17 files changed, 140 insertions, 275 deletions

diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index 29dd8489ffec..ecdc19a299b2 100644
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -561,7 +561,7 @@ config HPAPCI
 
 config MVME147_SCC
         bool "SCC support for MVME147 serial ports"
-        depends on MVME147
+        depends on MVME147 && BROKEN
         help
           This is the driver for the serial ports on the Motorola MVME147
           boards.  Everyone using one of these boards should say Y here.
@@ -576,14 +576,14 @@ config SERIAL167
 
 config MVME162_SCC
         bool "SCC support for MVME162 serial ports"
-        depends on MVME16x
+        depends on MVME16x && BROKEN
         help
           This is the driver for the serial ports on the Motorola MVME162 and
           172 boards.  Everyone using one of these boards should say Y here.
 
 config BVME6000_SCC
         bool "SCC support for BVME6000 serial ports"
-        depends on BVME6000
+        depends on BVME6000 && BROKEN
         help
           This is the driver for the serial ports on the BVME4000 and BVME6000
           boards from BVM Ltd.  Everyone using one of these boards should say
diff --git a/arch/m68k/ifpsp060/src/fpsp.S b/arch/m68k/ifpsp060/src/fpsp.S
index 6c1a9a217887..73613b5f1ee5 100644
--- a/arch/m68k/ifpsp060/src/fpsp.S
+++ b/arch/m68k/ifpsp060/src/fpsp.S
@@ -753,7 +753,7 @@ fovfl_ovfl_on:
 
         bra.l           _real_ovfl
 
-# overflow occurred but is disabled. meanwhile, inexact is enabled. therefore,
+# overflow occurred but is disabled. meanwhile, inexact is enabled. Therefore,
 # we must jump to real_inex().
 fovfl_inex_on:
 
@@ -1015,7 +1015,7 @@ funfl_unfl_on2:
 
         bra.l           _real_unfl
 
-# undeflow occurred but is disabled. meanwhile, inexact is enabled. therefore,
+# underflow occurred but is disabled. meanwhile, inexact is enabled. Therefore,
 # we must jump to real_inex().
 funfl_inex_on:
 
@@ -2963,7 +2963,7 @@ iea_disabled:
 
         tst.w           %d0                     # is instr fmovm?
         bmi.b           iea_dis_fmovm           # yes
-# instruction is using an extended precision immediate operand. therefore,
+# instruction is using an extended precision immediate operand. Therefore,
 # the total instruction length is 16 bytes.
 iea_dis_immed:
         mov.l           &0x10,%d0               # 16 bytes of instruction
@@ -9624,7 +9624,7 @@ sok_dnrm:
         bge.b           sok_norm2               # thank goodness no
 
 # the multiply factor that we're trying to create should be a denorm
-# for the multiply to work. therefore, we're going to actually do a
+# for the multiply to work. Therefore, we're going to actually do a
 # multiply with a denorm which will cause an unimplemented data type
 # exception to be put into the machine which will be caught and corrected
 # later. we don't do this with the DENORMs above because this method
@@ -12216,7 +12216,7 @@ fin_sd_unfl_dis:
 
 #
 # operand will underflow AND underflow or inexact is enabled.
-# therefore, we must return the result rounded to extended precision.
+# Therefore, we must return the result rounded to extended precision.
 #
 fin_sd_unfl_ena:
         mov.l           FP_SCR0_HI(%a6),FP_SCR1_HI(%a6)
@@ -12746,7 +12746,7 @@ fdiv_zero_load_p:
 
 #
 # The destination was In Range and the source was a ZERO. The result,
-# therefore, is an INF w/ the proper sign.
+# Therefore, is an INF w/ the proper sign.
 # So, determine the sign and return a new INF (w/ the j-bit cleared).
 #
         global          fdiv_inf_load           # global for fsgldiv
@@ -12996,7 +12996,7 @@ fneg_sd_unfl_dis:
 
 #
 # operand will underflow AND underflow is enabled.
-# therefore, we must return the result rounded to extended precision.
+# Therefore, we must return the result rounded to extended precision.
 #
 fneg_sd_unfl_ena:
         mov.l           FP_SCR0_HI(%a6),FP_SCR1_HI(%a6)
@@ -13611,7 +13611,7 @@ fabs_sd_unfl_dis:
 
 #
 # operand will underflow AND underflow is enabled.
-# therefore, we must return the result rounded to extended precision.
+# Therefore, we must return the result rounded to extended precision.
 #
 fabs_sd_unfl_ena:
         mov.l           FP_SCR0_HI(%a6),FP_SCR1_HI(%a6)
@@ -14973,7 +14973,7 @@ fadd_zero_2:
 
