[XenPPC] [xenppc-unstable] [POWERPC][XEN] remove dead preemption code

[Xen patchbot-xenppc-unstable <patchbot-xenppc-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Jimi Xenidis <jimix@xxxxxxxxxxxxxx>
# Node ID ddaaf7ca1c34fadf3741433c33bb676a0376adeb
# Parent  f25517f71f40b1636b0b7eb8dfefad231053e569
[POWERPC][XEN] remove dead preemption code

Signed-off-by: Jimi Xenidis <jimix@xxxxxxxxxxxxxx>
---
 xen/arch/powerpc/exceptions.c |   30 ++++--------------------------
 1 files changed, 4 insertions(+), 26 deletions(-)

diff -r f25517f71f40 -r ddaaf7ca1c34 xen/arch/powerpc/exceptions.c
--- a/xen/arch/powerpc/exceptions.c     Fri Sep 01 12:12:43 2006 -0400
+++ b/xen/arch/powerpc/exceptions.c     Fri Sep 01 12:19:41 2006 -0400
@@ -16,6 +16,7 @@
  * Copyright (C) IBM Corp. 2005, 2006
  *
  * Authors: Hollis Blanchard <hollisb@xxxxxxxxxx>
+ *          Jimi Xenidis <jimix@xxxxxxxxxxxxxx>
  */
 
 #include <xen/config.h>
@@ -23,11 +24,9 @@
 #include <xen/sched.h>
 #include <xen/serial.h>
 #include <xen/gdbstub.h>
-#include <public/xen.h>
 #include <asm/time.h>
 
 #undef DEBUG
-#define HDEC_PREEMPT
 
 extern ulong ppc_do_softirq(ulong orig_msr);
 extern void do_timer(struct cpu_user_regs *regs);
@@ -38,31 +37,10 @@ int hdec_sample = 0;
 
 void do_timer(struct cpu_user_regs *regs)
 {
-    /* XXX this is just here to keep HDEC from firing until
-     * reprogram_ac_timer() sets the proper next-tick time */
-    mthdec(timebase_freq);
-
-#ifdef HDEC_PREEMPT
+    /* Set HDEC high so it stops firing and can be reprogrammed by
+     * set_preempt() */
+    mthdec(INT_MAX);
     raise_softirq(TIMER_SOFTIRQ);
-#endif
-#ifdef DEBUG
-    {
-        int d;
-        if (regs->msr & MSR_HV) {
-            d = -1;
-        } else {
-            d = get_current()->domain->domain_id;
-        }
-        extern char serial_getc_nb(int handle);
-        if (0 && serial_getc_nb(0) > 0) {
-            printk("H: pc: 0x%lx lr: 0x%lx \n", regs->pc, regs->lr);
-        }
-        if (hdec_sample)  {
-            printk("H: pc: 0x%lx lr: 0x%lx \n", regs->pc, regs->lr);
-            hdec_sample = 0;
-        }
-    }
-#endif
 }
 
 void do_dec(struct cpu_user_regs *regs)

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