17 files changed, 80 insertions, 89 deletions

diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile
index 7434c32bc631..4865e4b49464 100644
--- a/arch/s390/kernel/Makefile
+++ b/arch/s390/kernel/Makefile
@@ -8,31 +8,26 @@ obj-y	:=  bitmap.o traps.o time.o process.o \
             setup.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o \
             semaphore.o s390_ext.o debug.o profile.o irq.o reipl_diag.o
 
+obj-y   += $(if $(CONFIG_64BIT),entry64.o,entry.o)
+obj-y   += $(if $(CONFIG_64BIT),reipl64.o,reipl.o)
+
 extra-y                         += head.o init_task.o vmlinux.lds
 
 obj-$(CONFIG_MODULES)           += s390_ksyms.o module.o
 obj-$(CONFIG_SMP)               += smp.o
 
-obj-$(CONFIG_S390_SUPPORT)      += compat_linux.o compat_signal.o \
+obj-$(CONFIG_COMPAT)            += compat_linux.o compat_signal.o \
                                         compat_ioctl.o compat_wrapper.o \
                                         compat_exec_domain.o
 obj-$(CONFIG_BINFMT_ELF32)      += binfmt_elf32.o
 
-obj-$(CONFIG_ARCH_S390_31)      += entry.o reipl.o
-obj-$(CONFIG_ARCH_S390X)        += entry64.o reipl64.o
-
 obj-$(CONFIG_VIRT_TIMER)        += vtime.o
 
 # Kexec part
 S390_KEXEC_OBJS := machine_kexec.o crash.o
-ifeq ($(CONFIG_ARCH_S390X),y)
-S390_KEXEC_OBJS += relocate_kernel64.o
-else
-S390_KEXEC_OBJS += relocate_kernel.o
-endif
+S390_KEXEC_OBJS += $(if $(CONFIG_64BIT),relocate_kernel64.o,relocate_kernel.o)
 obj-$(CONFIG_KEXEC) += $(S390_KEXEC_OBJS)
 
-
 #
 # This is just to get the dependencies...
 #
diff --git a/arch/s390/kernel/compat_linux.c b/arch/s390/kernel/compat_linux.c
index ed877d0f27e6..41b197a3f3a3 100644
--- a/arch/s390/kernel/compat_linux.c
+++ b/arch/s390/kernel/compat_linux.c
@@ -279,7 +279,7 @@ asmlinkage long sys32_getegid16(void)
 
 static inline long get_tv32(struct timeval *o, struct compat_timeval *i)
 {
-        return (!access_ok(VERIFY_READ, tv32, sizeof(*tv32)) ||
+        return (!access_ok(VERIFY_READ, o, sizeof(*o)) ||
                 (__get_user(o->tv_sec, &i->tv_sec) ||
                  __get_user(o->tv_usec, &i->tv_usec)));
 }
diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c
index 4ff6808456ea..fa2b3bc22f20 100644
--- a/arch/s390/kernel/compat_signal.c
+++ b/arch/s390/kernel/compat_signal.c
@@ -467,8 +467,6 @@ asmlinkage long sys32_rt_sigreturn(struct pt_regs *regs)
         if (err)
                 goto badframe; 
 
-        /* It is more difficult to avoid calling this function than to
-           call it and ignore errors.  */
         set_fs (KERNEL_DS);
         do_sigaltstack((stack_t __user *)&st, NULL, regs->gprs[15]);
         set_fs (old_fs);
diff --git a/arch/s390/kernel/cpcmd.c b/arch/s390/kernel/cpcmd.c
index d47fecb42cc5..4ef44e536b2c 100644
--- a/arch/s390/kernel/cpcmd.c
+++ b/arch/s390/kernel/cpcmd.c
@@ -39,7 +39,7 @@ int  __cpcmd(const char *cmd, char *response, int rlen, int *response_code)
 
