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x86: misc. constifications 

Miscellaneous x86 stuff that can live in .rodata.

[ tglx: arch/x86 adaptation ]

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Jan Beulich 2007-10-17 18:04:37 +02:00 committed by Thomas Gleixner
parent df5ddf620e
commit 121d7bf5a2
7 changed files with 31 additions and 26 deletions
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30
arch/x86/kernel/alternative.c
View File

@ -63,11 +63,11 @@ __setup("noreplace-paravirt", setup_noreplace_paravirt);
/* Use inline assembly to define this because the nops are defined
as inline assembly strings in the include files and we cannot
get them easily into strings. */
asm("\t.data\nintelnops: "
asm("\t.section .rodata, \"a\"\nintelnops: "
GENERIC_NOP1 GENERIC_NOP2 GENERIC_NOP3 GENERIC_NOP4 GENERIC_NOP5 GENERIC_NOP6
GENERIC_NOP7 GENERIC_NOP8);
extern unsigned char intelnops[];
static unsigned char *intel_nops[ASM_NOP_MAX+1] = {
extern const unsigned char intelnops[];
static const unsigned char *const intel_nops[ASM_NOP_MAX+1] = {
NULL,
intelnops,
intelnops + 1,
@ -81,11 +81,11 @@ static unsigned char *intel_nops[ASM_NOP_MAX+1] = {
#endif
#ifdef K8_NOP1
asm("\t.data\nk8nops: "
asm("\t.section .rodata, \"a\"\nk8nops: "
K8_NOP1 K8_NOP2 K8_NOP3 K8_NOP4 K8_NOP5 K8_NOP6
K8_NOP7 K8_NOP8);
extern unsigned char k8nops[];
static unsigned char *k8_nops[ASM_NOP_MAX+1] = {
extern const unsigned char k8nops[];
static const unsigned char *const k8_nops[ASM_NOP_MAX+1] = {
NULL,
k8nops,
k8nops + 1,
@ -99,11 +99,11 @@ static unsigned char *k8_nops[ASM_NOP_MAX+1] = {
#endif
#ifdef K7_NOP1
asm("\t.data\nk7nops: "
asm("\t.section .rodata, \"a\"\nk7nops: "
K7_NOP1 K7_NOP2 K7_NOP3 K7_NOP4 K7_NOP5 K7_NOP6
K7_NOP7 K7_NOP8);
extern unsigned char k7nops[];
static unsigned char *k7_nops[ASM_NOP_MAX+1] = {
extern const unsigned char k7nops[];
static const unsigned char *const k7_nops[ASM_NOP_MAX+1] = {
NULL,
k7nops,
k7nops + 1,
@ -119,25 +119,25 @@ static unsigned char *k7_nops[ASM_NOP_MAX+1] = {
#ifdef CONFIG_X86_64
extern char __vsyscall_0;
static inline unsigned char** find_nop_table(void)
static inline const unsigned char*const * find_nop_table(void)
{
return k8_nops;
}
#else /* CONFIG_X86_64 */
static struct nop {
static const struct nop {
int cpuid;
unsigned char **noptable;
const unsigned char *const *noptable;
} noptypes[] = {
{ X86_FEATURE_K8, k8_nops },
{ X86_FEATURE_K7, k7_nops },
{ -1, NULL }
};
static unsigned char** find_nop_table(void)
static const unsigned char*const * find_nop_table(void)
{
unsigned char **noptable = intel_nops;
const unsigned char *const *noptable = intel_nops;
int i;
for (i = 0; noptypes[i].cpuid >= 0; i++) {
@ -154,7 +154,7 @@ static unsigned char** find_nop_table(void)
/* Use this to add nops to a buffer, then text_poke the whole buffer. */
static void add_nops(void *insns, unsigned int len)
{
unsigned char **noptable = find_nop_table();
const unsigned char *const *noptable = find_nop_table();
while (len > 0) {
unsigned int noplen = len;

4
arch/x86/kernel/setup_64.c
View File

@ -968,7 +968,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
* applications want to get the raw CPUID data, they should access
* /dev/cpu/<cpu_nr>/cpuid instead.
*/
static char *x86_cap_flags[] = {
static const char *const x86_cap_flags[] = {
/* Intel-defined */
"fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce",
"cx8", "apic", NULL, "sep", "mtrr", "pge", "mca", "cmov",
@ -1022,7 +1022,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
};
static char *x86_power_flags[] = {
static const char *const x86_power_flags[] = {
"ts", /* temperature sensor */
"fid", /* frequency id control */
"vid", /* voltage id control */

4
arch/x86/kernel/smpboot_32.c
View File

@ -102,8 +102,8 @@ u8 apicid_2_node[MAX_APICID];
* Trampoline 80x86 program as an array.
*/
extern unsigned char trampoline_data [];
extern unsigned char trampoline_end [];
extern const unsigned char trampoline_data [];
extern const unsigned char trampoline_end [];
static unsigned char *trampoline_base;
static int trampoline_exec;

4
arch/x86/kernel/smpboot_64.c
View File

@ -102,8 +102,8 @@ EXPORT_PER_CPU_SYMBOL(cpu_core_map);
* Trampoline 80x86 program as an array.
*/
extern unsigned char trampoline_data[];
extern unsigned char trampoline_end[];
extern const unsigned char trampoline_data[];
extern const unsigned char trampoline_end[];
/* State of each CPU */
DEFINE_PER_CPU(int, cpu_state) = { 0 };

4
arch/x86/kernel/trampoline_32.S
View File

@ -36,11 +36,11 @@
#include <asm/segment.h>
#include <asm/page.h>
.data
/* We can free up trampoline after bootup if cpu hotplug is not supported. */
#ifndef CONFIG_HOTPLUG_CPU
.section ".init.data","aw",@progbits
#else
.section .rodata,"a",@progbits
#endif
.code16

7
arch/x86/kernel/trampoline_64.S
View File

@ -33,7 +33,12 @@
#include <asm/msr.h>
#include <asm/segment.h>
.data
/* We can free up trampoline after bootup if cpu hotplug is not supported. */
#ifndef CONFIG_HOTPLUG_CPU
.section .init.data, "aw", @progbits
#else
.section .rodata, "a", @progbits
#endif
.code16

4
arch/x86/mach-voyager/voyager_smp.c
View File

@ -442,8 +442,8 @@ static __u32 __init
setup_trampoline(void)
{
/* these two are global symbols in trampoline.S */
extern __u8 trampoline_end[];
extern __u8 trampoline_data[];
extern const __u8 trampoline_end[];
extern const __u8 trampoline_data[];
memcpy((__u8 *)trampoline_base, trampoline_data,
trampoline_end - trampoline_data);