diff --git a/arch/s390/kernel/base.S b/arch/s390/kernel/base.S
index c880ff7..8c20d0e 100644
--- a/arch/s390/kernel/base.S
+++ b/arch/s390/kernel/base.S
@@ -9,6 +9,7 @@
 #include <linux/linkage.h>
 #include <asm/asm-offsets.h>
 #include <asm/ptrace.h>
+#include <asm/sigp.h>
 
 #ifdef CONFIG_64BIT
 
@@ -100,7 +101,7 @@
 .Lrestart_part2:
 	lhi	%r0,0			# Load r0 with zero
 	lhi	%r1,2			# Use mode 2 = ESAME (dump)
-	sigp	%r1,%r0,0x12		# Switch to ESAME mode
+	sigp	%r1,%r0,SIGP_SET_ARCHITECTURE	# Switch to ESAME mode
 	sam64				# Switch to 64 bit addressing mode
 	larl	%r4,.Lctlregs		# Restore control registers
 	lctlg	%c0,%c15,0(%r4)
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 1ae93b5..3787f9e 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -18,6 +18,7 @@
 #include <asm/asm-offsets.h>
 #include <asm/unistd.h>
 #include <asm/page.h>
+#include <asm/sigp.h>
 
 __PT_R0      =	__PT_GPRS
 __PT_R1      =	__PT_GPRS + 4
@@ -726,12 +727,12 @@
 	lm	%r1,%r3,__LC_RESTART_FN		# load fn, parm & source cpu
 	ltr	%r3,%r3				# test source cpu address
 	jm	1f				# negative -> skip source stop
-0:	sigp	%r4,%r3,1			# sigp sense to source cpu
+0:	sigp	%r4,%r3,SIGP_SENSE		# sigp sense to source cpu
 	brc	10,0b				# wait for status stored
 1:	basr	%r14,%r1			# call function
 	stap	__SF_EMPTY(%r15)		# store cpu address
 	lh	%r3,__SF_EMPTY(%r15)
-2:	sigp	%r4,%r3,5			# sigp stop to current cpu
+2:	sigp	%r4,%r3,SIGP_STOP		# sigp stop to current cpu
 	brc	2,2b
 3:	j	3b
 
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
index bf80a59..d5f02e4 100644
--- a/arch/s390/kernel/entry64.S
+++ b/arch/s390/kernel/entry64.S
@@ -18,6 +18,7 @@
 #include <asm/asm-offsets.h>
 #include <asm/unistd.h>
 #include <asm/page.h>
+#include <asm/sigp.h>
 
 __PT_R0      =	__PT_GPRS
 __PT_R1      =	__PT_GPRS + 8
@@ -753,12 +754,12 @@
 	lmg	%r1,%r3,__LC_RESTART_FN		# load fn, parm & source cpu
 	ltgr	%r3,%r3				# test source cpu address
 	jm	1f				# negative -> skip source stop
-0:	sigp	%r4,%r3,1			# sigp sense to source cpu
+0:	sigp	%r4,%r3,SIGP_SENSE		# sigp sense to source cpu
 	brc	10,0b				# wait for status stored
 1:	basr	%r14,%r1			# call function
 	stap	__SF_EMPTY(%r15)		# store cpu address
 	llgh	%r3,__SF_EMPTY(%r15)
-2:	sigp	%r4,%r3,5			# sigp stop to current cpu
+2:	sigp	%r4,%r3,SIGP_STOP		# sigp stop to current cpu
 	brc	2,2b
 3:	j	3b
 
diff --git a/arch/s390/kernel/head_kdump.S b/arch/s390/kernel/head_kdump.S
index 796c976..acaaaf4 100644
--- a/arch/s390/kernel/head_kdump.S
+++ b/arch/s390/kernel/head_kdump.S
@@ -5,6 +5,8 @@
  * Author(s): Michael Holzheu <holzheu@linux.vnet.ibm.com>
  */
 
+#include <asm/sigp.h>
+
 #define DATAMOVER_ADDR	0x4000
 #define COPY_PAGE_ADDR	0x6000
 