         if (response != NULL && rlen > 0) {
                 memset(response, 0, rlen);
-#ifndef CONFIG_ARCH_S390X
+#ifndef CONFIG_64BIT
                 asm volatile (  "lra    2,0(%2)\n"
                                 "lr     4,%3\n"
                                 "o      4,%6\n"
@@ -55,7 +55,7 @@ int  __cpcmd(const char *cmd, char *response, int rlen, int *response_code)
                                 : "a" (cpcmd_buf), "d" (cmdlen),
                                 "a" (response), "d" (rlen), "m" (mask)
                                 : "cc", "2", "3", "4", "5" );
-#else /* CONFIG_ARCH_S390X */
+#else /* CONFIG_64BIT */
                 asm volatile (  "lrag   2,0(%2)\n"
                                 "lgr    4,%3\n"
                                 "o      4,%6\n"
@@ -73,11 +73,11 @@ int  __cpcmd(const char *cmd, char *response, int rlen, int *response_code)
                                 : "a" (cpcmd_buf), "d" (cmdlen),
                                 "a" (response), "d" (rlen), "m" (mask)
                                 : "cc", "2", "3", "4", "5" );
-#endif /* CONFIG_ARCH_S390X */
+#endif /* CONFIG_64BIT */
                 EBCASC(response, rlen);
         } else {
                 return_len = 0;
-#ifndef CONFIG_ARCH_S390X
+#ifndef CONFIG_64BIT
                 asm volatile (  "lra    2,0(%1)\n"
                                 "lr     3,%2\n"
                                 "diag   2,3,0x8\n"
@@ -85,7 +85,7 @@ int  __cpcmd(const char *cmd, char *response, int rlen, int *response_code)
                                 : "=d" (return_code)
                                 : "a" (cpcmd_buf), "d" (cmdlen)
                                 : "2", "3"  );
-#else /* CONFIG_ARCH_S390X */
+#else /* CONFIG_64BIT */
                 asm volatile (  "lrag   2,0(%1)\n"
                                 "lgr    3,%2\n"
                                 "sam31\n"
@@ -95,7 +95,7 @@ int  __cpcmd(const char *cmd, char *response, int rlen, int *response_code)
                                 : "=d" (return_code)
                                 : "a" (cpcmd_buf), "d" (cmdlen)
                                 : "2", "3" );
-#endif /* CONFIG_ARCH_S390X */
+#endif /* CONFIG_64BIT */
         }
         spin_unlock_irqrestore(&cpcmd_lock, flags);
         if (response_code != NULL)
@@ -105,7 +105,7 @@ int  __cpcmd(const char *cmd, char *response, int rlen, int *response_code)
 
 EXPORT_SYMBOL(__cpcmd);
 
-#ifdef CONFIG_ARCH_S390X
+#ifdef CONFIG_64BIT
 int cpcmd(const char *cmd, char *response, int rlen, int *response_code)
 {
         char *lowbuf;
@@ -129,4 +129,4 @@ int cpcmd(const char *cmd, char *response, int rlen, int *response_code)
 }
 
 EXPORT_SYMBOL(cpcmd);
-#endif          /* CONFIG_ARCH_S390X */
+#endif          /* CONFIG_64BIT */
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
index 4eb71ffcf484..369ab4413ec7 100644
--- a/arch/s390/kernel/entry64.S
+++ b/arch/s390/kernel/entry64.S
@@ -213,7 +213,7 @@ sysc_nr_ok:
         mvc     SP_ARGS(8,%r15),SP_R7(%r15)
 sysc_do_restart:
         larl    %r10,sys_call_table
-#ifdef CONFIG_S390_SUPPORT
+#ifdef CONFIG_COMPAT
         tm      __TI_flags+5(%r9),(_TIF_31BIT>>16)  # running in 31 bit mode ?
         jno     sysc_noemu
         larl    %r10,sys_call_table_emu  # use 31 bit emulation system calls
@@ -361,7 +361,7 @@ sys_clone_glue:
         la      %r2,SP_PTREGS(%r15)    # load pt_regs
         jg      sys_clone              # branch to sys_clone
 
-#ifdef CONFIG_S390_SUPPORT
+#ifdef CONFIG_COMPAT
 sys32_clone_glue: 
         la      %r2,SP_PTREGS(%r15)    # load pt_regs
         jg      sys32_clone            # branch to sys32_clone
@@ -383,7 +383,7 @@ sys_execve_glue:
         bnz     0(%r12)               # it did fail -> store result in gpr2
         b       6(%r12)               # SKIP STG 2,SP_R2(15) in
                                       # system_call/sysc_tracesys
-#ifdef CONFIG_S390_SUPPORT
+#ifdef CONFIG_COMPAT
 sys32_execve_glue:        
         la      %r2,SP_PTREGS(%r15)   # load pt_regs
         lgr     %r12,%r14             # save return address
@@ -398,7 +398,7 @@ sys_sigreturn_glue:
         la      %r2,SP_PTREGS(%r15)   # load pt_regs as parameter
         jg      sys_sigreturn         # branch to sys_sigreturn
 
