--- zzzz-none-000/linux-3.10.107/arch/s390/kernel/vdso64/clock_gettime.S	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/s390/kernel/vdso64/clock_gettime.S	2021-02-04 17:41:59.000000000 +0000
@@ -19,29 +19,31 @@
 	.type  __kernel_clock_gettime,@function
 __kernel_clock_gettime:
 	.cfi_startproc
+	aghi	%r15,-16
 	larl	%r5,_vdso_data
-	cghi	%r2,__CLOCK_REALTIME
+	cghi	%r2,__CLOCK_REALTIME_COARSE
 	je	4f
-	cghi	%r2,-2		/* CLOCK_THREAD_CPUTIME_ID for this thread */
+	cghi	%r2,__CLOCK_REALTIME
+	je	5f
+	cghi	%r2,-3		/* Per-thread CPUCLOCK with PID=0, VIRT=1 */
 	je	9f
+	cghi	%r2,__CLOCK_MONOTONIC_COARSE
+	je	3f
 	cghi	%r2,__CLOCK_MONOTONIC
 	jne	12f
 
 	/* CLOCK_MONOTONIC */
-	ltgr	%r3,%r3
-	jz	3f				/* tp == NULL */
 0:	lg	%r4,__VDSO_UPD_COUNT(%r5)	/* load update counter */
 	tmll	%r4,0x0001			/* pending update ? loop */
 	jnz	0b
-	stck	48(%r15)			/* Store TOD clock */
-	lg	%r1,48(%r15)
+	stcke	0(%r15)				/* Store TOD clock */
+	lgf	%r2,__VDSO_TK_SHIFT(%r5)	/* Timekeeper shift */
+	lg	%r0,__VDSO_WTOM_SEC(%r5)
+	lg	%r1,1(%r15)
 	sg	%r1,__VDSO_XTIME_STAMP(%r5)	/* TOD - cycle_last */
-	msgf	%r1,__VDSO_NTP_MULT(%r5)	/*  * NTP adjustment */
-	srlg	%r1,%r1,12			/* cyc2ns(clock,cycle_delta) */
-	alg	%r1,__VDSO_XTIME_NSEC(%r5)	/*  + xtime */
-	lg	%r0,__VDSO_XTIME_SEC(%r5)
-	alg	%r1,__VDSO_WTOM_NSEC(%r5)	/*  + wall_to_monotonic */
-	alg	%r0,__VDSO_WTOM_SEC(%r5)
+	msgf	%r1,__VDSO_TK_MULT(%r5)		/*  * tk->mult */
+	alg	%r1,__VDSO_WTOM_NSEC(%r5)
+	srlg	%r1,%r1,0(%r2)			/*  >> tk->shift */
 	clg	%r4,__VDSO_UPD_COUNT(%r5)	/* check update counter */
 	jne	0b
 	larl	%r5,13f
@@ -52,22 +54,42 @@
 	j	1b
 2:	stg	%r0,0(%r3)			/* store tp->tv_sec */
 	stg	%r1,8(%r3)			/* store tp->tv_nsec */
-3:	lghi	%r2,0
+	lghi	%r2,0
+	aghi	%r15,16
 	br	%r14
 
+	/* CLOCK_MONOTONIC_COARSE */
+3:	lg	%r4,__VDSO_UPD_COUNT(%r5)	/* load update counter */
+	tmll	%r4,0x0001			/* pending update ? loop */
+	jnz	3b
+	lg	%r0,__VDSO_WTOM_CRS_SEC(%r5)
+	lg	%r1,__VDSO_WTOM_CRS_NSEC(%r5)
+	clg	%r4,__VDSO_UPD_COUNT(%r5)	/* check update counter */
+	jne	3b
+	j	2b
+
+	/* CLOCK_REALTIME_COARSE */
+4:	lg	%r4,__VDSO_UPD_COUNT(%r5)	/* load update counter */
+	tmll	%r4,0x0001			/* pending update ? loop */
+	jnz	4b
+	lg	%r0,__VDSO_XTIME_CRS_SEC(%r5)
+	lg	%r1,__VDSO_XTIME_CRS_NSEC(%r5)
+	clg	%r4,__VDSO_UPD_COUNT(%r5)	/* check update counter */
+	jne	4b
+	j	7f
+
 	/* CLOCK_REALTIME */
-4:	ltr	%r3,%r3				/* tp == NULL */
-	jz	8f
 5:	lg	%r4,__VDSO_UPD_COUNT(%r5)	/* load update counter */
 	tmll	%r4,0x0001			/* pending update ? loop */
 	jnz	5b
-	stck	48(%r15)			/* Store TOD clock */
-	lg	%r1,48(%r15)
+	stcke	0(%r15)				/* Store TOD clock */
+	lgf	%r2,__VDSO_TK_SHIFT(%r5)	/* Timekeeper shift */
+	lg	%r1,1(%r15)
 	sg	%r1,__VDSO_XTIME_STAMP(%r5)	/* TOD - cycle_last */
-	msgf	%r1,__VDSO_NTP_MULT(%r5)	/*  * NTP adjustment */
-	srlg	%r1,%r1,12			/* cyc2ns(clock,cycle_delta) */
-	alg	%r1,__VDSO_XTIME_NSEC(%r5)	/*  + xtime */
-	lg	%r0,__VDSO_XTIME_SEC(%r5)
+	msgf	%r1,__VDSO_TK_MULT(%r5)		/*  * tk->mult */
+	alg	%r1,__VDSO_XTIME_NSEC(%r5)	/*  + tk->xtime_nsec */
+	srlg	%r1,%r1,0(%r2)			/*  >> tk->shift */
+	lg	%r0,__VDSO_XTIME_SEC(%r5)	/* tk->xtime_sec */
 	clg	%r4,__VDSO_UPD_COUNT(%r5)	/* check update counter */
 	jne	5b
 	larl	%r5,13f
@@ -78,10 +100,11 @@
 	j	6b
 7:	stg	%r0,0(%r3)			/* store tp->tv_sec */
 	stg	%r1,8(%r3)			/* store tp->tv_nsec */
-8:	lghi	%r2,0
+	lghi	%r2,0
+	aghi	%r15,16
 	br	%r14
 
-	/* CLOCK_THREAD_CPUTIME_ID for this thread */
+	/* CPUCLOCK_VIRT for this thread */
 9:	icm	%r0,15,__VDSO_ECTG_OK(%r5)
 	jz	12f
 	ear	%r2,%a4
@@ -112,11 +135,13 @@
 	slgr	%r4,%r0				/* r4 = tv_nsec */
 	stg	%r4,8(%r3)
 	lghi	%r2,0
+	aghi	%r15,16
 	br	%r14
 
 	/* Fallback to system call */
 12:	lghi	%r1,__NR_clock_gettime
 	svc	0
+	aghi	%r15,16
 	br	%r14
 
 13:	.quad	1000000000