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x86: move various CPU initialization objects into .cpuinit.rodata

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Impact: debuggability and micro-optimization

Putting whatever is possible into the (final) .rodata section increases
the likelihood of catching memory corruption bugs early, and reduces
false cache line sharing.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
LKML-Reference: <49B90961.76E4.0078.0@novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jan Beulich
2009-03-12 12:08:49 +00:00
committed by Ingo Molnar
parent 821508d4ef
commit 02dde8b45c
12 changed files with 36 additions and 35 deletions
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11
arch/x86/kernel/cpu/cpu.h
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@@ -5,15 +5,15 @@
struct cpu_model_info {
int vendor;
int family;
char *model_names[16];
const char *model_names[16];
};
/* attempt to consolidate cpu attributes */
struct cpu_dev {
char * c_vendor;
const char * c_vendor;
/* some have two possibilities for cpuid string */
char * c_ident[2];
const char * c_ident[2];
struct cpu_model_info c_models[4];
@@ -25,11 +25,12 @@ struct cpu_dev {
};
#define cpu_dev_register(cpu_devX) \
static struct cpu_dev *__cpu_dev_##cpu_devX __used \
static const struct cpu_dev *const __cpu_dev_##cpu_devX __used \
__attribute__((__section__(".x86_cpu_dev.init"))) = \
&cpu_devX;
extern struct cpu_dev *__x86_cpu_dev_start[], *__x86_cpu_dev_end[];
extern const struct cpu_dev *const __x86_cpu_dev_start[],
*const __x86_cpu_dev_end[];
extern void display_cacheinfo(struct cpuinfo_x86 *c);