_SECTIONS, DEV_EXIT_SECTIONS, \
+        CPU_EXIT_SECTIONS, MEM_EXIT_SECTIONS
 
 #define DATA_SECTIONS ".data$", ".data.rel$"
 #define TEXT_SECTIONS ".text$"
 
-#define INIT_SECTIONS      ".init.data$", ".init.text$"
-#define DEV_INIT_SECTIONS  ".devinit.data$", ".devinit.text$"
-#define CPU_INIT_SECTIONS  ".cpuinit.data$", ".cpuinit.text$"
-#define MEM_INIT_SECTIONS  ".meminit.data$", ".meminit.text$"
+#define INIT_SECTIONS      ".init.*"
+#define DEV_INIT_SECTIONS  ".devinit.*"
+#define CPU_INIT_SECTIONS  ".cpuinit.*"
+#define MEM_INIT_SECTIONS  ".meminit.*"
 
-#define EXIT_SECTIONS      ".exit.data$", ".exit.text$"
-#define DEV_EXIT_SECTIONS  ".devexit.data$", ".devexit.text$"
-#define CPU_EXIT_SECTIONS  ".cpuexit.data$", ".cpuexit.text$"
-#define MEM_EXIT_SECTIONS  ".memexit.data$", ".memexit.text$"
+#define EXIT_SECTIONS      ".exit.*"
+#define DEV_EXIT_SECTIONS  ".devexit.*"
+#define CPU_EXIT_SECTIONS  ".cpuexit.*"
+#define MEM_EXIT_SECTIONS  ".memexit.*"
 
 /* init data sections */
 static const char *init_data_sections[] = { ALL_INIT_DATA_SECTIONS, NULL };
@@ -869,12 +873,36 @@ const struct sectioncheck sectioncheck[] = {
         .tosec   = { INIT_SECTIONS, NULL },
         .mismatch = XXXINIT_TO_INIT,
 },
+/* Do not reference cpuinit code/data from meminit code/data */
+{
+        .fromsec = { MEM_INIT_SECTIONS, NULL },
+        .tosec   = { CPU_INIT_SECTIONS, NULL },
+        .mismatch = XXXINIT_TO_INIT,
+},
+/* Do not reference meminit code/data from cpuinit code/data */
+{
+        .fromsec = { CPU_INIT_SECTIONS, NULL },
+        .tosec   = { MEM_INIT_SECTIONS, NULL },
+        .mismatch = XXXINIT_TO_INIT,
+},
 /* Do not reference exit code/data from devexit/cpuexit/memexit code/data */
 {
         .fromsec = { DEV_EXIT_SECTIONS, CPU_EXIT_SECTIONS, MEM_EXIT_SECTIONS, NULL },
         .tosec   = { EXIT_SECTIONS, NULL },
         .mismatch = XXXEXIT_TO_EXIT,
 },
+/* Do not reference cpuexit code/data from memexit code/data */
+{
+        .fromsec = { MEM_EXIT_SECTIONS, NULL },
+        .tosec   = { CPU_EXIT_SECTIONS, NULL },
+        .mismatch = XXXEXIT_TO_EXIT,
+},
+/* Do not reference memexit code/data from cpuexit code/data */
+{
+        .fromsec = { CPU_EXIT_SECTIONS, NULL },
+        .tosec   = { MEM_EXIT_SECTIONS, NULL },
+        .mismatch = XXXEXIT_TO_EXIT,
+},
 /* Do not use exit code/data from init code */
 {
         .fromsec = { ALL_INIT_SECTIONS, NULL },