 #
 # the ZEROes have opposite signs:
-# - therefore, we return +ZERO if the rounding modes are RN,RZ, or RP.
+# - Therefore, we return +ZERO if the rounding modes are RN,RZ, or RP.
 # - -ZERO is returned in the case of RM.
 #
 fadd_zero_2_chk_rm:
@@ -15425,7 +15425,7 @@ fsub_zero_2:
 
 #
 # the ZEROes have the same signs:
-# - therefore, we return +ZERO if the rounding mode is RN,RZ, or RP
+# - Therefore, we return +ZERO if the rounding mode is RN,RZ, or RP
 # - -ZERO is returned in the case of RM.
 #
 fsub_zero_2_chk_rm:
@@ -15693,7 +15693,7 @@ fsqrt_sd_unfl_dis:
 
 #
 # operand will underflow AND underflow is enabled.
-# therefore, we must return the result rounded to extended precision.
+# Therefore, we must return the result rounded to extended precision.
 #
 fsqrt_sd_unfl_ena:
         mov.l           FP_SCR0_HI(%a6),FP_SCR1_HI(%a6)
@@ -21000,7 +21000,7 @@ fout_pack_type:
         tst.l           %d0
         bne.b           fout_pack_set
 # "mantissa" is all zero which means that the answer is zero. but, the '040
-# algorithm allows the exponent to be non-zero. the 881/2 do not. therefore,
+# algorithm allows the exponent to be non-zero. the 881/2 do not. Therefore,
 # if the mantissa is zero, I will zero the exponent, too.
 # the question now is whether the exponents sign bit is allowed to be non-zero
 # for a zero, also...
@@ -21743,7 +21743,7 @@ denorm_set_stky:
         rts
 
 #                                                                       #
-# dnrm_lp(): normalize exponent/mantissa to specified threshhold        #
+# dnrm_lp(): normalize exponent/mantissa to specified threshold         #
 #                                                                       #
 # INPUT:                                                                #
 #       %a0        : points to the operand to be denormalized           #
@@ -22402,7 +22402,7 @@ unnorm_shift:
         bgt.b           unnorm_nrm_zero         # yes; denorm only until exp = 0
 
 #
-# exponent would not go < 0. therefore, number stays normalized
+# exponent would not go < 0. Therefore, number stays normalized
 #
         sub.w           %d0, %d1                # shift exponent value
         mov.w           FTEMP_EX(%a0), %d0      # load old exponent
diff --git a/arch/m68k/ifpsp060/src/pfpsp.S b/arch/m68k/ifpsp060/src/pfpsp.S
index 51b9f7d879dd..e71ba0ab013c 100644
--- a/arch/m68k/ifpsp060/src/pfpsp.S
+++ b/arch/m68k/ifpsp060/src/pfpsp.S
@@ -752,7 +752,7 @@ fovfl_ovfl_on:
 
         bra.l           _real_ovfl
 
-# overflow occurred but is disabled. meanwhile, inexact is enabled. therefore,
+# overflow occurred but is disabled. meanwhile, inexact is enabled. Therefore,
 # we must jump to real_inex().
 fovfl_inex_on:
 
@@ -1014,7 +1014,7 @@ funfl_unfl_on2:
 
         bra.l           _real_unfl
 
-# undeflow occurred but is disabled. meanwhile, inexact is enabled. therefore,
+# underflow occurred but is disabled. meanwhile, inexact is enabled. Therefore,
 # we must jump to real_inex().
 funfl_inex_on:
 
@@ -2962,7 +2962,7 @@ iea_disabled:
 
         tst.w           %d0                     # is instr fmovm?
         bmi.b           iea_dis_fmovm           # yes
-# instruction is using an extended precision immediate operand. therefore,
+# instruction is using an extended precision immediate operand. Therefore,
 # the total instruction length is 16 bytes.
 iea_dis_immed:
         mov.l           &0x10,%d0               # 16 bytes of instruction
@@ -5865,7 +5865,7 @@ denorm_set_stky:
         rts
 
 #                                                                       #
-# dnrm_lp(): normalize exponent/mantissa to specified threshhold        #
+# dnrm_lp(): normalize exponent/mantissa to specified threshold         #
 #                                                                       #
 # INPUT:                                                                #
 #       %a0        : points to the operand to be denormalized           #
@@ -6524,7 +6524,7 @@ unnorm_shift:
         bgt.b           unnorm_nrm_zero         # yes; denorm only until exp = 0
 
 #
-# exponent would not go < 0. therefore, number stays normalized
+# exponent would not go < 0. Therefore, number stays normalized
 #
         sub.w           %d0, %d1                # shift exponent value
         mov.w           FTEMP_EX(%a0), %d0      # load old exponent
@@ -7901,7 +7901,7 @@ fout_pack_type:
         tst.l           %d0
         bne.b           fout_pack_set
 # "mantissa" is all zero which means that the answer is zero. but, the '040
-# algorithm allows the exponent to be non-zero. the 881/2 do not. therefore,
+# algorithm allows the exponent to be non-zero. the 881/2 do not. Therefore,
 # if the mantissa is zero, I will zero the exponent, too.
 # the question now is whether the exponents sign bit is allowed to be non-zero
 # for a zero, also...
@@ -8647,7 +8647,7 @@ fin_sd_unfl_dis:
 
