From: Keir Fraser <keir.fraser@citrix.com>
Date: Thu, 17 Jan 2008 14:39:21 +0000 (+0000)
Subject: minios: Optimize IA64's get_current()
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~14445^2~33
X-Git-Url: https://dgit.raspbian.org/%22http:/www.example.com/cgi/%22https:/%22bookmarks://%22Dat/%22http:/www.example.com/cgi/%22https:/%22bookmarks:/%22Dat?a=commitdiff_plain;h=c56fe82b7d3720359e20a101e744d446e1be9d29;p=xen.git

minios: Optimize IA64's get_current()

Let gcc access r13 itself, leading to better code

Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>
---

diff --git a/extras/mini-os/include/ia64/arch_sched.h b/extras/mini-os/include/ia64/arch_sched.h
index 139a358443..f5714a3b6d 100644
--- a/extras/mini-os/include/ia64/arch_sched.h
+++ b/extras/mini-os/include/ia64/arch_sched.h
@@ -82,8 +82,7 @@ void arch_switch_threads(struct thread* prev, struct thread* next);
 
 static inline struct thread* get_current(void)
 {
-	struct thread *current;
-	__asm ("mov %0=r13" : "=r" (current));
+	register struct thread *current asm("r13");
 	return current;
 }