3 files changed, 16 insertions, 55 deletions

diff --git a/arch/h8300/kernel/process.c b/arch/h8300/kernel/process.c
index 27f1fce64ce4..fe21adf3e75e 100644
--- a/arch/h8300/kernel/process.c
+++ b/arch/h8300/kernel/process.c
@@ -53,22 +53,18 @@ asmlinkage void ret_from_fork(void);
 #if !defined(CONFIG_H8300H_SIM) && !defined(CONFIG_H8S_SIM)
 void default_idle(void)
 {
-        while(1) {
-                if (!need_resched()) {
-                        local_irq_enable();
-                        __asm__("sleep");
-                        local_irq_disable();
-                }
-                schedule();
-        }
+        local_irq_disable();
+        if (!need_resched()) {
+                local_irq_enable();
+                /* XXX: race here! What if need_resched() gets set now? */
+                __asm__("sleep");
+        } else
+                local_irq_enable();
 }
 #else
 void default_idle(void)
 {
-        while(1) {
-                if (need_resched())
-                        schedule();
-        }
+        cpu_relax();
 }
 #endif
 void (*idle)(void) = default_idle;
@@ -81,7 +77,13 @@ void (*idle)(void) = default_idle;
  */
 void cpu_idle(void)
 {
-        idle();
+        while (1) {
+                while (!need_resched())
+                        idle();
+                preempt_enable_no_resched();
+                schedule();
+                preempt_disable();
+        }
 }
 
 void machine_restart(char * __unused)
diff --git a/arch/h8300/kernel/ptrace.c b/arch/h8300/kernel/ptrace.c
index 05c15e869777..0ff6f79b0fed 100644
--- a/arch/h8300/kernel/ptrace.c
+++ b/arch/h8300/kernel/ptrace.c
@@ -57,43 +57,10 @@ void ptrace_disable(struct task_struct *child)
         h8300_disable_trace(child);
 }
 
-asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
+long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 {
-        struct task_struct *child;
         int ret;
 
-        lock_kernel();
-        ret = -EPERM;
-        if (request == PTRACE_TRACEME) {
-                /* are we already being traced? */
-                if (current->ptrace & PT_PTRACED)
-                        goto out;
-                /* set the ptrace bit in the process flags. */
-                current->ptrace |= PT_PTRACED;
-                ret = 0;
-                goto out;
-        }
-        ret = -ESRCH;
-        read_lock(&tasklist_lock);
-        child = find_task_by_pid(pid);
-        if (child)
-                get_task_struct(child);
-        read_unlock(&tasklist_lock);
-        if (!child)
-                goto out;
-
-        ret = -EPERM;
-        if (pid == 1)           /* you may not mess with init */
-                goto out_tsk;
-
-        if (request == PTRACE_ATTACH) {
-                ret = ptrace_attach(child);
-                goto out_tsk;
-        }
-        ret = ptrace_check_attach(child, request == PTRACE_KILL);
-        if (ret < 0)
-                goto out_tsk;
-
         switch (request) {
                 case PTRACE_PEEKTEXT: /* read word at location addr. */ 
                 case PTRACE_PEEKDATA: {
@@ -251,10 +218,6 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
                         ret = -EIO;
                         break;
         }
-out_tsk:
-        put_task_struct(child);
-out:
-        unlock_kernel();
         return ret;
 }
 
diff --git a/arch/h8300/kernel/time.c b/arch/h8300/kernel/time.c
index af8c5d2057dd..688a5100604c 100644
--- a/arch/h8300/kernel/time.c
+++ b/arch/h8300/kernel/time.c
@@ -32,10 +32,6 @@
 
 #define TICK_SIZE (tick_nsec / 1000)
 
-u64 jiffies_64;
-
-EXPORT_SYMBOL(jiffies_64);
-
 /*
  * timer_interrupt() needs to keep up the real-time clock,
  * as well as call the "do_timer()" routine every clocktick