s390: remove 31 bit support

Remove the 31 bit support in order to reduce maintenance cost and effectively remove dead code. Since a couple of years there is no distribution left that comes with a 31 bit kernel. The 31 bit kernel also has been broken since more than a year before anybody noticed. In addition I added a removal warning to the kernel shown at ipl for 5 minutes: a960062e58 ("s390: add 31 bit warning message") which let everybody know about the plan to remove 31 bit code. We didn't get any response. Given that the last 31 bit only machine was introduced in 1999 let's remove the code. Anybody with 31 bit user space code can still use the compat mode. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2026-01-06 11:08:10 -08:00 · 2015-02-12 13:08:27 +01:00
parent 1833c9f647
commit 5a79859ae0
97 changed files with 170 additions and 6016 deletions
--- a/arch/s390/Kbuild
+++ b/arch/s390/Kbuild
@@ -4,6 +4,5 @@ obj-$(CONFIG_KVM)		+= kvm/
 obj-$(CONFIG_CRYPTO_HW)		+= crypto/
 obj-$(CONFIG_S390_HYPFS_FS)	+= hypfs/
 obj-$(CONFIG_APPLDATA_BASE)	+= appldata/
-obj-$(CONFIG_MATHEMU)		+= math-emu/
 obj-y				+= net/
 obj-$(CONFIG_PCI)		+= pci/
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -35,7 +35,7 @@ config GENERIC_BUG_RELATIVE_POINTERS
 	def_bool y

 config ARCH_DMA_ADDR_T_64BIT
-	def_bool 64BIT
+	def_bool y

 config GENERIC_LOCKBREAK
 	def_bool y if SMP && PREEMPT
@@ -59,7 +59,7 @@ config PCI_QUIRKS
 	def_bool n

 config ARCH_SUPPORTS_UPROBES
-	def_bool 64BIT
+	def_bool y

 config S390
 	def_bool y
@@ -110,19 +110,19 @@ config S390
 	select GENERIC_TIME_VSYSCALL
 	select HAVE_ALIGNED_STRUCT_PAGE if SLUB
 	select HAVE_ARCH_AUDITSYSCALL
-	select HAVE_ARCH_JUMP_LABEL if !MARCH_G5
+	select HAVE_ARCH_JUMP_LABEL
 	select HAVE_ARCH_SECCOMP_FILTER
 	select HAVE_ARCH_TRACEHOOK
-	select HAVE_ARCH_TRANSPARENT_HUGEPAGE if 64BIT
-	select HAVE_BPF_JIT if 64BIT && PACK_STACK
+	select HAVE_ARCH_TRANSPARENT_HUGEPAGE
+	select HAVE_BPF_JIT if PACK_STACK
 	select HAVE_CMPXCHG_DOUBLE
 	select HAVE_CMPXCHG_LOCAL
 	select HAVE_DEBUG_KMEMLEAK
-	select HAVE_DYNAMIC_FTRACE if 64BIT
-	select HAVE_DYNAMIC_FTRACE_WITH_REGS if 64BIT
+	select HAVE_DYNAMIC_FTRACE
+	select HAVE_DYNAMIC_FTRACE_WITH_REGS
 	select HAVE_FTRACE_MCOUNT_RECORD
-	select HAVE_FUNCTION_GRAPH_TRACER if 64BIT
-	select HAVE_FUNCTION_TRACER if 64BIT
+	select HAVE_FUNCTION_GRAPH_TRACER
+	select HAVE_FUNCTION_TRACER
 	select HAVE_FUTEX_CMPXCHG if FUTEX
 	select HAVE_KERNEL_BZIP2
 	select HAVE_KERNEL_GZIP
@@ -132,7 +132,7 @@ config S390
 	select HAVE_KERNEL_XZ
 	select HAVE_KPROBES
 	select HAVE_KRETPROBES
-	select HAVE_KVM if 64BIT
+	select HAVE_KVM
 	select HAVE_MEMBLOCK
 	select HAVE_MEMBLOCK_NODE_MAP
 	select HAVE_MEMBLOCK_PHYS_MAP
@@ -141,7 +141,6 @@ config S390
 	select HAVE_PERF_EVENTS
 	select HAVE_REGS_AND_STACK_ACCESS_API
 	select HAVE_SYSCALL_TRACEPOINTS
-	select HAVE_UID16 if 32BIT
 	select HAVE_VIRT_CPU_ACCOUNTING
 	select MODULES_USE_ELF_RELA
 	select NO_BOOTMEM
@@ -190,18 +189,11 @@ config HAVE_MARCH_Z13_FEATURES

 choice
 	prompt "Processor type"
-	default MARCH_G5
-
-config MARCH_G5
-	bool "System/390 model G5 and G6"
-	depends on !64BIT
-	help
-	  Select this to build a 31 bit kernel that works
-	  on all ESA/390 and z/Architecture machines.
+	default MARCH_Z900

 config MARCH_Z900
 	bool "IBM zSeries model z800 and z900"
-	select HAVE_MARCH_Z900_FEATURES if 64BIT
+	select HAVE_MARCH_Z900_FEATURES
 	help
 	  Select this to enable optimizations for model z800/z900 (2064 and
 	  2066 series). This will enable some optimizations that are not
@@ -209,7 +201,7 @@ config MARCH_Z900

 config MARCH_Z990
 	bool "IBM zSeries model z890 and z990"
-	select HAVE_MARCH_Z990_FEATURES if 64BIT
+	select HAVE_MARCH_Z990_FEATURES
 	help
 	  Select this to enable optimizations for model z890/z990 (2084 and
 	  2086 series). The kernel will be slightly faster but will not work
@@ -217,7 +209,7 @@ config MARCH_Z990

