Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
  m68k: parport_mfc3 - Not makes it a bool before the comparison.
  m68k: don't export static inline functions
  fbdev: atafb - add palette register check
  m68k: Remove the BKL from sys_execve
  m68k: Cleanup linker scripts using new linker script macros.
  m68k: Make thread_info.h usable from assembly.
  m68knommu: define arch_has_single_step() and friends
  m68k: ptrace fixes
  m68k: use generic code for ptrace requests
  rtc: Add an RTC driver for the Ricoh RP5C01
  rtc: Add an RTC driver for the Oki MSM6242

8 files changed, 108 insertions, 170 deletions

diff --git a/arch/m68k/include/asm/ptrace.h b/arch/m68k/include/asm/ptrace.h
index 8c9194b9854..a6ab663bcc2 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, which see.
+ */
+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/thread_info_mm.h b/arch/m68k/include/asm/thread_info_mm.h
index b6da3882be9..167e518db41 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/kernel/entry.S b/arch/m68k/kernel/entry.S
index c5b33634c98..77fc7c16bf4 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 41230c595a8..05296593e71 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 2075543c2d9..1fc217e5f06 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/vmlinux-std.lds b/arch/m68k/kernel/vmlinux-std.lds
index 47eac19e8f6..878be5f38ca 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 03efaf04d7d..1ad6b7ad2c1 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
diff --git a/arch/m68knommu/kernel/ptrace.c b/arch/m68knommu/kernel/ptrace.c
index ef70ca070ce..4d3828959fb 100644
--- a/arch/m68knommu/kernel/ptrace.c
+++ b/arch/m68knommu/kernel/ptrace.c
@@ -86,6 +86,20 @@ static inline int put_reg(struct task_struct *task, int regno,
 	return 0;
 }
 
+void user_enable_single_step(struct task_struct *task)
+{
+	unsigned long srflags;
+	srflags = get_reg(task, PT_SR) | (TRACE_BITS << 16);
+	put_reg(task, PT_SR, srflags);
+}
+
+void user_disable_single_step(struct task_struct *task)
+{
+	unsigned long srflags;
+	srflags = get_reg(task, PT_SR) & ~(TRACE_BITS << 16);
+	put_reg(task, PT_SR, srflags);
+}
+
 /*
  * Called by kernel/ptrace.c when detaching..
  *
@@ -93,10 +107,8 @@ static inline int put_reg(struct task_struct *task, int regno,
  */
 void ptrace_disable(struct task_struct *child)
 {
-	unsigned long tmp;
 	/* make sure the single step bit is not set. */
-	tmp = get_reg(child, PT_SR) & ~(TRACE_BITS << 16);
-	put_reg(child, PT_SR, tmp);
+	user_disable_single_step(child);
 }
 
 long arch_ptrace(struct task_struct *child, long request, long addr, long data)