From: Jeremy Fitzhardinge Date: Thu, 7 Dec 2006 01:14:03 +0000 (+0100) Subject: [PATCH] i386: Store the interrupt regs pointer in the PDA X-Git-Tag: v2.6.20-rc1~145^2^2~8^2~122 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=70463daca852db396ce17f179d2404b257ba0f66;p=linux-2.6 [PATCH] i386: Store the interrupt regs pointer in the PDA Signed-off-by: Jeremy Fitzhardinge Signed-off-by: Andrew Morton Signed-off-by: Andi Kleen --- diff --git a/include/asm-i386/irq_regs.h b/include/asm-i386/irq_regs.h index 3dd9c0b702..a1b3f7f594 100644 --- a/include/asm-i386/irq_regs.h +++ b/include/asm-i386/irq_regs.h @@ -1 +1,27 @@ -#include +/* + * Per-cpu current frame pointer - the location of the last exception frame on + * the stack, stored in the PDA. + * + * Jeremy Fitzhardinge + */ +#ifndef _ASM_I386_IRQ_REGS_H +#define _ASM_I386_IRQ_REGS_H + +#include + +static inline struct pt_regs *get_irq_regs(void) +{ + return read_pda(irq_regs); +} + +static inline struct pt_regs *set_irq_regs(struct pt_regs *new_regs) +{ + struct pt_regs *old_regs; + + old_regs = read_pda(irq_regs); + write_pda(irq_regs, new_regs); + + return old_regs; +} + +#endif /* _ASM_I386_IRQ_REGS_H */ diff --git a/include/asm-i386/pda.h b/include/asm-i386/pda.h index 08a35c478a..2ba2736aa1 100644 --- a/include/asm-i386/pda.h +++ b/include/asm-i386/pda.h @@ -15,6 +15,7 @@ struct i386_pda int cpu_number; struct task_struct *pcurrent; /* current process */ + struct pt_regs *irq_regs; }; extern struct i386_pda *_cpu_pda[];