 config MARCH_Z9_109
 	bool "IBM System z9"
-	select HAVE_MARCH_Z9_109_FEATURES if 64BIT
+	select HAVE_MARCH_Z9_109_FEATURES
 	help
 	  Select this to enable optimizations for IBM System z9 (2094 and
 	  2096 series). The kernel will be slightly faster but will not work
@@ -225,7 +217,7 @@ config MARCH_Z9_109

 config MARCH_Z10
 	bool "IBM System z10"
-	select HAVE_MARCH_Z10_FEATURES if 64BIT
+	select HAVE_MARCH_Z10_FEATURES
 	help
 	  Select this to enable optimizations for IBM System z10 (2097 and
 	  2098 series). The kernel will be slightly faster but will not work
@@ -233,7 +225,7 @@ config MARCH_Z10

 config MARCH_Z196
 	bool "IBM zEnterprise 114 and 196"
-	select HAVE_MARCH_Z196_FEATURES if 64BIT
+	select HAVE_MARCH_Z196_FEATURES
 	help
 	  Select this to enable optimizations for IBM zEnterprise 114 and 196
 	  (2818 and 2817 series). The kernel will be slightly faster but will
@@ -241,7 +233,7 @@ config MARCH_Z196

 config MARCH_ZEC12
 	bool "IBM zBC12 and zEC12"
-	select HAVE_MARCH_ZEC12_FEATURES if 64BIT
+	select HAVE_MARCH_ZEC12_FEATURES
 	help
 	  Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
 	  2827 series). The kernel will be slightly faster but will not work on
@@ -249,7 +241,7 @@ config MARCH_ZEC12

 config MARCH_Z13
 	bool "IBM z13"
-	select HAVE_MARCH_Z13_FEATURES if 64BIT
+	select HAVE_MARCH_Z13_FEATURES
 	help
 	  Select this to enable optimizations for IBM z13 (2964 series).
 	  The kernel will be slightly faster but will not work on older
@@ -257,9 +249,6 @@ config MARCH_Z13

 endchoice

-config MARCH_G5_TUNE
-	def_bool TUNE_G5 || MARCH_G5 && TUNE_DEFAULT
-
 config MARCH_Z900_TUNE
 	def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT

@@ -298,9 +287,6 @@ config TUNE_DEFAULT
 	  Tune the generated code for the target processor for which the kernel
 	  will be compiled.

-config TUNE_G5
-	bool "System/390 model G5 and G6"
-
 config TUNE_Z900
 	bool "IBM zSeries model z800 and z900"

@@ -326,18 +312,10 @@ endchoice

 config 64BIT
 	def_bool y
-	prompt "64 bit kernel"
-	help
-	  Select this option if you have an IBM z/Architecture machine
-	  and want to use the 64 bit addressing mode.
-
-config 32BIT
-	def_bool y if !64BIT

 config COMPAT
 	def_bool y
 	prompt "Kernel support for 31 bit emulation"
-	depends on 64BIT
 	select COMPAT_BINFMT_ELF if BINFMT_ELF
 	select ARCH_WANT_OLD_COMPAT_IPC
 	select COMPAT_OLD_SIGACTION
@@ -376,8 +354,7 @@ config NR_CPUS
 	int "Maximum number of CPUs (2-512)"
 	range 2 512
 	depends on SMP
-	default "32" if !64BIT
-	default "64" if 64BIT
+	default "64"
 	help
 	  This allows you to specify the maximum number of CPUs which this
 	  kernel will support. The maximum supported value is 512 and the
@@ -418,15 +395,6 @@ config SCHED_TOPOLOGY

 source kernel/Kconfig.preempt

-config MATHEMU
-	def_bool y
-	prompt "IEEE FPU emulation"
-	depends on MARCH_G5
-	help
-	  This option is required for IEEE compliant floating point arithmetic
-	  on older ESA/390 machines. Say Y unless you know your machine doesn't
-	  need this.
-
 source kernel/Kconfig.hz

 endmenu
@@ -437,7 +405,6 @@ config ARCH_SPARSEMEM_ENABLE
 	def_bool y
 	select SPARSEMEM_VMEMMAP_ENABLE
 	select SPARSEMEM_VMEMMAP
-	select SPARSEMEM_STATIC if !64BIT

 config ARCH_SPARSEMEM_DEFAULT
 	def_bool y
@@ -453,7 +420,6 @@ config ARCH_ENABLE_MEMORY_HOTREMOVE

 config ARCH_ENABLE_SPLIT_PMD_PTLOCK
 	def_bool y
-	depends on 64BIT

 config FORCE_MAX_ZONEORDER
 	int
@@ -528,7 +494,6 @@ config QDIO

 menuconfig PCI
 	bool "PCI support"
-	depends on 64BIT
 	select HAVE_DMA_ATTRS
 	select PCI_MSI
 	help
@@ -598,7 +563,6 @@ config CHSC_SCH

 config SCM_BUS
 	def_bool y
-	depends on 64BIT
 	prompt "SCM bus driver"
 	help
 	  Bus driver for Storage Class Memory.
@@ -620,7 +584,7 @@ menu "Dump support"

 config CRASH_DUMP
 	bool "kernel crash dumps"
-	depends on 64BIT && SMP
+	depends on SMP
 	select KEXEC
 	help
 	  Generate crash dump after being started by kexec.
@@ -659,7 +623,7 @@ endmenu
 menu "Power Management"

 config ARCH_HIBERNATION_POSSIBLE
-	def_bool y if 64BIT
+	def_bool y

 source "kernel/power/Kconfig"