-#ifdef CONFIG_S390_SUPPORT
+#ifdef CONFIG_COMPAT
 sys32_sigreturn_glue:     
         la      %r2,SP_PTREGS(%r15)   # load pt_regs as parameter
         jg      sys32_sigreturn       # branch to sys32_sigreturn
@@ -408,7 +408,7 @@ sys_rt_sigreturn_glue:
         la      %r2,SP_PTREGS(%r15)   # load pt_regs as parameter
         jg      sys_rt_sigreturn      # branch to sys_sigreturn
 
-#ifdef CONFIG_S390_SUPPORT
+#ifdef CONFIG_COMPAT
 sys32_rt_sigreturn_glue:     
         la      %r2,SP_PTREGS(%r15)   # load pt_regs as parameter
         jg      sys32_rt_sigreturn    # branch to sys32_sigreturn
@@ -429,7 +429,7 @@ sys_sigsuspend_glue:
         la      %r14,6(%r14)          # skip store of return value
         jg      sys_sigsuspend        # branch to sys_sigsuspend
 
-#ifdef CONFIG_S390_SUPPORT
+#ifdef CONFIG_COMPAT
 sys32_sigsuspend_glue:    
         llgfr   %r4,%r4               # unsigned long                   
         lgr     %r5,%r4               # move mask back
@@ -449,7 +449,7 @@ sys_rt_sigsuspend_glue:
         la      %r14,6(%r14)          # skip store of return value
         jg      sys_rt_sigsuspend     # branch to sys_rt_sigsuspend
 
-#ifdef CONFIG_S390_SUPPORT
+#ifdef CONFIG_COMPAT
 sys32_rt_sigsuspend_glue: 
         llgfr   %r3,%r3               # size_t                  
         lgr     %r4,%r3               # move sigsetsize parameter
@@ -464,7 +464,7 @@ sys_sigaltstack_glue:
         la      %r4,SP_PTREGS(%r15)   # load pt_regs as parameter
         jg      sys_sigaltstack       # branch to sys_sigreturn
 
-#ifdef CONFIG_S390_SUPPORT
+#ifdef CONFIG_COMPAT
 sys32_sigaltstack_glue:
         la      %r4,SP_PTREGS(%r15)   # load pt_regs as parameter
         jg      sys32_sigaltstack_wrapper # branch to sys_sigreturn
@@ -1009,7 +1009,7 @@ sys_call_table:
 #include "syscalls.S"
 #undef SYSCALL
 
-#ifdef CONFIG_S390_SUPPORT
+#ifdef CONFIG_COMPAT
 
 #define SYSCALL(esa,esame,emu)  .long emu
         .globl  sys_call_table_emu
diff --git a/arch/s390/kernel/head.S b/arch/s390/kernel/head.S
index d31a97c89f68..ea88d066bf04 100644
--- a/arch/s390/kernel/head.S
+++ b/arch/s390/kernel/head.S
@@ -30,7 +30,7 @@
 #include <asm/thread_info.h>
 #include <asm/page.h>
 
-#ifdef CONFIG_ARCH_S390X
+#ifdef CONFIG_64BIT
 #define ARCH_OFFSET     4
 #else
 #define ARCH_OFFSET     0
@@ -539,7 +539,7 @@ ipl_devno:
         .word 0
 .endm
 
-#ifdef CONFIG_ARCH_S390X
+#ifdef CONFIG_64BIT
 #include "head64.S"
 #else
 #include "head31.S"
diff --git a/arch/s390/kernel/machine_kexec.c b/arch/s390/kernel/machine_kexec.c
index 5aa71b05b8ae..f0ed5c642c74 100644
--- a/arch/s390/kernel/machine_kexec.c
+++ b/arch/s390/kernel/machine_kexec.c
@@ -85,7 +85,7 @@ kexec_halt_all_cpus(void *kernel_image)
                 pfault_fini();
 #endif
 
