From: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Date: Fri, 21 Sep 2012 00:57:31 +0000 (+1000)
Subject: thp, s390: add missing earlyclobber to inline assembly
X-Git-Tag: next-20120925~1^2~280
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=cd627407ff9cfe1433a22436c1fa6827d56051c1;p=karo-tx-linux.git

thp, s390: add missing earlyclobber to inline assembly

The constraints of the rrbm inline assembly are missing two
earlyclobber operands, which can lead to an addressing exception
depending on compiler register allocation decisions.

Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 2fdab82e70d9..ed14fc2db6e0 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -1296,7 +1296,8 @@ static inline int pmdp_test_and_clear_young(struct vm_area_struct *vma,
 			"	ogr	%1,%0\n"
 			"	la	%3,0(%4,%3)\n"
 			"	brct	%2,0b\n"
-			: "=d" (tmp), "+d" (rc), "+d" (counter), "+a" (pmd_addr)
+			: "=&d" (tmp), "+&d" (rc), "+d" (counter),
+			  "+a" (pmd_addr)
 			: "a" (64 * 4096UL) : "cc");
 		rc = !!rc;
 	} else {