diff options
| author | Rusty Russell <rusty@rustcorp.com.au> | 2007-05-02 19:27:10 +0200 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2007-05-02 19:27:10 +0200 |
| commit | ae1ee11be77f51cedb6c569887dddc70c163ab6d (patch) | |
| tree | e579a6a6d10c6835cab9af47a2795bf40f669da6 /include | |
| parent | 8f9aeca7a081d81c4c9862be1e04f15b5ab5461f (diff) | |
[PATCH] i386: Use per-cpu variables for GDT, PDA
Allocating PDA and GDT at boot is a pain. Using simple per-cpu variables adds
happiness (although we need the GDT page-aligned for Xen, which we do in a
followup patch).
[akpm@linux-foundation.org: build fix]
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-generic/percpu.h | 1 | ||||
| -rw-r--r-- | include/asm-i386/desc.h | 1 | ||||
| -rw-r--r-- | include/asm-i386/pda.h | 7 | ||||
| -rw-r--r-- | include/asm-i386/processor.h | 2 |
4 files changed, 6 insertions, 5 deletions
diff --git a/include/asm-generic/percpu.h b/include/asm-generic/percpu.h index 196376262240..d984a9041436 100644 --- a/include/asm-generic/percpu.h +++ b/include/asm-generic/percpu.h @@ -1,6 +1,7 @@ #ifndef _ASM_GENERIC_PERCPU_H_ #define _ASM_GENERIC_PERCPU_H_ #include <linux/compiler.h> +#include <linux/threads.h> #define __GENERIC_PER_CPU #ifdef CONFIG_SMP diff --git a/include/asm-i386/desc.h b/include/asm-i386/desc.h index 050831f34f71..53c5916687b6 100644 --- a/include/asm-i386/desc.h +++ b/include/asm-i386/desc.h @@ -22,6 +22,7 @@ struct Xgt_desc_struct { extern struct Xgt_desc_struct idt_descr; DECLARE_PER_CPU(struct Xgt_desc_struct, cpu_gdt_descr); +DECLARE_PER_CPU(struct desc_struct, cpu_gdt[GDT_ENTRIES]); extern struct Xgt_desc_struct early_gdt_descr; static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu) diff --git a/include/asm-i386/pda.h b/include/asm-i386/pda.h index b12d59a318b7..aef7f732f77e 100644 --- a/include/asm-i386/pda.h +++ b/include/asm-i386/pda.h @@ -8,6 +8,7 @@ #include <linux/stddef.h> #include <linux/types.h> +#include <asm/percpu.h> struct i386_pda { @@ -18,10 +19,8 @@ struct i386_pda struct pt_regs *irq_regs; }; -extern struct i386_pda *_cpu_pda[]; - -#define cpu_pda(i) (_cpu_pda[i]) - +DECLARE_PER_CPU(struct i386_pda, _cpu_pda); +#define cpu_pda(i) (&per_cpu(_cpu_pda, (i))) #define pda_offset(field) offsetof(struct i386_pda, field) extern void __bad_pda_field(void); diff --git a/include/asm-i386/processor.h b/include/asm-i386/processor.h index 01ae0ffcf236..cd940befef53 100644 --- a/include/asm-i386/processor.h +++ b/include/asm-i386/processor.h @@ -743,7 +743,7 @@ extern unsigned long boot_option_idle_override; extern void enable_sep_cpu(void); extern int sysenter_setup(void); -extern int init_gdt(int cpu, struct task_struct *idle); +extern void init_gdt(int cpu, struct task_struct *idle); extern void cpu_set_gdt(int); extern void secondary_cpu_init(void); |