 #
 # operand will underflow AND underflow or inexact is enabled.
-# therefore, we must return the result rounded to extended precision.
+# Therefore, we must return the result rounded to extended precision.
 #
 fin_sd_unfl_ena:
         mov.l           FP_SCR0_HI(%a6),FP_SCR1_HI(%a6)
@@ -9177,7 +9177,7 @@ fdiv_zero_load_p:
 
 #
 # The destination was In Range and the source was a ZERO. The result,
-# therefore, is an INF w/ the proper sign.
+# Therefore, is an INF w/ the proper sign.
 # So, determine the sign and return a new INF (w/ the j-bit cleared).
 #
         global          fdiv_inf_load           # global for fsgldiv
@@ -9427,7 +9427,7 @@ fneg_sd_unfl_dis:
 
 #
 # operand will underflow AND underflow is enabled.
-# therefore, we must return the result rounded to extended precision.
+# Therefore, we must return the result rounded to extended precision.
 #
 fneg_sd_unfl_ena:
         mov.l           FP_SCR0_HI(%a6),FP_SCR1_HI(%a6)
@@ -10042,7 +10042,7 @@ fabs_sd_unfl_dis:
 
 #
 # operand will underflow AND underflow is enabled.
-# therefore, we must return the result rounded to extended precision.
+# Therefore, we must return the result rounded to extended precision.
 #
 fabs_sd_unfl_ena:
         mov.l           FP_SCR0_HI(%a6),FP_SCR1_HI(%a6)
@@ -11404,7 +11404,7 @@ fadd_zero_2:
 
 #
 # the ZEROes have opposite signs:
-# - therefore, we return +ZERO if the rounding modes are RN,RZ, or RP.
+# - Therefore, we return +ZERO if the rounding modes are RN,RZ, or RP.
 # - -ZERO is returned in the case of RM.
 #
 fadd_zero_2_chk_rm:
@@ -11856,7 +11856,7 @@ fsub_zero_2:
 
 #
 # the ZEROes have the same signs:
-# - therefore, we return +ZERO if the rounding mode is RN,RZ, or RP
+# - Therefore, we return +ZERO if the rounding mode is RN,RZ, or RP
 # - -ZERO is returned in the case of RM.
 #
 fsub_zero_2_chk_rm:
@@ -12124,7 +12124,7 @@ fsqrt_sd_unfl_dis:
 
 #
 # operand will underflow AND underflow is enabled.
-# therefore, we must return the result rounded to extended precision.
+# Therefore, we must return the result rounded to extended precision.
 #
 fsqrt_sd_unfl_ena:
         mov.l           FP_SCR0_HI(%a6),FP_SCR1_HI(%a6)
diff --git a/arch/m68k/include/asm/bootinfo.h b/arch/m68k/include/asm/bootinfo.h
index fb8a06b9ab6a..67e7a78ad96b 100644
--- a/arch/m68k/include/asm/bootinfo.h
+++ b/arch/m68k/include/asm/bootinfo.h
@@ -145,7 +145,7 @@ struct bi_record {
 
     /*
      *  Macintosh hardware profile data - unused, see macintosh.h for
-     *  resonable type values
+     *  reasonable type values
      */
 
 #define BI_MAC_VIA1BASE         0x8010  /* Mac VIA1 base address (always present) */
diff --git a/arch/m68k/include/asm/cacheflush_mm.h b/arch/m68k/include/asm/cacheflush_mm.h
index 16bf375fdbe1..73de7c89d8e0 100644
--- a/arch/m68k/include/asm/cacheflush_mm.h
+++ b/arch/m68k/include/asm/cacheflush_mm.h
@@ -128,6 +128,7 @@ static inline void __flush_page_to_ram(void *vaddr)
         }
 }
 