-        if (atomic_compare_and_swap(-1, smp_processor_id(), &cpuid))
+        if (atomic_cmpxchg(&cpuid, -1, smp_processor_id()) != -1)
                 signal_processor(smp_processor_id(), sigp_stop);
 
         /* Wait for all other cpus to enter stopped state */
diff --git a/arch/s390/kernel/module.c b/arch/s390/kernel/module.c
index 607d506689c8..c271cdab58e2 100644
--- a/arch/s390/kernel/module.c
+++ b/arch/s390/kernel/module.c
@@ -37,11 +37,11 @@
 #define DEBUGP(fmt , ...)
 #endif
 
-#ifndef CONFIG_ARCH_S390X
+#ifndef CONFIG_64BIT
 #define PLT_ENTRY_SIZE 12
-#else /* CONFIG_ARCH_S390X */
+#else /* CONFIG_64BIT */
 #define PLT_ENTRY_SIZE 20
-#endif /* CONFIG_ARCH_S390X */
+#endif /* CONFIG_64BIT */
 
 void *module_alloc(unsigned long size)
 {
@@ -294,17 +294,17 @@ apply_rela(Elf_Rela *rela, Elf_Addr base, Elf_Sym *symtab,
                         unsigned int *ip;
                         ip = me->module_core + me->arch.plt_offset +
                                 info->plt_offset;
-#ifndef CONFIG_ARCH_S390X
+#ifndef CONFIG_64BIT
                         ip[0] = 0x0d105810; /* basr 1,0; l 1,6(1); br 1 */
                         ip[1] = 0x100607f1;
                         ip[2] = val;
-#else /* CONFIG_ARCH_S390X */
+#else /* CONFIG_64BIT */
                         ip[0] = 0x0d10e310; /* basr 1,0; lg 1,10(1); br 1 */
                         ip[1] = 0x100a0004;
                         ip[2] = 0x07f10000;
                         ip[3] = (unsigned int) (val >> 32);
                         ip[4] = (unsigned int) val;
-#endif /* CONFIG_ARCH_S390X */
+#endif /* CONFIG_64BIT */
                         info->plt_initialized = 1;
                 }
                 if (r_type == R_390_PLTOFF16 ||
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index 78b64fe5e7c2..a942bf2d58e9 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -235,7 +235,7 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long new_stackp,
         /* Save access registers to new thread structure. */
         save_access_regs(&p->thread.acrs[0]);
 
-#ifndef CONFIG_ARCH_S390X
+#ifndef CONFIG_64BIT
         /*
          * save fprs to current->thread.fp_regs to merge them with
          * the emulated registers and then copy the result to the child.
@@ -247,7 +247,7 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long new_stackp,
         /* Set a new TLS ?  */
         if (clone_flags & CLONE_SETTLS)
                 p->thread.acrs[0] = regs->gprs[6];
-#else /* CONFIG_ARCH_S390X */
+#else /* CONFIG_64BIT */
         /* Save the fpu registers to new thread structure. */
         save_fp_regs(&p->thread.fp_regs);
         p->thread.user_seg = __pa((unsigned long) p->mm->pgd) | _REGION_TABLE;
@@ -260,7 +260,7 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long new_stackp,
                         p->thread.acrs[1] = (unsigned int) regs->gprs[6];
                 }
         }
-#endif /* CONFIG_ARCH_S390X */
+#endif /* CONFIG_64BIT */
         /* start new process with ar4 pointing to the correct address space */
         p->thread.mm_segment = get_fs();
         /* Don't copy debug registers */
@@ -339,16 +339,16 @@ out:
  */
 int dump_fpu (struct pt_regs * regs, s390_fp_regs *fpregs)
 {
-#ifndef CONFIG_ARCH_S390X
+#ifndef CONFIG_64BIT
         /*
          * save fprs to current->thread.fp_regs to merge them with
          * the emulated registers and then copy the result to the dump.
          */
         save_fp_regs(&current->thread.fp_regs);
         memcpy(fpregs, &current->thread.fp_regs, sizeof(s390_fp_regs));
-#else /* CONFIG_ARCH_S390X */
+#else /* CONFIG_64BIT */
         save_fp_regs(fpregs);
-#endif /* CONFIG_ARCH_S390X */
+#endif /* CONFIG_64BIT */
         return 1;
 }
 
diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index 06afa3103ace..8ecda6d66de4 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -42,7 +42,7 @@
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
 
