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>

diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 89853bc..3edb114 100644 (file)
--- 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 0e06c17..9f70c9f 100644 (file)
--- 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)))))        \

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 161b784..94e71ef 100644 (file)
--- 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 },