+#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
 #define flush_dcache_page(page)         __flush_page_to_ram(page_address(page))
 #define flush_dcache_mmap_lock(mapping)         do { } while (0)
 #define flush_dcache_mmap_unlock(mapping)       do { } while (0)
diff --git a/arch/m68k/include/asm/cacheflush_no.h b/arch/m68k/include/asm/cacheflush_no.h
index c65f00a94553..89f195656be7 100644
--- a/arch/m68k/include/asm/cacheflush_no.h
+++ b/arch/m68k/include/asm/cacheflush_no.h
@@ -12,6 +12,7 @@
 #define flush_cache_range(vma, start, end)      __flush_cache_all()
 #define flush_cache_page(vma, vmaddr)           do { } while (0)
 #define flush_dcache_range(start,len)           __flush_cache_all()
+#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
 #define flush_dcache_page(page)                 do { } while (0)
 #define flush_dcache_mmap_lock(mapping)         do { } while (0)
 #define flush_dcache_mmap_unlock(mapping)       do { } while (0)
diff --git a/arch/m68k/include/asm/processor.h b/arch/m68k/include/asm/processor.h
index 74fd674b15ad..cbd3d4751dd2 100644
--- a/arch/m68k/include/asm/processor.h
+++ b/arch/m68k/include/asm/processor.h
@@ -165,6 +165,8 @@ unsigned long get_wchan(struct task_struct *p);
         eip; })
 #define KSTK_ESP(tsk)   ((tsk) == current ? rdusp() : (tsk)->thread.usp)
 
+#define task_pt_regs(tsk)       ((struct pt_regs *) ((tsk)->thread.esp0))
+
 #define cpu_relax()     barrier()
 
 #endif
diff --git a/arch/m68k/include/asm/ptrace.h b/arch/m68k/include/asm/ptrace.h
index 8c9194b98548..ee4011c23281 100644
--- a/arch/m68k/include/asm/ptrace.h
+++ b/arch/m68k/include/asm/ptrace.h
@@ -71,6 +71,8 @@ struct switch_stack {
 #define PTRACE_GETFPREGS          14
 #define PTRACE_SETFPREGS          15
 
+#define PTRACE_SINGLEBLOCK      33      /* resume execution until next branch */
+
 #ifdef __KERNEL__
 
 #ifndef PS_S
@@ -82,6 +84,21 @@ struct switch_stack {
 #define instruction_pointer(regs) ((regs)->pc)
 #define profile_pc(regs) instruction_pointer(regs)
 extern void show_regs(struct pt_regs *);
+
+/*
+ * These are defined as per linux/ptrace.h.
+ */
+struct task_struct;
+
+#define arch_has_single_step()  (1)
+extern void user_enable_single_step(struct task_struct *);
+extern void user_disable_single_step(struct task_struct *);
+
+#ifdef CONFIG_MMU
+#define arch_has_block_step()   (1)
+extern void user_enable_block_step(struct task_struct *);
+#endif
+
 #endif /* __KERNEL__ */
 #endif /* __ASSEMBLY__ */
 #endif /* _M68K_PTRACE_H */
diff --git a/arch/m68k/include/asm/socket.h b/arch/m68k/include/asm/socket.h
index eee01cce921b..9bf49c87d954 100644
--- a/arch/m68k/include/asm/socket.h
+++ b/arch/m68k/include/asm/socket.h
@@ -60,4 +60,6 @@
 #define SO_PROTOCOL             38
 #define SO_DOMAIN               39
 
+#define SO_RXQ_OVFL             40
+
 #endif /* _ASM_SOCKET_H */
diff --git a/arch/m68k/include/asm/thread_info_mm.h b/arch/m68k/include/asm/thread_info_mm.h
index b6da3882be9b..167e518db41b 100644
--- a/arch/m68k/include/asm/thread_info_mm.h
+++ b/arch/m68k/include/asm/thread_info_mm.h
@@ -4,10 +4,12 @@
 #ifndef ASM_OFFSETS_C
 #include <asm/asm-offsets.h>
 #endif
-#include <asm/current.h>
 #include <asm/types.h>
 #include <asm/page.h>
 
+#ifndef __ASSEMBLY__
+#include <asm/current.h>
+
 struct thread_info {
         struct task_struct      *task;          /* main task structure */
         unsigned long           flags;
@@ -16,6 +18,7 @@ struct thread_info {
         __u32 cpu; /* should always be 0 on m68k */
         struct restart_block    restart_block;
 };
+#endif /* __ASSEMBLY__ */
 
 #define PREEMPT_ACTIVE          0x4000000
 
diff --git a/arch/m68k/include/asm/thread_info_no.h b/arch/m68k/include/asm/thread_info_no.h
index c2bde5e24b0b..a6512bfdd01d 100644
--- a/arch/m68k/include/asm/thread_info_no.h
+++ b/arch/m68k/include/asm/thread_info_no.h
@@ -12,8 +12,6 @@
 
 #ifdef __KERNEL__
 
-#ifndef __ASSEMBLY__
-
 /*
  * Size of kernel stack for each process. This must be a power of 2...
  */
@@ -28,6 +26,8 @@
  */
 #define THREAD_SIZE (PAGE_SIZE<<THREAD_SIZE_ORDER)
 
