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authorJeremy Fitzhardinge <jeremy@goop.org>2006-12-07 02:14:03 +0100
committerAndi Kleen <andi@basil.nowhere.org>2006-12-07 02:14:03 +0100
commitec7fcaabbfb3c5bd5189f857b6ac7bb9745ef291 (patch)
tree9730e2849a9943e26f8d32f394296fd685b85e39 /arch/i386/kernel/process.c
parentb2938f880890ebfcccad356275e0000193153623 (diff)
[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/process.c')
-rw-r--r--arch/i386/kernel/process.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/i386/kernel/process.c b/arch/i386/kernel/process.c
index dc4272545179..8749b10d3805 100644
--- a/arch/i386/kernel/process.c
+++ b/arch/i386/kernel/process.c
@@ -684,6 +684,7 @@ struct task_struct fastcall * __switch_to(struct task_struct *prev_p, struct tas
if (unlikely(prev->fs | next->fs))
loadsegment(fs, next->fs);
+ write_pda(pcurrent, next_p);
/*
* Restore IOPL if needed.