diff options
| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2006-12-07 04:14:03 +0300 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2006-12-07 04:14:03 +0300 |
| commit | ec7fcaabbfb3c5bd5189f857b6ac7bb9745ef291 (patch) | |
| tree | 9730e2849a9943e26f8d32f394296fd685b85e39 /include/asm-i386 | |
| parent | b2938f880890ebfcccad356275e0000193153623 (diff) | |
| download | linux-ec7fcaabbfb3c5bd5189f857b6ac7bb9745ef291.tar.xz | |
[PATCH] i386: Implement "current" with the PDA
Use the pcurrent field in the PDA to implement the "current" macro. This ends
up compiling down to a single instruction to get the current task.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Chuck Ebbert <76306.1226@compuserve.com>
Cc: Zachary Amsden <zach@vmware.com>
Cc: Jan Beulich <jbeulich@novell.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Diffstat (limited to 'include/asm-i386')
| -rw-r--r-- | include/asm-i386/current.h | 7 | ||||
| -rw-r--r-- | include/asm-i386/pda.h | 2 |
2 files changed, 6 insertions, 3 deletions
diff --git a/include/asm-i386/current.h b/include/asm-i386/current.h index 3cbbecd79016..5252ee0f6d7a 100644 --- a/include/asm-i386/current.h +++ b/include/asm-i386/current.h @@ -1,13 +1,14 @@ #ifndef _I386_CURRENT_H #define _I386_CURRENT_H -#include <linux/thread_info.h> +#include <asm/pda.h> +#include <linux/compiler.h> struct task_struct; -static __always_inline struct task_struct * get_current(void) +static __always_inline struct task_struct *get_current(void) { - return current_thread_info()->task; + return read_pda(pcurrent); } #define current get_current() diff --git a/include/asm-i386/pda.h b/include/asm-i386/pda.h index f90fde22566d..08a35c478af2 100644 --- a/include/asm-i386/pda.h +++ b/include/asm-i386/pda.h @@ -7,12 +7,14 @@ #define _I386_PDA_H #include <linux/stddef.h> +#include <linux/types.h> struct i386_pda { struct i386_pda *_pda; /* pointer to self */ int cpu_number; + struct task_struct *pcurrent; /* current process */ }; extern struct i386_pda *_cpu_pda[]; |