@@ -810,7 +774,6 @@ source "arch/s390/kvm/Kconfig"
 config S390_GUEST
 	def_bool y
 	prompt "s390 support for virtio devices"
-	depends on 64BIT
 	select TTY
 	select VIRTUALIZATION
 	select VIRTIO
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -13,15 +13,6 @@
 # Copyright (C) 1994 by Linus Torvalds
 #

-ifndef CONFIG_64BIT
-LD_BFD		:= elf32-s390
-LDFLAGS		:= -m elf_s390
-KBUILD_CFLAGS	+= -m31
-KBUILD_AFLAGS	+= -m31
-UTS_MACHINE	:= s390
-STACK_SIZE	:= 8192
-CHECKFLAGS	+= -D__s390__ -msize-long
-else
 LD_BFD		:= elf64-s390
 LDFLAGS		:= -m elf64_s390
 KBUILD_AFLAGS_MODULE += -fPIC
@@ -31,11 +22,9 @@ KBUILD_AFLAGS	+= -m64
 UTS_MACHINE	:= s390x
 STACK_SIZE	:= 16384
 CHECKFLAGS	+= -D__s390__ -D__s390x__
-endif

 export LD_BFD

-mflags-$(CONFIG_MARCH_G5)     := -march=g5
 mflags-$(CONFIG_MARCH_Z900)   := -march=z900
 mflags-$(CONFIG_MARCH_Z990)   := -march=z990
 mflags-$(CONFIG_MARCH_Z9_109) := -march=z9-109
@@ -47,7 +36,6 @@ mflags-$(CONFIG_MARCH_Z13)   := -march=z13
 aflags-y += $(mflags-y)
 cflags-y += $(mflags-y)

-cflags-$(CONFIG_MARCH_G5_TUNE)		+= -mtune=g5
 cflags-$(CONFIG_MARCH_Z900_TUNE)	+= -mtune=z900
 cflags-$(CONFIG_MARCH_Z990_TUNE)	+= -mtune=z990
 cflags-$(CONFIG_MARCH_Z9_109_TUNE)	+= -mtune=z9-109
@@ -104,7 +92,7 @@ KBUILD_AFLAGS	+= $(aflags-y)
 OBJCOPYFLAGS	:= -O binary

 head-y		:= arch/s390/kernel/head.o
-head-y		+= arch/s390/kernel/$(if $(CONFIG_64BIT),head64.o,head31.o)
+head-y		+= arch/s390/kernel/head64.o

 # See arch/s390/Kbuild for content of core part of the kernel
 core-y		+= arch/s390/
@@ -129,9 +117,7 @@ zfcpdump:
 	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@

 vdso_install:
-ifeq ($(CONFIG_64BIT),y)
 	$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
-endif
 	$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@

 archclean:
--- a/arch/s390/boot/compressed/Makefile
+++ b/arch/s390/boot/compressed/Makefile
@@ -4,13 +4,11 @@
 # create a compressed vmlinux image from the original vmlinux
 #

-BITS := $(if $(CONFIG_64BIT),64,31)
-
 targets	:= vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2
 targets += vmlinux.bin.xz vmlinux.bin.lzma vmlinux.bin.lzo vmlinux.bin.lz4
-targets += misc.o piggy.o sizes.h head$(BITS).o
+targets += misc.o piggy.o sizes.h head64.o

-KBUILD_CFLAGS := -m$(BITS) -D__KERNEL__ $(LINUX_INCLUDE) -O2
+KBUILD_CFLAGS := -m64 -D__KERNEL__ $(LINUX_INCLUDE) -O2
 KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
 KBUILD_CFLAGS += $(cflags-y) -fno-delete-null-pointer-checks
 KBUILD_CFLAGS += $(call cc-option,-mpacked-stack)
@@ -19,7 +17,7 @@ KBUILD_CFLAGS += $(call cc-option,-ffreestanding)
 GCOV_PROFILE := n

 OBJECTS := $(addprefix $(objtree)/arch/s390/kernel/, head.o sclp.o ebcdic.o)
-OBJECTS += $(obj)/head$(BITS).o $(obj)/misc.o $(obj)/piggy.o
+OBJECTS += $(obj)/head64.o $(obj)/misc.o $(obj)/piggy.o

 LDFLAGS_vmlinux := --oformat $(LD_BFD) -e startup -T
 $(obj)/vmlinux: $(obj)/vmlinux.lds $(OBJECTS)
@@ -34,8 +32,8 @@ quiet_cmd_sizes = GEN $@
 $(obj)/sizes.h: vmlinux
 	$(call if_changed,sizes)

-AFLAGS_head$(BITS).o += -I$(obj)
-$(obj)/head$(BITS).o: $(obj)/sizes.h
+AFLAGS_head64.o += -I$(obj)
+$(obj)/head64.o: $(obj)/sizes.h

