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initconst adjustments

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- 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>
This commit is contained in:
Jan Beulich 2009-03-12 10:58:33 +00:00 committed by Sam Ravnborg
parent 6d9923219c
commit fd6c3a8dc4
3 changed files with 43 additions and 13 deletions
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5
include/asm-generic/vmlinux.lds.h
View file

@ -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 \

3
include/linux/init.h
View file

@ -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))))) \

48
scripts/mod/modpost.c
View file

@ -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 },