From: Martin Schwidefsky <schwidefsky@de.ibm.com>
Date: Wed, 5 Jan 2011 11:47:42 +0000 (+0100)
Subject: [S390] current_thread_info optimization
X-Git-Url: http://git.efficios.com/?a=commitdiff_plain;h=6432c015b754fef910dd7468b16fffc2b975348a;p=deliverable%2Flinux.git

[S390] current_thread_info optimization

Use thread_info lowcore field for current_thread_info(), saves
an unnecessary calculation.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

diff --git a/arch/s390/include/asm/thread_info.h b/arch/s390/include/asm/thread_info.h
index 5baf0230b29b..814520217945 100644
--- a/arch/s390/include/asm/thread_info.h
+++ b/arch/s390/include/asm/thread_info.h
@@ -74,7 +74,7 @@ struct thread_info {
 /* how to get the thread information struct from C */
 static inline struct thread_info *current_thread_info(void)
 {
-	return (struct thread_info *)(S390_lowcore.kernel_stack - THREAD_SIZE);
+	return (struct thread_info *) S390_lowcore.thread_info;
 }
 
 #define THREAD_SIZE_ORDER THREAD_ORDER