-#ifdef CONFIG_S390_SUPPORT
+#ifdef CONFIG_COMPAT
 #include "compat_ptrace.h"
 #endif
 
@@ -59,7 +59,7 @@ FixPerRegisters(struct task_struct *task)
         
         if (per_info->single_step) {
                 per_info->control_regs.bits.starting_addr = 0;
-#ifdef CONFIG_S390_SUPPORT
+#ifdef CONFIG_COMPAT
                 if (test_thread_flag(TIF_31BIT))
                         per_info->control_regs.bits.ending_addr = 0x7fffffffUL;
                 else
@@ -112,7 +112,7 @@ ptrace_disable(struct task_struct *child)
         clear_single_step(child);
 }
 
-#ifndef CONFIG_ARCH_S390X
+#ifndef CONFIG_64BIT
 # define __ADDR_MASK 3
 #else
 # define __ADDR_MASK 7
@@ -138,7 +138,7 @@ peek_user(struct task_struct *child, addr_t addr, addr_t data)
          * an alignment of 4. Programmers from hell...
          */
         mask = __ADDR_MASK;
-#ifdef CONFIG_ARCH_S390X
+#ifdef CONFIG_64BIT
         if (addr >= (addr_t) &dummy->regs.acrs &&
             addr < (addr_t) &dummy->regs.orig_gpr2)
                 mask = 3;
@@ -160,7 +160,7 @@ peek_user(struct task_struct *child, addr_t addr, addr_t data)
                  * access registers are stored in the thread structure
                  */
                 offset = addr - (addr_t) &dummy->regs.acrs;
-#ifdef CONFIG_ARCH_S390X
+#ifdef CONFIG_64BIT
                 /*
                  * Very special case: old & broken 64 bit gdb reading
                  * from acrs[15]. Result is a 64 bit value. Read the
@@ -218,7 +218,7 @@ poke_user(struct task_struct *child, addr_t addr, addr_t data)
          * an alignment of 4. Programmers from hell indeed...
          */
         mask = __ADDR_MASK;
-#ifdef CONFIG_ARCH_S390X
+#ifdef CONFIG_64BIT
         if (addr >= (addr_t) &dummy->regs.acrs &&
             addr < (addr_t) &dummy->regs.orig_gpr2)
                 mask = 3;
@@ -231,13 +231,13 @@ poke_user(struct task_struct *child, addr_t addr, addr_t data)
                  * psw and gprs are stored on the stack
                  */
                 if (addr == (addr_t) &dummy->regs.psw.mask &&
-#ifdef CONFIG_S390_SUPPORT
+#ifdef CONFIG_COMPAT
                     data != PSW_MASK_MERGE(PSW_USER32_BITS, data) &&
 #endif
                     data != PSW_MASK_MERGE(PSW_USER_BITS, data))
                         /* Invalid psw mask. */
                         return -EINVAL;
-#ifndef CONFIG_ARCH_S390X
+#ifndef CONFIG_64BIT
                 if (addr == (addr_t) &dummy->regs.psw.addr)
                         /* I'd like to reject addresses without the
                            high order bit but older gdb's rely on it */
@@ -250,7 +250,7 @@ poke_user(struct task_struct *child, addr_t addr, addr_t data)
                  * access registers are stored in the thread structure
                  */
                 offset = addr - (addr_t) &dummy->regs.acrs;
-#ifdef CONFIG_ARCH_S390X
+#ifdef CONFIG_64BIT
                 /*
                  * Very special case: old & broken 64 bit gdb writing
                  * to acrs[15] with a 64 bit value. Ignore the lower
@@ -357,7 +357,7 @@ do_ptrace_normal(struct task_struct *child, long request, long addr, long data)
         return ptrace_request(child, request, addr, data);
 }
 