+#ifndef __ASSEMBLY__
+
 /*
  * low level task data.
  */
diff --git a/arch/m68k/kernel/entry.S b/arch/m68k/kernel/entry.S
index c5b33634c980..77fc7c16bf48 100644
--- a/arch/m68k/kernel/entry.S
+++ b/arch/m68k/kernel/entry.S
@@ -179,7 +179,11 @@ do_signal_return:
         addql   #8,%sp
         RESTORE_SWITCH_STACK
         addql   #4,%sp
-        jbra    resume_userspace
+        tstl    %d0
+        jeq     resume_userspace
+        | when single stepping into handler stop at the first insn
+        btst    #6,%curptr@(TASK_INFO+TINFO_FLAGS+2)
+        jeq     resume_userspace
 
 do_delayed_trace:
         bclr    #7,%sp@(PT_OFF_SR)      | clear trace bit in SR
diff --git a/arch/m68k/kernel/process.c b/arch/m68k/kernel/process.c
index 41230c595a8e..05296593e718 100644
--- a/arch/m68k/kernel/process.c
+++ b/arch/m68k/kernel/process.c
@@ -317,15 +317,12 @@ asmlinkage int sys_execve(char __user *name, char __user * __user *argv, char __
         char * filename;
         struct pt_regs *regs = (struct pt_regs *) &name;
 
-        lock_kernel();
         filename = getname(name);
         error = PTR_ERR(filename);
         if (IS_ERR(filename))
-                goto out;
+                return error;
         error = do_execve(filename, argv, envp, regs);
         putname(filename);
-out:
-        unlock_kernel();
         return error;
 }
 
diff --git a/arch/m68k/kernel/ptrace.c b/arch/m68k/kernel/ptrace.c
index 2075543c2d92..1fc217e5f06b 100644
--- a/arch/m68k/kernel/ptrace.c
+++ b/arch/m68k/kernel/ptrace.c
@@ -35,7 +35,9 @@
 #define SR_MASK 0x001f
 
 /* sets the trace bits. */
-#define TRACE_BITS 0x8000
+#define TRACE_BITS 0xC000
+#define T1_BIT 0x8000
+#define T0_BIT 0x4000
 
 /* Find the stack offset for a register, relative to thread.esp0. */
 #define PT_REG(reg)     ((long)&((struct pt_regs *)0)->reg)
@@ -44,7 +46,7 @@
 /* Mapping from PT_xxx to the stack offset at which the register is
    saved.  Notice that usp has no stack-slot and needs to be treated
    specially (see get_reg/put_reg below). */
-static int regoff[] = {
+static const int regoff[] = {
         [0]     = PT_REG(d1),
         [1]     = PT_REG(d2),
         [2]     = PT_REG(d3),
@@ -79,6 +81,14 @@ static inline long get_reg(struct task_struct *task, int regno)
                 addr = (unsigned long *)(task->thread.esp0 + regoff[regno]);
         else
                 return 0;
+        /* Need to take stkadj into account. */
+        if (regno == PT_SR || regno == PT_PC) {
+                long stkadj = *(long *)(task->thread.esp0 + PT_REG(stkadj));
+                addr = (unsigned long *) ((unsigned long)addr + stkadj);
+                /* The sr is actually a 16 bit register.  */
+                if (regno == PT_SR)
+                        return *(unsigned short *)addr;
+        }
         return *addr;
 }
 
@@ -96,6 +106,16 @@ static inline int put_reg(struct task_struct *task, int regno,
                 addr = (unsigned long *)(task->thread.esp0 + regoff[regno]);
         else
                 return -1;
+        /* Need to take stkadj into account. */
+        if (regno == PT_SR || regno == PT_PC) {
+                long stkadj = *(long *)(task->thread.esp0 + PT_REG(stkadj));
+                addr = (unsigned long *) ((unsigned long)addr + stkadj);
+                /* The sr is actually a 16 bit register.  */
+                if (regno == PT_SR) {
+                        *(unsigned short *)addr = data;
+                        return 0;
+                }
+        }
         *addr = data;
         return 0;
 }
@@ -105,7 +125,7 @@ static inline int put_reg(struct task_struct *task, int regno,
  */
 static inline void singlestep_disable(struct task_struct *child)
 {
-        unsigned long tmp = get_reg(child, PT_SR) & ~(TRACE_BITS << 16);
+        unsigned long tmp = get_reg(child, PT_SR) & ~TRACE_BITS;
         put_reg(child, PT_SR, tmp);
         clear_tsk_thread_flag(child, TIF_DELAYED_TRACE);
 }
@@ -118,18 +138,30 @@ void ptrace_disable(struct task_struct *child)
         singlestep_disable(child);
 }
 