 CFLAGS_misc.o += -I$(obj)
 $(obj)/misc.o: $(obj)/sizes.h
--- a/arch/s390/boot/compressed/head31.S
+++ b/arch/s390/boot/compressed/head31.S
@@ -1,51 +0,0 @@
-/*
- * Startup glue code to uncompress the kernel
- *
- * Copyright IBM Corp. 2010
- *
- *   Author(s):	Martin Schwidefsky <schwidefsky@de.ibm.com>
- */
-
-#include <linux/init.h>
-#include <linux/linkage.h>
-#include <asm/asm-offsets.h>
-#include <asm/thread_info.h>
-#include <asm/page.h>
-#include "sizes.h"
-
-__HEAD
-ENTRY(startup_continue)
-	basr	%r13,0			# get base
-.LPG1:
-	# setup stack
-	l	%r15,.Lstack-.LPG1(%r13)
-	ahi	%r15,-96
-	l	%r1,.Ldecompress-.LPG1(%r13)
-	basr	%r14,%r1
-	# setup registers for memory mover & branch to target
-	lr	%r4,%r2
-	l	%r2,.Loffset-.LPG1(%r13)
-	la	%r4,0(%r2,%r4)
-	l	%r3,.Lmvsize-.LPG1(%r13)
-	lr	%r5,%r3
-	# move the memory mover someplace safe
-	la	%r1,0x200
-	mvc	0(mover_end-mover,%r1),mover-.LPG1(%r13)
-	# decompress image is started at 0x11000
-	lr	%r6,%r2
-	br	%r1
-mover:
-	mvcle	%r2,%r4,0
-	jo	mover
-	br	%r6
-mover_end:
-
-	.align	8
-.Lstack:
-	.long	0x8000 + (1<<(PAGE_SHIFT+THREAD_ORDER))
-.Ldecompress:
-	.long	decompress_kernel
-.Loffset:
-	.long	0x11000
-.Lmvsize:
-	.long	SZ__bss_start
--- a/arch/s390/boot/compressed/vmlinux.lds.S
+++ b/arch/s390/boot/compressed/vmlinux.lds.S
@@ -1,12 +1,7 @@
 #include <asm-generic/vmlinux.lds.h>

-#ifdef CONFIG_64BIT
 OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
 OUTPUT_ARCH(s390:64-bit)
-#else
-OUTPUT_FORMAT("elf32-s390", "elf32-s390", "elf32-s390")
-OUTPUT_ARCH(s390:31-bit)
-#endif

 ENTRY(startup)

--- a/arch/s390/hypfs/hypfs_diag0c.c
+++ b/arch/s390/hypfs/hypfs_diag0c.c
@@ -19,13 +19,9 @@
 static void diag0c(struct hypfs_diag0c_entry *entry)
 {
 	asm volatile (
-#ifdef CONFIG_64BIT
 		"	sam31\n"
 		"	diag	%0,%0,0x0c\n"
 		"	sam64\n"
-#else
-		"	diag %0,%0,0x0c\n"
-#endif
 		: /* no output register */
 		: "a" (entry)
 		: "memory");
--- a/arch/s390/include/asm/appldata.h
+++ b/arch/s390/include/asm/appldata.h
@@ -9,28 +9,6 @@

 #include <asm/io.h>

-#ifndef CONFIG_64BIT
-
-#define APPLDATA_START_INTERVAL_REC	0x00	/* Function codes for */
-#define APPLDATA_STOP_REC		0x01	/* DIAG 0xDC	      */
-#define APPLDATA_GEN_EVENT_REC		0x02
-#define APPLDATA_START_CONFIG_REC	0x03
-
-/*
- * Parameter list for DIAGNOSE X'DC'
- */
-struct appldata_parameter_list {
-	u16 diag;		/* The DIAGNOSE code X'00DC'	      */
-	u8  function;		/* The function code for the DIAGNOSE */
-	u8  parlist_length;	/* Length of the parameter list       */
-	u32 product_id_addr;	/* Address of the 16-byte product ID  */
-	u16 reserved;
-	u16 buffer_length;	/* Length of the application data buffer  */
-	u32 buffer_addr;	/* Address of the application data buffer */
-} __attribute__ ((packed));
-
-#else /* CONFIG_64BIT */
-
 #define APPLDATA_START_INTERVAL_REC	0x80
 #define APPLDATA_STOP_REC		0x81
 #define APPLDATA_GEN_EVENT_REC		0x82
@@ -51,8 +29,6 @@ struct appldata_parameter_list {
 	u64 buffer_addr;
 } __attribute__ ((packed));

-#endif /* CONFIG_64BIT */
-
 struct appldata_product_id {
 	char prod_nr[7];	/* product number */
 	u16  prod_fn;		/* product function */
--- a/arch/s390/include/asm/atomic.h
+++ b/arch/s390/include/asm/atomic.h
@@ -160,8 +160,6 @@ static inline int __atomic_add_unless(atomic_t *v, int a, int u)

 #define ATOMIC64_INIT(i)  { (i) }

-#ifdef CONFIG_64BIT
-
 #define __ATOMIC64_NO_BARRIER	"\n"

 #ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
@@ -274,99 +272,6 @@ static inline long long atomic64_cmpxchg(atomic64_t *v,

 #undef __ATOMIC64_LOOP

-#else /* CONFIG_64BIT */
-
-typedef struct {
-	long long counter;
-} atomic64_t;
-
-static inline long long atomic64_read(const atomic64_t *v)
-{
-	register_pair rp;
-
-	asm volatile(
-		"	lm	%0,%N0,%1"
-		: "=&d" (rp) : "Q" (v->counter)	);
-	return rp.pair;
-}
-
-static inline void atomic64_set(atomic64_t *v, long long i)
-{
-	register_pair rp = {.pair = i};
-
-	asm volatile(
-		"	stm	%1,%N1,%0"
-		: "=Q" (v->counter) : "d" (rp) );
-}
-
-static inline long long atomic64_xchg(atomic64_t *v, long long new)
-{
-	register_pair rp_new = {.pair = new};
-	register_pair rp_old;
-
-	asm volatile(
-		"	lm	%0,%N0,%1\n"
-		"0:	cds	%0,%2,%1\n"
-		"	jl	0b\n"
-		: "=&d" (rp_old), "+Q" (v->counter)
-		: "d" (rp_new)
-		: "cc");
-	return rp_old.pair;
-}
-
-static inline long long atomic64_cmpxchg(atomic64_t *v,
-					 long long old, long long new)
-{
-	register_pair rp_old = {.pair = old};
-	register_pair rp_new = {.pair = new};
-
-	asm volatile(
-		"	cds	%0,%2,%1"
-		: "+&d" (rp_old), "+Q" (v->counter)
-		: "d" (rp_new)
-		: "cc");
-	return rp_old.pair;
-}
-
-
-static inline long long atomic64_add_return(long long i, atomic64_t *v)
-{
-	long long old, new;
-
-	do {
-		old = atomic64_read(v);
-		new = old + i;
-	} while (atomic64_cmpxchg(v, old, new) != old);
-	return new;
-}
-
-static inline void atomic64_set_mask(unsigned long long mask, atomic64_t *v)
-{
-	long long old, new;
-
-	do {
-		old = atomic64_read(v);
-		new = old | mask;
-	} while (atomic64_cmpxchg(v, old, new) != old);
-}
-
-static inline void atomic64_clear_mask(unsigned long long mask, atomic64_t *v)
-{
-	long long old, new;
-
-	do {
-		old = atomic64_read(v);
-		new = old & mask;
-	} while (atomic64_cmpxchg(v, old, new) != old);
-}
-
-static inline void atomic64_add(long long i, atomic64_t *v)
-{
-	atomic64_add_return(i, v);
-}
-
-#endif /* CONFIG_64BIT */
-
 static inline int atomic64_add_unless(atomic64_t *v, long long i, long long u)
 {
 	long long c, old;
--- a/arch/s390/include/asm/bitops.h
+++ b/arch/s390/include/asm/bitops.h
@@ -51,32 +51,6 @@

