[PATCH] thp, s390: add missing earlyclobber to inline assembly

[Gerald Schaefer]

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@xxxxxxxxxx>
---

Hello Andrew, please merge this with patch
thp-s390-architecture-backend-for-thp-on-s390.patch

 arch/s390/include/asm/pgtable.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 1393a3c..ce67458 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 {
-- 
1.7.11.6

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