+void user_enable_single_step(struct task_struct *child)
+{
+        unsigned long tmp = get_reg(child, PT_SR) & ~TRACE_BITS;
+        put_reg(child, PT_SR, tmp | T1_BIT);
+        set_tsk_thread_flag(child, TIF_DELAYED_TRACE);
+}
+
+void user_enable_block_step(struct task_struct *child)
+{
+        unsigned long tmp = get_reg(child, PT_SR) & ~TRACE_BITS;
+        put_reg(child, PT_SR, tmp | T0_BIT);
+}
+
+void user_disable_single_step(struct task_struct *child)
+{
+        singlestep_disable(child);
+}
+
 long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 {
         unsigned long tmp;
         int i, ret = 0;
 
         switch (request) {
-        /* when I and D space are separate, these will need to be fixed. */
-        case PTRACE_PEEKTEXT:   /* read word at location addr. */
-        case PTRACE_PEEKDATA:
-                ret = generic_ptrace_peekdata(child, addr, data);
-                break;
-
         /* read the word at location addr in the USER area. */
         case PTRACE_PEEKUSR:
                 if (addr & 3)
@@ -138,8 +170,6 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 
                 if (addr >= 0 && addr < 19) {
                         tmp = get_reg(child, addr);
-                        if (addr == PT_SR)
-                                tmp >>= 16;
                 } else if (addr >= 21 && addr < 49) {
                         tmp = child->thread.fp[addr - 21];
                         /* Convert internal fpu reg representation
@@ -149,16 +179,10 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                                 tmp = ((tmp & 0xffff0000) << 15) |
                                       ((tmp & 0x0000ffff) << 16);
                 } else
-                        break;
+                        goto out_eio;
                 ret = put_user(tmp, (unsigned long *)data);
                 break;
 
-        /* when I and D space are separate, this will have to be fixed. */
-        case PTRACE_POKETEXT:   /* write the word at location addr. */
-        case PTRACE_POKEDATA:
-                ret = generic_ptrace_pokedata(child, addr, data);
-                break;
-
         case PTRACE_POKEUSR:    /* write the word at location addr in the USER area */
                 if (addr & 3)
                         goto out_eio;
@@ -166,9 +190,9 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 
                 if (addr == PT_SR) {
                         data &= SR_MASK;
-                        data <<= 16;
-                        data |= get_reg(child, PT_SR) & ~(SR_MASK << 16);
-                } else if (addr >= 0 && addr < 19) {
+                        data |= get_reg(child, PT_SR) & ~SR_MASK;
+                }
+                if (addr >= 0 && addr < 19) {
                         if (put_reg(child, addr, data))
                                 goto out_eio;
                 } else if (addr >= 21 && addr < 48) {
@@ -185,52 +209,9 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                         goto out_eio;
                 break;
 
-        case PTRACE_SYSCALL:    /* continue and stop at next (return from) syscall */
-        case PTRACE_CONT:       /* restart after signal. */
-                if (!valid_signal(data))
-                        goto out_eio;
-
-                if (request == PTRACE_SYSCALL)
-                        set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-                else
-                        clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-                child->exit_code = data;
-                singlestep_disable(child);
-                wake_up_process(child);
-                break;
-
-        /*
-         * make the child exit.  Best I can do is send it a sigkill.
-         * perhaps it should be put in the status that it wants to
-         * exit.
-         */
-        case PTRACE_KILL:
-                if (child->exit_state == EXIT_ZOMBIE) /* already dead */
-                        break;
-                child->exit_code = SIGKILL;
-                singlestep_disable(child);
-                wake_up_process(child);
-                break;
-
-        case PTRACE_SINGLESTEP: /* set the trap flag. */
-                if (!valid_signal(data))
-                        goto out_eio;
-
-                clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-                tmp = get_reg(child, PT_SR) | (TRACE_BITS << 16);
-                put_reg(child, PT_SR, tmp);
-                set_tsk_thread_flag(child, TIF_DELAYED_TRACE);
-
-                child->exit_code = data;
-                /* give it a chance to run. */
-                wake_up_process(child);
-                break;
-
         case PTRACE_GETREGS:    /* Get all gp regs from the child. */
                 for (i = 0; i < 19; i++) {
                         tmp = get_reg(child, i);
-                        if (i == PT_SR)
-                                tmp >>= 16;
                         ret = put_user(tmp, (unsigned long *)data);
                         if (ret)
                                 break;
@@ -245,8 +226,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
                                 break;
                         if (i == PT_SR) {
                                 tmp &= SR_MASK;
-                                tmp <<= 16;
-                                tmp |= get_reg(child, PT_SR) & ~(SR_MASK << 16);
+                                tmp |= get_reg(child, PT_SR) & ~SR_MASK;
                         }
                         put_reg(child, i, tmp);
                         data += sizeof(long);
diff --git a/arch/m68k/kernel/sys_m68k.c b/arch/m68k/kernel/sys_m68k.c
index 7deb402bfc75..218f441de667 100644
--- a/arch/m68k/kernel/sys_m68k.c
+++ b/arch/m68k/kernel/sys_m68k.c
@@ -29,37 +29,16 @@
 #include <asm/page.h>
 #include <asm/unistd.h>
 