 #define __BITOPS_NO_BARRIER	"\n"

-#ifndef CONFIG_64BIT
-
-#define __BITOPS_OR		"or"
-#define __BITOPS_AND		"nr"
-#define __BITOPS_XOR		"xr"
-#define __BITOPS_BARRIER	"\n"
-
-#define __BITOPS_LOOP(__addr, __val, __op_string, __barrier)	\
-({								\
-	unsigned long __old, __new;				\
-								\
-	typecheck(unsigned long *, (__addr));			\
-	asm volatile(						\
-		"	l	%0,%2\n"			\
-		"0:	lr	%1,%0\n"			\
-		__op_string "	%1,%3\n"			\
-		"	cs	%0,%1,%2\n"			\
-		"	jl	0b"				\
-		: "=&d" (__old), "=&d" (__new), "+Q" (*(__addr))\
-		: "d" (__val)					\
-		: "cc", "memory");				\
-	__old;							\
-})
-
-#else /* CONFIG_64BIT */
-
 #ifdef CONFIG_HAVE_MARCH_Z196_FEATURES

 #define __BITOPS_OR		"laog"
@@ -125,8 +99,6 @@

 #endif /* CONFIG_HAVE_MARCH_Z196_FEATURES */

-#endif /* CONFIG_64BIT */
-
 #define __BITOPS_WORDS(bits) (((bits) + BITS_PER_LONG - 1) / BITS_PER_LONG)

 static inline unsigned long *
--- a/arch/s390/include/asm/cputime.h
+++ b/arch/s390/include/asm/cputime.h
@@ -22,15 +22,7 @@ typedef unsigned long long __nocast cputime64_t;

 static inline unsigned long __div(unsigned long long n, unsigned long base)
 {
-#ifndef CONFIG_64BIT
-	register_pair rp;
-
-	rp.pair = n >> 1;
-	asm ("dr %0,%1" : "+d" (rp) : "d" (base >> 1));
-	return rp.subreg.odd;
-#else /* CONFIG_64BIT */
 	return n / base;
-#endif /* CONFIG_64BIT */
 }

 #define cputime_one_jiffy		jiffies_to_cputime(1)
@@ -101,17 +93,8 @@ static inline void cputime_to_timespec(const cputime_t cputime,
 				       struct timespec *value)
 {
 	unsigned long long __cputime = (__force unsigned long long) cputime;
-#ifndef CONFIG_64BIT
-	register_pair rp;
-
-	rp.pair = __cputime >> 1;
-	asm ("dr %0,%1" : "+d" (rp) : "d" (CPUTIME_PER_SEC / 2));
-	value->tv_nsec = rp.subreg.even * NSEC_PER_USEC / CPUTIME_PER_USEC;
-	value->tv_sec = rp.subreg.odd;
-#else
 	value->tv_nsec = (__cputime % CPUTIME_PER_SEC) * NSEC_PER_USEC / CPUTIME_PER_USEC;
 	value->tv_sec = __cputime / CPUTIME_PER_SEC;
-#endif
 }

 /*
@@ -129,17 +112,8 @@ static inline void cputime_to_timeval(const cputime_t cputime,
 				      struct timeval *value)
 {
 	unsigned long long __cputime = (__force unsigned long long) cputime;
-#ifndef CONFIG_64BIT
-	register_pair rp;
-
-	rp.pair = __cputime >> 1;
-	asm ("dr %0,%1" : "+d" (rp) : "d" (CPUTIME_PER_USEC / 2));
-	value->tv_usec = rp.subreg.even / CPUTIME_PER_USEC;
-	value->tv_sec = rp.subreg.odd;
-#else
 	value->tv_usec = (__cputime % CPUTIME_PER_SEC) / CPUTIME_PER_USEC;
 	value->tv_sec = __cputime / CPUTIME_PER_SEC;
-#endif
 }

 /*
--- a/arch/s390/include/asm/ctl_reg.h
+++ b/arch/s390/include/asm/ctl_reg.h
@@ -9,20 +9,12 @@