@@ -19,7 +21,7 @@
 .align 2
 .Lep_startup_kdump:
 	lhi	%r1,2				# mode 2 = esame (dump)
-	sigp	%r1,%r0,0x12			# Switch to esame mode
+	sigp	%r1,%r0,SIGP_SET_ARCHITECTURE	# Switch to esame mode
 	sam64					# Switch to 64 bit addressing
 	basr	%r13,0
 .Lbase:
@@ -88,7 +90,7 @@
 	sam31					# Switch to 31 bit addr mode
 	sr	%r1,%r1				# Erase register r1
 	sr	%r2,%r2				# Erase register r2
-	sigp	%r1,%r2,0x12			# Switch to 31 bit arch mode
+	sigp	%r1,%r2,SIGP_SET_ARCHITECTURE	# Switch to 31 bit arch mode
 	lpsw	0				# Start new kernel...
 .align	8
 .Lrestart_psw:
diff --git a/arch/s390/kernel/reipl.S b/arch/s390/kernel/reipl.S
index ad67c21..1c5e9e3 100644
--- a/arch/s390/kernel/reipl.S
+++ b/arch/s390/kernel/reipl.S
@@ -8,6 +8,7 @@
 
 #include <linux/linkage.h>
 #include <asm/asm-offsets.h>
+#include <asm/sigp.h>
 
 #
 # store_status: Empty implementation until kdump is supported on 31 bit
@@ -60,7 +61,7 @@
 		bas	%r14,.Ldisab-.Lpg0(%r13)
 .L003:		st	%r1,__LC_SUBCHANNEL_ID
 		lpsw	0
-		sigp	0,0,0(6)
+		sigp	0,0,SIGP_RESTART
 .Ldisab:	st	%r14,.Ldispsw+4-.Lpg0(%r13)
 		lpsw	.Ldispsw-.Lpg0(%r13)
 		.align	8
diff --git a/arch/s390/kernel/reipl64.S b/arch/s390/kernel/reipl64.S
index 36b3265..02f5a73 100644
--- a/arch/s390/kernel/reipl64.S
+++ b/arch/s390/kernel/reipl64.S
@@ -6,6 +6,7 @@
 
 #include <linux/linkage.h>
 #include <asm/asm-offsets.h>
+#include <asm/sigp.h>
 
 #
 # store_status
@@ -106,7 +107,7 @@
 .L003:		st	%r1,__LC_SUBCHANNEL_ID
 		lhi	%r1,0		 # mode 0 = esa
 		slr	%r0,%r0 	 # set cpuid to zero
-		sigp	%r1,%r0,0x12	 # switch to esa mode
+		sigp	%r1,%r0,SIGP_SET_ARCHITECTURE # switch to esa mode
 		lpsw	0
 .Ldisab:	sll	%r14,1
 		srl	%r14,1		 # need to kill hi bit to avoid specification exceptions.
diff --git a/arch/s390/kernel/relocate_kernel.S b/arch/s390/kernel/relocate_kernel.S
index c91d70a..bfad96a 100644
--- a/arch/s390/kernel/relocate_kernel.S
+++ b/arch/s390/kernel/relocate_kernel.S
@@ -9,6 +9,7 @@
  */
 
 #include <linux/linkage.h>
+#include <asm/sigp.h>
 
 /*
  * moves the new kernel to its destination...
@@ -93,7 +94,7 @@
 	.no_diag308:
 		sr	%r1,%r1		# clear %r1
 		sr	%r2,%r2		# clear %r2
-		sigp	%r1,%r2,0x12	# set cpuid to zero
+		sigp	%r1,%r2,SIGP_SET_ARCHITECTURE # set cpuid to zero
 		lpsw	0		# hopefully start new kernel...
 
 		.align	8
diff --git a/arch/s390/kernel/relocate_kernel64.S b/arch/s390/kernel/relocate_kernel64.S
index 7c3ce58..35508f3 100644
--- a/arch/s390/kernel/relocate_kernel64.S
+++ b/arch/s390/kernel/relocate_kernel64.S
@@ -9,6 +9,7 @@
  */
 
 #include <linux/linkage.h>
+#include <asm/sigp.h>
 
 /*
  * moves the new kernel to its destination...
@@ -45,7 +46,7 @@
 		diag	%r0,%r0,0x308
 	.back:
 		lhi	%r1,1		# mode 1 = esame
-		sigp	%r1,%r0,0x12	# switch to esame mode
+		sigp	%r1,%r0,SIGP_SET_ARCHITECTURE # switch to esame mode
 		sam64			# switch to 64 bit addressing mode
 		basr	%r13,0
 	.back_base:
@@ -96,7 +97,7 @@
 		sam31			# 31 bit mode
 		sr	%r1,%r1		# erase register r1
 		sr	%r2,%r2		# erase register r2
-		sigp	%r1,%r2,0x12	# set cpuid to zero
+		sigp	%r1,%r2,SIGP_SET_ARCHITECTURE # set cpuid to zero
 		lpsw	0		# hopefully start new kernel...
 