-/* common code for old and new mmaps */
-static inline long do_mmap2(
-        unsigned long addr, unsigned long len,
-        unsigned long prot, unsigned long flags,
-        unsigned long fd, unsigned long pgoff)
-{
-        int error = -EBADF;
-        struct file * file = NULL;
-
-        flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
-        if (!(flags & MAP_ANONYMOUS)) {
-                file = fget(fd);
-                if (!file)
-                        goto out;
-        }
-
-        down_write(&current->mm->mmap_sem);
-        error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
-        up_write(&current->mm->mmap_sem);
-
-        if (file)
-                fput(file);
-out:
-        return error;
-}
-
 asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
         unsigned long prot, unsigned long flags,
         unsigned long fd, unsigned long pgoff)
 {
-        return do_mmap2(addr, len, prot, flags, fd, pgoff);
+        /*
+         * This is wrong for sun3 - there PAGE_SIZE is 8Kb,
+         * so we need to shift the argument down by 1; m68k mmap64(3)
+         * (in libc) expects the last argument of mmap2 in 4Kb units.
+         */
+        return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff);
 }
 
 /*
@@ -90,57 +69,11 @@ asmlinkage int old_mmap(struct mmap_arg_struct __user *arg)
         if (a.offset & ~PAGE_MASK)
                 goto out;
 
-        a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
-
-        error = do_mmap2(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
-out:
-        return error;
-}
-
-#if 0
-struct mmap_arg_struct64 {
-        __u32 addr;
-        __u32 len;
-        __u32 prot;
-        __u32 flags;
-        __u64 offset; /* 64 bits */
-        __u32 fd;
-};
-
-asmlinkage long sys_mmap64(struct mmap_arg_struct64 *arg)
-{
-        int error = -EFAULT;
-        struct file * file = NULL;
-        struct mmap_arg_struct64 a;
-        unsigned long pgoff;
-
-        if (copy_from_user(&a, arg, sizeof(a)))
-                return -EFAULT;
-
-        if ((long)a.offset & ~PAGE_MASK)
-                return -EINVAL;
-
-        pgoff = a.offset >> PAGE_SHIFT;
-        if ((a.offset >> PAGE_SHIFT) != pgoff)
-                return -EINVAL;
-
-        if (!(a.flags & MAP_ANONYMOUS)) {
-                error = -EBADF;
-                file = fget(a.fd);
-                if (!file)
-                        goto out;
-        }
-        a.flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
-
-        down_write(&current->mm->mmap_sem);
-        error = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags, pgoff);
-        up_write(&current->mm->mmap_sem);
-        if (file)
-                fput(file);
+        error = sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,
+                               a.offset >> PAGE_SHIFT);
 out:
         return error;
 }
-#endif
 
 struct sel_arg_struct {
         unsigned long n;
diff --git a/arch/m68k/kernel/vmlinux-std.lds b/arch/m68k/kernel/vmlinux-std.lds
index 47eac19e8f61..878be5f38cad 100644
--- a/arch/m68k/kernel/vmlinux-std.lds
+++ b/arch/m68k/kernel/vmlinux-std.lds
@@ -2,6 +2,7 @@
 
 #include <asm-generic/vmlinux.lds.h>
 #include <asm/page.h>
+#include <asm/thread_info.h>
 
 OUTPUT_FORMAT("elf32-m68k", "elf32-m68k", "elf32-m68k")
 OUTPUT_ARCH(m68k)
@@ -22,73 +23,37 @@ SECTIONS
 
   _etext = .;                   /* End of text section */
 
-  . = ALIGN(16);                /* Exception table */
-  __start___ex_table = .;
-  __ex_table : { *(__ex_table) }
-  __stop___ex_table = .;
+  EXCEPTION_TABLE(16)
 
   RODATA
 
-  .data : {                     /* Data */
-        DATA_DATA
-        CONSTRUCTORS
-        }
+  RW_DATA_SECTION(16, PAGE_SIZE, THREAD_SIZE)
 
-  . = ALIGN(16);
-  .data.cacheline_aligned : { *(.data.cacheline_aligned) }
-
-  .bss : { *(.bss) }            /* BSS */
+  BSS_SECTION(0, 0, 0)
 
