diff --git a/arch/s390/lib/uaccess.S b/arch/s390/lib/uaccess.S
index 88fc94fe6488079667b482264787b40b0c3d2660..5d59e26250481ec325b9740dccaefa0bf57765a3 100644
--- a/arch/s390/lib/uaccess.S
+++ b/arch/s390/lib/uaccess.S
@@ -198,12 +198,12 @@ __strnlen_user_asm:
 0:	srst	%r2,%r1
 	jo	0b
 	sacf	0
-	jh	1f		# \0 found in string ?
 	ahi	%r2,1		# strnlen_user result includes the \0
-1:	slr	%r2,%r3
+				# or return count+1 if \0 not found
+	slr	%r2,%r3
 	br	%r14
 2:	sacf	0
-	lhi	%r2,-EFAULT
+	slr	%r2,%r2		# return 0 on exception
 	br	%r14
 	.section __ex_table,"a"
 	.long	0b,2b
diff --git a/arch/s390/lib/uaccess64.S b/arch/s390/lib/uaccess64.S
index 50219786fc7ac8bc86138594a4fd253c3a2048eb..19b41a33c230cb02e1d5f527cb3c43bb12de0e31 100644
--- a/arch/s390/lib/uaccess64.S
+++ b/arch/s390/lib/uaccess64.S
@@ -194,12 +194,12 @@ __strnlen_user_asm:
 0:	srst	%r2,%r1
 	jo	0b
 	sacf	0
-	jh	1f		# \0 found in string ?
 	aghi	%r2,1		# strnlen_user result includes the \0
-1:	slgr	%r2,%r3
+				# or return count+1 if \0 not found
+	slgr	%r2,%r3
 	br	%r14
 2:	sacf	0
-	lghi	%r2,-EFAULT
+	slgr	%r2,%r2		# return 0 on exception
 	br	%r14
 	.section __ex_table,"a"
 	.quad	0b,2b