 		.align	8
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 53ac234..e014084 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -288,11 +288,13 @@
 	/* Restart func on the target cpu and stop the current cpu. */
 	memcpy_absolute(&lc->restart_stack, &restart, sizeof(restart));
 	asm volatile(
-		"0:	sigp	0,%0,6	# sigp restart to target cpu\n"
+		"0:	sigp	0,%0,%2	# sigp restart to target cpu\n"
 		"	brc	2,0b	# busy, try again\n"
-		"1:	sigp	0,%1,5	# sigp stop to current cpu\n"
+		"1:	sigp	0,%1,%3	# sigp stop to current cpu\n"
 		"	brc	2,1b	# busy, try again\n"
-		: : "d" (pcpu->address), "d" (restart.source) : "0", "1", "cc");
+		: : "d" (pcpu->address), "d" (restart.source),
+		    "K" (SIGP_RESTART), "K" (SIGP_STOP)
+		: "0", "1", "cc");
 	for (;;) ;
 }
 
diff --git a/arch/s390/kernel/swsusp_asm64.S b/arch/s390/kernel/swsusp_asm64.S
index dd70ef0..d4ca4e0 100644
--- a/arch/s390/kernel/swsusp_asm64.S
+++ b/arch/s390/kernel/swsusp_asm64.S
@@ -12,6 +12,7 @@
 #include <asm/ptrace.h>
 #include <asm/thread_info.h>
 #include <asm/asm-offsets.h>
+#include <asm/sigp.h>
 
 /*
  * Save register context in absolute 0 lowcore and call swsusp_save() to
@@ -163,7 +164,7 @@
 	diag	%r0,%r0,0x308
 restart_entry:
 	lhi	%r1,1
-	sigp	%r1,%r0,0x12
+	sigp	%r1,%r0,SIGP_SET_ARCHITECTURE
 	sam64
 	larl	%r1,.Lnew_pgm_check_psw
 	lpswe	0(%r1)
@@ -179,7 +180,7 @@
 	larl	%r4,.Lrestart_suspend_psw	/* Set new restart PSW */
 	mvc	__LC_RST_NEW_PSW(16,%r0),0(%r4)
 3:
-	sigp	%r9,%r1,11			/* sigp initial cpu reset */
+	sigp	%r9,%r1,SIGP_INITIAL_CPU_RESET	/* sigp initial cpu reset */
 	brc	8,4f				/* accepted */
 	brc	2,3b				/* busy, try again */
 
@@ -190,16 +191,16 @@
 	larl	%r3,_sclp_print_early
 	lghi	%r1,0
 	sam31
-	sigp	%r1,%r0,0x12
+	sigp	%r1,%r0,SIGP_SET_ARCHITECTURE
 	basr	%r14,%r3
 	larl	%r3,.Ldisabled_wait_31
 	lpsw	0(%r3)
 4:
 	/* Switch to suspend CPU */
-	sigp	%r9,%r1,6		/* sigp restart to suspend CPU */
+	sigp	%r9,%r1,SIGP_RESTART	/* sigp restart to suspend CPU */
 	brc	2,4b			/* busy, try again */
 5:
-	sigp	%r9,%r2,5		/* sigp stop to current resume CPU */
+	sigp	%r9,%r2,SIGP_STOP	/* sigp stop to current resume CPU */
 	brc	2,5b			/* busy, try again */
 6:	j	6b
 
@@ -207,7 +208,7 @@
 	larl	%r1,.Lresume_cpu
 	llgh	%r2,0(%r1)
 7:
-	sigp	%r9,%r2,1		/* sigp sense, wait for resume CPU */
+	sigp	%r9,%r2,SIGP_SENSE	/* sigp sense, wait for resume CPU */
 	brc	8,7b			/* accepted, status 0, still running */
 	brc	2,7b			/* busy, try again */
 	tmll	%r9,0x40		/* Test if resume CPU is stopped */