   _edata = .;                   /* End of data section */
 
   /* will be freed after init */
   . = ALIGN(PAGE_SIZE);         /* Init code and data */
   __init_begin = .;
-  .init.text : {
-        _sinittext = .;
-        INIT_TEXT
-        _einittext = .;
-  } :data
-  .init.data : { INIT_DATA }
-  . = ALIGN(16);
-  __setup_start = .;
-  .init.setup : { *(.init.setup) }
-  __setup_end = .;
-  __initcall_start = .;
-  .initcall.init : {
-        INITCALLS
-  }
-  __initcall_end = .;
-  __con_initcall_start = .;
-  .con_initcall.init : { *(.con_initcall.init) }
-  __con_initcall_end = .;
+  INIT_TEXT_SECTION(PAGE_SIZE) :data
+  INIT_DATA_SECTION(16)
   .m68k_fixup : {
         __start_fixup = .;
         *(.m68k_fixup)
         __stop_fixup = .;
   }
-  SECURITY_INIT
-#ifdef CONFIG_BLK_DEV_INITRD
-  . = ALIGN(8192);
-  __initramfs_start = .;
-  .init.ramfs : { *(.init.ramfs) }
-  __initramfs_end = .;
-#endif
   NOTES
-  . = ALIGN(8192);
-  __init_end = .;
-
-  .data.init_task : { *(.data.init_task) }      /* The initial task and kernel stack */
+  .init_end : {
+        /* This ALIGN be in a section so that _end is at the end of the
+           load segment. */
+        . = ALIGN(PAGE_SIZE);
+        __init_end = .;
+  }
 
   _end = . ;
 
-  /* Stabs debugging sections.  */
-  .stab 0 : { *(.stab) }
-  .stabstr 0 : { *(.stabstr) }
-  .stab.excl 0 : { *(.stab.excl) }
-  .stab.exclstr 0 : { *(.stab.exclstr) }
-  .stab.index 0 : { *(.stab.index) }
-  .stab.indexstr 0 : { *(.stab.indexstr) }
+  STABS_DEBUG
   .comment 0 : { *(.comment) }
 
   /* Sections to be discarded */
diff --git a/arch/m68k/kernel/vmlinux-sun3.lds b/arch/m68k/kernel/vmlinux-sun3.lds
index 03efaf04d7d7..1ad6b7ad2c17 100644
--- a/arch/m68k/kernel/vmlinux-sun3.lds
+++ b/arch/m68k/kernel/vmlinux-sun3.lds
@@ -2,6 +2,7 @@
 
 #include <asm-generic/vmlinux.lds.h>
 #include <asm/page.h>
+#include <asm/thread_info.h>
 
 OUTPUT_FORMAT("elf32-m68k", "elf32-m68k", "elf32-m68k")
 OUTPUT_ARCH(m68k)
@@ -23,14 +24,8 @@ SECTIONS
 
   _etext = .;                   /* End of text section */
 
-  .data : {                     /* Data */
-        DATA_DATA
-        CONSTRUCTORS
-        . = ALIGN(16);          /* Exception table */
-        __start___ex_table = .;
-        *(__ex_table)
-        __stop___ex_table = .;
-        } :data
+  EXCEPTION_TABLE(16) :data
+  RW_DATA_SECTION(16, PAGE_SIZE, THREAD_SIZE) :data
   /* End of data goes *here* so that freeing init code works properly. */
   _edata = .;
   NOTES
@@ -38,56 +33,21 @@ SECTIONS
   /* will be freed after init */
   . = ALIGN(PAGE_SIZE); /* Init code and data */
 __init_begin = .;
-        .init.text : {
-                _sinittext = .;
-                INIT_TEXT
-                _einittext = .;
-        }
-        .init.data : { INIT_DATA }
-        . = ALIGN(16);
-        __setup_start = .;
-        .init.setup : { *(.init.setup) }
-        __setup_end = .;
-        __initcall_start = .;
-        .initcall.init : {
-                INITCALLS
-        }
-        __initcall_end = .;
-        __con_initcall_start = .;
-        .con_initcall.init : { *(.con_initcall.init) }
-        __con_initcall_end = .;
+        INIT_TEXT_SECTION(PAGE_SIZE)
+        INIT_DATA_SECTION(16)
         .m68k_fixup : {
                 __start_fixup = .;
                 *(.m68k_fixup)
                 __stop_fixup = .;
         }
-        SECURITY_INIT
-#ifdef CONFIG_BLK_DEV_INITRD
-        . = ALIGN(PAGE_SIZE);
-        __initramfs_start = .;
-        .init.ramfs : { *(.init.ramfs) }
-        __initramfs_end = .;
-#endif
         . = ALIGN(PAGE_SIZE);
         __init_end = .;
-        .data.init.task : { *(.data.init_task) }
-
 
-  .bss : { *(.bss) }            /* BSS */
+  BSS_SECTION(0, 0, 0)
 
   _end = . ;
 
-  .crap : {
-        /* Stabs debugging sections.  */
-        *(.stab)
-        *(.stabstr)
-        *(.stab.excl)
-        *(.stab.exclstr)
-        *(.stab.index)
-        *(.stab.indexstr)
-        *(.comment)
-        *(.note)
-  }
+  STABS_DEBUG
 
   /* Sections to be discarded */
   DISCARDS