-#ifdef CONFIG_S390_SUPPORT
+#ifdef CONFIG_COMPAT
 /*
  * Now the fun part starts... a 31 bit program running in the
  * 31 bit emulation tracing another program. PTRACE_PEEKTEXT,
@@ -629,7 +629,7 @@ do_ptrace(struct task_struct *child, long request, long addr, long data)
                         return peek_user(child, addr, data);
                 if (request == PTRACE_POKEUSR && addr == PT_IEEE_IP)
                         return poke_user(child, addr, data);
-#ifdef CONFIG_S390_SUPPORT
+#ifdef CONFIG_COMPAT
                 if (request == PTRACE_PEEKUSR &&
                     addr == PT32_IEEE_IP && test_thread_flag(TIF_31BIT))
                         return peek_user_emu31(child, addr, data);
@@ -695,7 +695,7 @@ do_ptrace(struct task_struct *child, long request, long addr, long data)
 
         /* Do requests that differ for 31/64 bit */
         default:
-#ifdef CONFIG_S390_SUPPORT
+#ifdef CONFIG_COMPAT
                 if (test_thread_flag(TIF_31BIT))
                         return do_ptrace_emu31(child, request, addr, data);
 #endif
diff --git a/arch/s390/kernel/reipl_diag.c b/arch/s390/kernel/reipl_diag.c
index 83cb42bc0b76..1f33951ba439 100644
--- a/arch/s390/kernel/reipl_diag.c
+++ b/arch/s390/kernel/reipl_diag.c
@@ -26,7 +26,7 @@ void reipl_diag(void)
                 "   st   %%r4,%0\n"
                 "   st   %%r5,%1\n"
                 ".section __ex_table,\"a\"\n"
-#ifdef __s390x__
+#ifdef CONFIG_64BIT
                 "   .align 8\n"
                 "   .quad 0b, 0b\n"
 #else
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 31e7b19348b7..b03847d100d9 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -427,7 +427,7 @@ setup_lowcore(void)
                 __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE;
         lc->current_task = (unsigned long) init_thread_union.thread_info.task;
         lc->thread_info = (unsigned long) &init_thread_union;
-#ifndef CONFIG_ARCH_S390X
+#ifndef CONFIG_64BIT
         if (MACHINE_HAS_IEEE) {
                 lc->extended_save_area_addr = (__u32)
                         __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0);
@@ -562,21 +562,21 @@ setup_arch(char **cmdline_p)
         /*
          * print what head.S has found out about the machine
          */
-#ifndef CONFIG_ARCH_S390X
+#ifndef CONFIG_64BIT
         printk((MACHINE_IS_VM) ?
                "We are running under VM (31 bit mode)\n" :
                "We are running native (31 bit mode)\n");
         printk((MACHINE_HAS_IEEE) ?
                "This machine has an IEEE fpu\n" :
                "This machine has no IEEE fpu\n");
-#else /* CONFIG_ARCH_S390X */
+#else /* CONFIG_64BIT */
         printk((MACHINE_IS_VM) ?
                "We are running under VM (64 bit mode)\n" :
                "We are running native (64 bit mode)\n");
-#endif /* CONFIG_ARCH_S390X */
+#endif /* CONFIG_64BIT */
 
         ROOT_DEV = Root_RAM0;
-#ifndef CONFIG_ARCH_S390X
+#ifndef CONFIG_64BIT
         memory_end = memory_size & ~0x400000UL;  /* align memory end to 4MB */
         /*
          * We need some free virtual space to be able to do vmalloc.
@@ -585,9 +585,9 @@ setup_arch(char **cmdline_p)
          */
         if (memory_end > 1920*1024*1024)
                 memory_end = 1920*1024*1024;
-#else /* CONFIG_ARCH_S390X */
+#else /* CONFIG_64BIT */
         memory_end = memory_size & ~0x200000UL;  /* detected in head.s */
-#endif /* CONFIG_ARCH_S390X */
+#endif /* CONFIG_64BIT */
 
         init_mm.start_code = PAGE_OFFSET;
         init_mm.end_code = (unsigned long) &_etext;
diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c
index 6e0110d71191..6ae4a77270b5 100644
--- a/arch/s390/kernel/signal.c
+++ b/arch/s390/kernel/signal.c
@@ -254,9 +254,9 @@ asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
         if (restore_sigregs(regs, &frame->uc.uc_mcontext))
                 goto badframe;
 
