X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=arch%2Fs390%2Fkernel%2Fprocess.c;h=ce203154d8ce3a6c8f9bf4a07cd7ad072e3b3ec8;hb=c489f4451965f4d355340ea1e60a5863c9ed2890;hp=441975b796fb03d901cef8a63dc3414a3a2b508c;hpb=dce554708cdb02a1053ca3a68997b9facbfde5ce;p=safe%2Fjmp%2Flinux-2.6

diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index 441975b..ce20315 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -21,6 +21,7 @@
 #include <linux/sched.h>
 #include <linux/kernel.h>
 #include <linux/mm.h>
+#include <linux/fs.h>
 #include <linux/smp.h>
 #include <linux/stddef.h>
 #include <linux/unistd.h>
@@ -28,14 +29,13 @@
 #include <linux/slab.h>
 #include <linux/vmalloc.h>
 #include <linux/user.h>
-#include <linux/a.out.h>
 #include <linux/interrupt.h>
 #include <linux/delay.h>
 #include <linux/reboot.h>
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/notifier.h>
-
+#include <linux/utsname.h>
 #include <asm/uaccess.h>
 #include <asm/pgtable.h>
 #include <asm/system.h>
@@ -43,6 +43,7 @@
 #include <asm/processor.h>
 #include <asm/irq.h>
 #include <asm/timer.h>
+#include <asm/cpu.h>
 
 asmlinkage void ret_from_fork(void) asm ("ret_from_fork");
 
@@ -90,6 +91,15 @@ EXPORT_SYMBOL(unregister_idle_notifier);
 
 void do_monitor_call(struct pt_regs *regs, long interruption_code)
 {
+#ifdef CONFIG_SMP
+	struct s390_idle_data *idle;
+
+	idle = &__get_cpu_var(s390_idle);
+	spin_lock(&idle->lock);
+	idle->idle_time += get_clock() - idle->idle_enter;
+	idle->in_idle = 0;
+	spin_unlock(&idle->lock);
+#endif
 	/* disable monitor call class 0 */
 	__ctl_clear_bit(8, 15);
 
@@ -104,21 +114,27 @@ extern void s390_handle_mcck(void);
 static void default_idle(void)
 {
 	int cpu, rc;
+	int nr_calls = 0;
+	void *hcpu;
+#ifdef CONFIG_SMP
+	struct s390_idle_data *idle;
+#endif
 
 	/* CPU is going idle. */
 	cpu = smp_processor_id();
-
+	hcpu = (void *)(long)cpu;
 	local_irq_disable();
 	if (need_resched()) {
 		local_irq_enable();
 		return;
 	}
 
-	rc = atomic_notifier_call_chain(&idle_chain,
-					S390_CPU_IDLE, (void *)(long) cpu);
-	if (rc != NOTIFY_OK && rc != NOTIFY_DONE)
-		BUG();
-	if (rc != NOTIFY_OK) {
+	rc = __atomic_notifier_call_chain(&idle_chain, S390_CPU_IDLE, hcpu, -1,
+					  &nr_calls);
+	if (rc == NOTIFY_BAD) {
+		nr_calls--;
+		__atomic_notifier_call_chain(&idle_chain, S390_CPU_NOT_IDLE,
+					     hcpu, nr_calls, NULL);
 		local_irq_enable();
 		return;
 	}
@@ -136,11 +152,22 @@ static void default_idle(void)
 	local_mcck_disable();
 	if (test_thread_flag(TIF_MCCK_PENDING)) {
 		local_mcck_enable();
+		/* disable monitor call class 0 */
+		__ctl_clear_bit(8, 15);
+		atomic_notifier_call_chain(&idle_chain, S390_CPU_NOT_IDLE,
+					   hcpu);
 		local_irq_enable();
 		s390_handle_mcck();
 		return;
 	}
-
+#ifdef CONFIG_SMP
+	idle = &__get_cpu_var(s390_idle);
+	spin_lock(&idle->lock);
+	idle->idle_count++;
+	idle->in_idle = 1;
+	idle->idle_enter = get_clock();
+	spin_unlock(&idle->lock);
+#endif
 	trace_hardirqs_on();
 	/* Wait for external, I/O or machine check interrupt. */
 	__load_psw_mask(psw_kernel_bits | PSW_MASK_WAIT |
@@ -161,13 +188,15 @@ void cpu_idle(void)
 
 void show_regs(struct pt_regs *regs)
 {
-	struct task_struct *tsk = current;
-
-        printk("CPU:    %d    %s\n", task_thread_info(tsk)->cpu, print_tainted());
-        printk("Process %s (pid: %d, task: %p, ksp: %p)\n",
-	       current->comm, current->pid, (void *) tsk,
-	       (void *) tsk->thread.ksp);
-
+	print_modules();
+	printk("CPU: %d %s %s %.*s\n",
+	       task_thread_info(current)->cpu, print_tainted(),
+	       init_utsname()->release,
+	       (int)strcspn(init_utsname()->version, " "),
+	       init_utsname()->version);
+	printk("Process %s (pid: %d, task: %p, ksp: %p)\n",
+	       current->comm, current->pid, current,
+	       (void *) current->thread.ksp);
 	show_registers(regs);
 	/* Show stack backtrace if pt_regs is from kernel mode */
 	if (!(regs->psw.mask & PSW_MASK_PSTATE))
@@ -253,14 +282,12 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long new_stackp,
 	save_fp_regs(&current->thread.fp_regs);
 	memcpy(&p->thread.fp_regs, &current->thread.fp_regs,
 	       sizeof(s390_fp_regs));
-        p->thread.user_seg = __pa((unsigned long) p->mm->pgd) | _SEGMENT_TABLE;
 	/* Set a new TLS ?  */
 	if (clone_flags & CLONE_SETTLS)
 		p->thread.acrs[0] = regs->gprs[6];
 #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;
 	/* Set a new TLS ?  */
 	if (clone_flags & CLONE_SETTLS) {
 		if (test_thread_flag(TIF_31BIT)) {