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| 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 | ec7fcaabbfb3c5bd5189f857b6ac7bb9745ef291 (patch) | |
| tree | 9730e2849a9943e26f8d32f394296fd685b85e39 /arch/i386/kernel/cpu/common.c | |
| parent | [PATCH] i386: Implement smp_processor_id() with the PDA (diff) | |
| download | linux-dev-ec7fcaabbfb3c5bd5189f857b6ac7bb9745ef291.tar.xz linux-dev-ec7fcaabbfb3c5bd5189f857b6ac7bb9745ef291.zip | |
[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 'arch/i386/kernel/cpu/common.c')
| -rw-r--r-- | arch/i386/kernel/cpu/common.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/i386/kernel/cpu/common.c b/arch/i386/kernel/cpu/common.c index e476202b887f..6958ae5e2fa5 100644 --- a/arch/i386/kernel/cpu/common.c +++ b/arch/i386/kernel/cpu/common.c @@ -651,6 +651,7 @@ __cpuinit int alloc_gdt(int cpu) struct i386_pda boot_pda = { ._pda = &boot_pda, .cpu_number = 0, + .pcurrent = &init_task, }; static inline void set_kernel_gs(void) @@ -696,6 +697,7 @@ __cpuinit int init_gdt(int cpu, struct task_struct *idle) memset(pda, 0, sizeof(*pda)); pda->_pda = pda; pda->cpu_number = cpu; + pda->pcurrent = idle; return 1; } |