-        /* It is more difficult to avoid calling this function than to
-           call it and ignore errors.  */
-        do_sigaltstack(&frame->uc.uc_stack, NULL, regs->gprs[15]);
+        if (do_sigaltstack(&frame->uc.uc_stack, NULL,
+                           regs->gprs[15]) == -EFAULT)
+                goto badframe;
         return regs->gprs[2];
 
 badframe:
@@ -501,7 +501,7 @@ int do_signal(struct pt_regs *regs, sigset_t *oldset)
 
         if (signr > 0) {
                 /* Whee!  Actually deliver the signal.  */
-#ifdef CONFIG_S390_SUPPORT
+#ifdef CONFIG_COMPAT
                 if (test_thread_flag(TIF_31BIT)) {
                         extern void handle_signal32(unsigned long sig,
                                                     struct k_sigaction *ka,
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 5856b3fda6bf..e10f4ca00499 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -263,7 +263,7 @@ static void do_machine_restart(void * __unused)
         int cpu;
         static atomic_t cpuid = ATOMIC_INIT(-1);
 
-        if (atomic_compare_and_swap(-1, smp_processor_id(), &cpuid))
+        if (atomic_cmpxchg(&cpuid, -1, smp_processor_id()) != -1)
                 signal_processor(smp_processor_id(), sigp_stop);
 
         /* Wait for all other cpus to enter stopped state */
@@ -313,7 +313,7 @@ static void do_machine_halt(void * __unused)
 {
         static atomic_t cpuid = ATOMIC_INIT(-1);
 
-        if (atomic_compare_and_swap(-1, smp_processor_id(), &cpuid) == 0) {
+        if (atomic_cmpxchg(&cpuid, -1, smp_processor_id()) == -1) {
                 smp_send_stop();
                 if (MACHINE_IS_VM && strlen(vmhalt_cmd) > 0)
                         cpcmd(vmhalt_cmd, NULL, 0, NULL);
@@ -332,7 +332,7 @@ static void do_machine_power_off(void * __unused)
 {
         static atomic_t cpuid = ATOMIC_INIT(-1);
 
-        if (atomic_compare_and_swap(-1, smp_processor_id(), &cpuid) == 0) {
+        if (atomic_cmpxchg(&cpuid, -1, smp_processor_id()) == -1) {
                 smp_send_stop();
                 if (MACHINE_IS_VM && strlen(vmpoff_cmd) > 0)
                         cpcmd(vmpoff_cmd, NULL, 0, NULL);
@@ -402,7 +402,7 @@ static void smp_ext_bitcall_others(ec_bit_sig sig)
         }
 }
 
-#ifndef CONFIG_ARCH_S390X
+#ifndef CONFIG_64BIT
 /*
  * this function sends a 'purge tlb' signal to another CPU.
  */
@@ -416,7 +416,7 @@ void smp_ptlb_all(void)
         on_each_cpu(smp_ptlb_callback, NULL, 0, 1);
 }
 EXPORT_SYMBOL(smp_ptlb_all);
-#endif /* ! CONFIG_ARCH_S390X */
+#endif /* ! CONFIG_64BIT */
 
 /*
  * this function sends a 'reschedule' IPI to another CPU.
@@ -783,7 +783,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
                 if (stack == 0ULL)
                         panic("smp_boot_cpus failed to allocate memory\n");
                 lowcore_ptr[i]->panic_stack = stack + (PAGE_SIZE);
-#ifndef __s390x__
+#ifndef CONFIG_64BIT
                 if (MACHINE_HAS_IEEE) {
                         lowcore_ptr[i]->extended_save_area_addr =
                                 (__u32) __get_free_pages(GFP_KERNEL,0);
@@ -793,7 +793,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
                 }
 #endif
         }
-#ifndef __s390x__
+#ifndef CONFIG_64BIT
         if (MACHINE_HAS_IEEE)
                 ctl_set_bit(14, 29); /* enable extended save area */
 #endif
diff --git a/arch/s390/kernel/sys_s390.c b/arch/s390/kernel/sys_s390.c
index efe6b83b53f7..6a63553493c5 100644
--- a/arch/s390/kernel/sys_s390.c
+++ b/arch/s390/kernel/sys_s390.c
@@ -26,9 +26,7 @@
 #include <linux/mman.h>
 #include <linux/file.h>
 #include <linux/utsname.h>
-#ifdef CONFIG_ARCH_S390X
 #include <linux/personality.h>
-#endif /* CONFIG_ARCH_S390X */
 
