diff options
| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2006-12-07 02:14:03 +0100 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2006-12-07 02:14:03 +0100 |
| commit | 70463daca852db396ce17f179d2404b257ba0f66 (patch) | |
| tree | d0f89336cd46ab79e8a42239fa758cf43857491d /include/asm-i386 | |
| parent | [PATCH] i386: Implement "current" with the PDA (diff) | |
| download | linux-70463daca852db396ce17f179d2404b257ba0f66.tar.xz linux-70463daca852db396ce17f179d2404b257ba0f66.zip | |
[PATCH] i386: Store the interrupt regs pointer in the PDA
Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Andi Kleen <ak@suse.de>
Diffstat (limited to 'include/asm-i386')
| -rw-r--r-- | include/asm-i386/irq_regs.h | 28 | ||||
| -rw-r--r-- | include/asm-i386/pda.h | 1 |
2 files changed, 28 insertions, 1 deletions
diff --git a/include/asm-i386/irq_regs.h b/include/asm-i386/irq_regs.h index 3dd9c0b70270..a1b3f7f594a2 100644 --- a/include/asm-i386/irq_regs.h +++ b/include/asm-i386/irq_regs.h @@ -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 */ diff --git a/include/asm-i386/pda.h b/include/asm-i386/pda.h index 08a35c478af2..2ba2736aa109 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[]; |