 #include <linux/bug.h>

-#ifdef CONFIG_64BIT
-# define __CTL_LOAD	"lctlg"
-# define __CTL_STORE	"stctg"
-#else
-# define __CTL_LOAD	"lctl"
-# define __CTL_STORE	"stctl"
-#endif
-
 #define __ctl_load(array, low, high) {					\
 	typedef struct { char _[sizeof(array)]; } addrtype;		\
 									\
 	BUILD_BUG_ON(sizeof(addrtype) != (high - low + 1) * sizeof(long));\
 	asm volatile(							\
-		__CTL_LOAD " %1,%2,%0\n"				\
+		"	lctlg	%1,%2,%0\n"				\
 		: : "Q" (*(addrtype *)(&array)), "i" (low), "i" (high));\
 }

@@ -31,7 +23,7 @@
 									\
 	BUILD_BUG_ON(sizeof(addrtype) != (high - low + 1) * sizeof(long));\
 	asm volatile(							\
-		__CTL_STORE " %1,%2,%0\n"				\
+		"	stctg	%1,%2,%0\n"				\
 		: "=Q" (*(addrtype *)(&array))				\
 		: "i" (low), "i" (high));				\
 }
@@ -60,9 +52,7 @@ void smp_ctl_clear_bit(int cr, int bit);
 union ctlreg0 {
 	unsigned long val;
 	struct {
-#ifdef CONFIG_64BIT
 		unsigned long	   : 32;
-#endif
 		unsigned long	   : 3;
 		unsigned long lap  : 1; /* Low-address-protection control */
 		unsigned long	   : 4;
--- a/arch/s390/include/asm/elf.h
+++ b/arch/s390/include/asm/elf.h
@@ -107,11 +107,7 @@
 /*
 * These are used to set parameters in the core dumps.
 */
-#ifndef CONFIG_64BIT
-#define ELF_CLASS	ELFCLASS32
-#else /* CONFIG_64BIT */
 #define ELF_CLASS	ELFCLASS64
-#endif /* CONFIG_64BIT */
 #define ELF_DATA	ELFDATA2MSB
 #define ELF_ARCH	EM_S390

--- a/arch/s390/include/asm/idals.h
+++ b/arch/s390/include/asm/idals.h
@@ -19,11 +19,7 @@
 #include <asm/cio.h>
 #include <asm/uaccess.h>

-#ifdef CONFIG_64BIT
 #define IDA_SIZE_LOG 12 /* 11 for 2k , 12 for 4k */
-#else
-#define IDA_SIZE_LOG 11 /* 11 for 2k , 12 for 4k */
-#endif
 #define IDA_BLOCK_SIZE (1L<<IDA_SIZE_LOG)

 /*
@@ -32,11 +28,7 @@
 static inline int
 idal_is_needed(void *vaddr, unsigned int length)
 {
-#ifdef CONFIG_64BIT
 	return ((__pa(vaddr) + length - 1) >> 31) != 0;
-#else
-	return 0;
-#endif
 }


@@ -77,7 +69,6 @@ static inline unsigned long *idal_create_words(unsigned long *idaws,
 static inline int
 set_normalized_cda(struct ccw1 * ccw, void *vaddr)
 {
-#ifdef CONFIG_64BIT
 	unsigned int nridaws;
 	unsigned long *idal;

@@ -93,7 +84,6 @@ set_normalized_cda(struct ccw1 * ccw, void *vaddr)
 		ccw->flags |= CCW_FLAG_IDA;
 		vaddr = idal;
 	}
-#endif
 	ccw->cda = (__u32)(unsigned long) vaddr;
 	return 0;
 }
@@ -104,12 +94,10 @@ set_normalized_cda(struct ccw1 * ccw, void *vaddr)
 static inline void
 clear_normalized_cda(struct ccw1 * ccw)
 {
-#ifdef CONFIG_64BIT
 	if (ccw->flags & CCW_FLAG_IDA) {
 		kfree((void *)(unsigned long) ccw->cda);
 		ccw->flags &= ~CCW_FLAG_IDA;
 	}
-#endif
 	ccw->cda = 0;
 }

@@ -181,12 +169,8 @@ idal_buffer_free(struct idal_buffer *ib)
 static inline int
 __idal_buffer_is_needed(struct idal_buffer *ib)
 {
-#ifdef CONFIG_64BIT
 	return ib->size > (4096ul << ib->page_order) ||
 		idal_is_needed(ib->data[0], ib->size);
-#else
-	return ib->size > (4096ul << ib->page_order);
-#endif
 }

 /*
--- a/arch/s390/include/asm/jump_label.h
+++ b/arch/s390/include/asm/jump_label.h
@@ -6,14 +6,6 @@
 #define JUMP_LABEL_NOP_SIZE 6
 #define JUMP_LABEL_NOP_OFFSET 2

-#ifdef CONFIG_64BIT
-#define ASM_PTR ".quad"
-#define ASM_ALIGN ".balign 8"
-#else
-#define ASM_PTR ".long"
-#define ASM_ALIGN ".balign 4"
-#endif
-
 /*
 * We use a brcl 0,2 instruction for jump labels at compile time so it
 * can be easily distinguished from a hotpatch generated instruction.
@@ -22,8 +14,8 @@ static __always_inline bool arch_static_branch(struct static_key *key)
 {
 	asm_volatile_goto("0:	brcl 0,"__stringify(JUMP_LABEL_NOP_OFFSET)"\n"
 		".pushsection __jump_table, \"aw\"\n"
-		ASM_ALIGN "\n"
-		ASM_PTR " 0b, %l[label], %0\n"
+		".balign 8\n"
+		".quad 0b, %l[label], %0\n"
 		".popsection\n"
 		: : "X" (key) : : label);
 	return false;
--- a/arch/s390/include/asm/lowcore.h
+++ b/arch/s390/include/asm/lowcore.h
@@ -13,163 +13,6 @@
 #include <asm/cpu.h>
 #include <asm/types.h>