 #include <asm/uaccess.h>
 #include <asm/ipc.h>
@@ -121,7 +119,7 @@ out:
         return error;
 }
 
-#ifndef CONFIG_ARCH_S390X
+#ifndef CONFIG_64BIT
 struct sel_arg_struct {
         unsigned long n;
         fd_set *inp, *outp, *exp;
@@ -138,7 +136,7 @@ asmlinkage long old_select(struct sel_arg_struct __user *arg)
         return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
 
 }
-#endif /* CONFIG_ARCH_S390X */
+#endif /* CONFIG_64BIT */
 
 /*
  * sys_ipc() is the de-multiplexer for the SysV IPC calls..
@@ -211,7 +209,7 @@ asmlinkage long sys_ipc(uint call, int first, unsigned long second,
         return -EINVAL;
 }
 
-#ifdef CONFIG_ARCH_S390X
+#ifdef CONFIG_64BIT
 asmlinkage long s390x_newuname(struct new_utsname __user *name)
 {
         int ret = sys_newuname(name);
@@ -235,12 +233,12 @@ asmlinkage long s390x_personality(unsigned long personality)
 
         return ret;
 }
-#endif /* CONFIG_ARCH_S390X */
+#endif /* CONFIG_64BIT */
 
 /*
  * Wrapper function for sys_fadvise64/fadvise64_64
  */
-#ifndef CONFIG_ARCH_S390X
+#ifndef CONFIG_64BIT
 
 asmlinkage long
 s390_fadvise64(int fd, u32 offset_high, u32 offset_low, size_t len, int advice)
diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
index c5bd36fae56b..95d109968619 100644
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -67,13 +67,13 @@ extern pgm_check_handler_t do_monitor_call;
 
 #define stack_pointer ({ void **sp; asm("la %0,0(15)" : "=&d" (sp)); sp; })
 
-#ifndef CONFIG_ARCH_S390X
+#ifndef CONFIG_64BIT
 #define FOURLONG "%08lx %08lx %08lx %08lx\n"
 static int kstack_depth_to_print = 12;
-#else /* CONFIG_ARCH_S390X */
+#else /* CONFIG_64BIT */
 #define FOURLONG "%016lx %016lx %016lx %016lx\n"
 static int kstack_depth_to_print = 20;
-#endif /* CONFIG_ARCH_S390X */
+#endif /* CONFIG_64BIT */
 
 /*
  * For show_trace we have tree different stack to consider:
@@ -702,12 +702,12 @@ void __init trap_init(void)
         pgm_check_table[0x11] = &do_dat_exception;
         pgm_check_table[0x12] = &translation_exception;
         pgm_check_table[0x13] = &special_op_exception;
-#ifdef CONFIG_ARCH_S390X
+#ifdef CONFIG_64BIT
         pgm_check_table[0x38] = &do_dat_exception;
         pgm_check_table[0x39] = &do_dat_exception;
         pgm_check_table[0x3A] = &do_dat_exception;
         pgm_check_table[0x3B] = &do_dat_exception;
-#endif /* CONFIG_ARCH_S390X */
+#endif /* CONFIG_64BIT */
         pgm_check_table[0x15] = &operand_exception;
         pgm_check_table[0x1C] = &space_switch_exception;
         pgm_check_table[0x1D] = &hfp_sqrt_exception;
diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S
index 89fdb3808bc0..9289face3027 100644
--- a/arch/s390/kernel/vmlinux.lds.S
+++ b/arch/s390/kernel/vmlinux.lds.S
@@ -5,7 +5,7 @@
 #include <asm-generic/vmlinux.lds.h>
 #include <linux/config.h>
 
-#ifndef CONFIG_ARCH_S390X
+#ifndef CONFIG_64BIT
 OUTPUT_FORMAT("elf32-s390", "elf32-s390", "elf32-s390")
 OUTPUT_ARCH(s390)
 ENTRY(_start)