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[PATCH] i386: Store the interrupt regs pointer in the PDA

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Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Andi Kleen <ak@suse.de>
This commit is contained in:
Jeremy Fitzhardinge 2006-12-07 02:14:03 +01:00 committed by Andi Kleen
parent ec7fcaabbf
commit 70463daca8
2 changed files with 28 additions and 1 deletions
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28
include/asm-i386/irq_regs.h
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@ -1 +1,27 @@
#include <asm-generic/irq_regs.h>
/*
* Per-cpu current frame pointer - the location of the last exception frame on
* the stack, stored in the PDA.
*
* Jeremy Fitzhardinge <jeremy@goop.org>
*/
#ifndef _ASM_I386_IRQ_REGS_H
#define _ASM_I386_IRQ_REGS_H
#include <asm/pda.h>
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 */

1
include/asm-i386/pda.h
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@ -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[];