-#ifdef CONFIG_32BIT
-
-#define LC_ORDER 0
-#define LC_PAGES 1
-
-struct save_area {
-	u32	ext_save;
-	u64	timer;
-	u64	clk_cmp;
-	u8	pad1[24];
-	u8	psw[8];
-	u32	pref_reg;
-	u8	pad2[20];
-	u32	acc_regs[16];
-	u64	fp_regs[4];
-	u32	gp_regs[16];
-	u32	ctrl_regs[16];
-} __packed;
-
-struct save_area_ext {
-	struct save_area	sa;
-	__vector128		vx_regs[32];
-};
-
-struct _lowcore {
-	psw_t	restart_psw;			/* 0x0000 */
-	psw_t	restart_old_psw;		/* 0x0008 */
-	__u8	pad_0x0010[0x0014-0x0010];	/* 0x0010 */
-	__u32	ipl_parmblock_ptr;		/* 0x0014 */
-	psw_t	external_old_psw;		/* 0x0018 */
-	psw_t	svc_old_psw;			/* 0x0020 */
-	psw_t	program_old_psw;		/* 0x0028 */
-	psw_t	mcck_old_psw;			/* 0x0030 */
-	psw_t	io_old_psw;			/* 0x0038 */
-	__u8	pad_0x0040[0x0058-0x0040];	/* 0x0040 */
-	psw_t	external_new_psw;		/* 0x0058 */
-	psw_t	svc_new_psw;			/* 0x0060 */
-	psw_t	program_new_psw;		/* 0x0068 */
-	psw_t	mcck_new_psw;			/* 0x0070 */
-	psw_t	io_new_psw;			/* 0x0078 */
-	__u32	ext_params;			/* 0x0080 */
-	__u16	ext_cpu_addr;			/* 0x0084 */
-	__u16	ext_int_code;			/* 0x0086 */
-	__u16	svc_ilc;			/* 0x0088 */
-	__u16	svc_code;			/* 0x008a */
-	__u16	pgm_ilc;			/* 0x008c */
-	__u16	pgm_code;			/* 0x008e */
-	__u32	trans_exc_code;			/* 0x0090 */
-	__u16	mon_class_num;			/* 0x0094 */
-	__u8	per_code;			/* 0x0096 */
-	__u8	per_atmid;			/* 0x0097 */
-	__u32	per_address;			/* 0x0098 */
-	__u32	monitor_code;			/* 0x009c */
-	__u8	exc_access_id;			/* 0x00a0 */
-	__u8	per_access_id;			/* 0x00a1 */
-	__u8	op_access_id;			/* 0x00a2 */
-	__u8	ar_mode_id;			/* 0x00a3 */
-	__u8	pad_0x00a4[0x00b8-0x00a4];	/* 0x00a4 */
-	__u16	subchannel_id;			/* 0x00b8 */
-	__u16	subchannel_nr;			/* 0x00ba */
-	__u32	io_int_parm;			/* 0x00bc */
-	__u32	io_int_word;			/* 0x00c0 */
-	__u8	pad_0x00c4[0x00c8-0x00c4];	/* 0x00c4 */
-	__u32	stfl_fac_list;			/* 0x00c8 */
-	__u8	pad_0x00cc[0x00d4-0x00cc];	/* 0x00cc */
-	__u32	extended_save_area_addr;	/* 0x00d4 */
-	__u32	cpu_timer_save_area[2];		/* 0x00d8 */
-	__u32	clock_comp_save_area[2];	/* 0x00e0 */
-	__u32	mcck_interruption_code[2];	/* 0x00e8 */
-	__u8	pad_0x00f0[0x00f4-0x00f0];	/* 0x00f0 */
-	__u32	external_damage_code;		/* 0x00f4 */
-	__u32	failing_storage_address;	/* 0x00f8 */
-	__u8	pad_0x00fc[0x0100-0x00fc];	/* 0x00fc */
-	psw_t	psw_save_area;			/* 0x0100 */
-	__u32	prefixreg_save_area;		/* 0x0108 */
-	__u8	pad_0x010c[0x0120-0x010c];	/* 0x010c */
-
-	/* CPU register save area: defined by architecture */
-	__u32	access_regs_save_area[16];	/* 0x0120 */
-	__u32	floating_pt_save_area[8];	/* 0x0160 */
-	__u32	gpregs_save_area[16];		/* 0x0180 */
-	__u32	cregs_save_area[16];		/* 0x01c0 */
-
-	/* Save areas. */
-	__u32	save_area_sync[8];		/* 0x0200 */
-	__u32	save_area_async[8];		/* 0x0220 */
-	__u32	save_area_restart[1];		/* 0x0240 */
-
-	/* CPU flags. */
-	__u32	cpu_flags;			/* 0x0244 */
-
-	/* Return psws. */
-	psw_t	return_psw;			/* 0x0248 */
-	psw_t	return_mcck_psw;		/* 0x0250 */
-
-	/* CPU time accounting values */
-	__u64	sync_enter_timer;		/* 0x0258 */
-	__u64	async_enter_timer;		/* 0x0260 */
-	__u64	mcck_enter_timer;		/* 0x0268 */
-	__u64	exit_timer;			/* 0x0270 */
-	__u64	user_timer;			/* 0x0278 */
-	__u64	system_timer;			/* 0x0280 */
-	__u64	steal_timer;			/* 0x0288 */
-	__u64	last_update_timer;		/* 0x0290 */
-	__u64	last_update_clock;		/* 0x0298 */
-	__u64	int_clock;			/* 0x02a0 */
-	__u64	mcck_clock;			/* 0x02a8 */
-	__u64	clock_comparator;		/* 0x02b0 */
-
-	/* Current process. */
-	__u32	current_task;			/* 0x02b8 */
-	__u32	thread_info;			/* 0x02bc */
-	__u32	kernel_stack;			/* 0x02c0 */
-
-	/* Interrupt, panic and restart stack. */
-	__u32	async_stack;			/* 0x02c4 */
-	__u32	panic_stack;			/* 0x02c8 */
-	__u32	restart_stack;			/* 0x02cc */
-
-	/* Restart function and parameter. */
-	__u32	restart_fn;			/* 0x02d0 */
-	__u32	restart_data;			/* 0x02d4 */
-	__u32	restart_source;			/* 0x02d8 */
-
-	/* Address space pointer. */
-	__u32	kernel_asce;			/* 0x02dc */
-	__u32	user_asce;			/* 0x02e0 */
-	__u32	current_pid;			/* 0x02e4 */
-
-	/* SMP info area */
-	__u32	cpu_nr;				/* 0x02e8 */
-	__u32	softirq_pending;		/* 0x02ec */
-	__u32	percpu_offset;			/* 0x02f0 */
-	__u32	machine_flags;			/* 0x02f4 */
-	__u8	pad_0x02f8[0x02fc-0x02f8];	/* 0x02f8 */
-	__u32	spinlock_lockval;		/* 0x02fc */
-
-	__u8	pad_0x0300[0x0e00-0x0300];	/* 0x0300 */
-
-	/*
-	 * 0xe00 contains the address of the IPL Parameter Information
-	 * block. Dump tools need IPIB for IPL after dump.
-	 * Note: do not change the position of any fields in 0x0e00-0x0f00
-	 */
-	__u32	ipib;				/* 0x0e00 */
-	__u32	ipib_checksum;			/* 0x0e04 */
-	__u32	vmcore_info;			/* 0x0e08 */
-	__u8	pad_0x0e0c[0x0e18-0x0e0c];	/* 0x0e0c */
-	__u32	os_info;			/* 0x0e18 */
-	__u8	pad_0x0e1c[0x0f00-0x0e1c];	/* 0x0e1c */
-
-	/* Extended facility list */
-	__u64	stfle_fac_list[32];		/* 0x0f00 */
-} __packed;
-
-#else /* CONFIG_32BIT */
-
 #define LC_ORDER 1
 #define LC_PAGES 2

@@ -354,8 +197,6 @@ struct _lowcore {
 	__u8	vector_save_area[1024];		/* 0x1c00 */
 } __packed;

-#endif /* CONFIG_32BIT */
-
 #define S390_lowcore (*((struct _lowcore *) 0))

 extern struct _lowcore *lowcore_ptr[];
--- a/arch/s390/include/asm/mman.h
+++ b/arch/s390/include/asm/mman.h
@@ -8,7 +8,7 @@

 #include <uapi/asm/mman.h>

-#if !defined(__ASSEMBLY__) && defined(CONFIG_64BIT)
+#ifndef __ASSEMBLY__
 int s390_mmap_check(unsigned long addr, unsigned long len, unsigned long flags);
 #define arch_mmap_check(addr, len, flags) s390_mmap_check(addr, len, flags)
 #endif
--- a/arch/s390/include/asm/mmu_context.h
+++ b/arch/s390/include/asm/mmu_context.h
@@ -19,9 +19,7 @@ static inline int init_new_context(struct task_struct *tsk,
 	atomic_set(&mm->context.attach_count, 0);
 	mm->context.flush_mm = 0;
 	mm->context.asce_bits = _ASCE_TABLE_LENGTH | _ASCE_USER_BITS;
-#ifdef CONFIG_64BIT
 	mm->context.asce_bits |= _ASCE_TYPE_REGION3;
-#endif
 	mm->context.has_pgste = 0;
 	mm->context.use_skey = 0;
 	mm->context.asce_limit = STACK_TOP_MAX;
@@ -110,10 +108,8 @@ static inline void activate_mm(struct mm_struct *prev,
 static inline void arch_dup_mmap(struct mm_struct *oldmm,
 				 struct mm_struct *mm)
 {
-#ifdef CONFIG_64BIT
 	if (oldmm->context.asce_limit < mm->context.asce_limit)
 		crst_table_downgrade(mm, oldmm->context.asce_limit);
-#endif
 }

 static inline void arch_exit_mmap(struct mm_struct *mm)
--- a/arch/s390/include/asm/percpu.h
+++ b/arch/s390/include/asm/percpu.h
@@ -10,8 +10,6 @@
 */
 #define __my_cpu_offset S390_lowcore.percpu_offset

-#ifdef CONFIG_64BIT
-
 /*
 * For 64 bit module code, the module may be more than 4G above the
 * per cpu area, use weak definitions to force the compiler to
@@ -183,8 +181,6 @@
 #define this_cpu_cmpxchg_double_4 arch_this_cpu_cmpxchg_double
 #define this_cpu_cmpxchg_double_8 arch_this_cpu_cmpxchg_double

-#endif /* CONFIG_64BIT */
-
 #include <asm-generic/percpu.h>

 #endif /* __ARCH_S390_PERCPU__ */
--- a/arch/s390/include/asm/perf_event.h
+++ b/arch/s390/include/asm/perf_event.h
@@ -9,8 +9,6 @@
 #ifndef _ASM_S390_PERF_EVENT_H
 #define _ASM_S390_PERF_EVENT_H

-#ifdef CONFIG_64BIT
-
 #include <linux/perf_event.h>
 #include <linux/device.h>
 #include <asm/cpu_mf.h>
@@ -92,5 +90,4 @@ struct sf_raw_sample {
 int perf_reserve_sampling(void);
 void perf_release_sampling(void);

-#endif /* CONFIG_64BIT */
 #endif /* _ASM_S390_PERF_EVENT_H */
--- a/Show More
+++ b/Show More