[IA64] support for cpu0 removal

here is the BSP removal support for IA64. Its pretty much the same thing that
was released a while back, but has your feedback incorporated.

- Removed CONFIG_BSP_REMOVE_WORKAROUND and associated cmdline param
- Fixed compile issue with sn2/zx1 due to a undefined fix_b0_for_bsp
- some formatting nits (whitespace etc)

This has been tested on tiger and long back by alex on hp systems as well.

Signed-off-by: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index 410d4804fa6e..18c51c37a9a3 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -6718,6 +6718,7 @@ __initcall(pfm_init);
 void
 pfm_init_percpu (void)
 {
+        static int first_time=1;
         /*
          * make sure no measurement is active
          * (may inherit programmed PMCs from EFI).
@@ -6730,8 +6731,10 @@ pfm_init_percpu (void)
          */
         pfm_unfreeze_pmu();
 
-        if (smp_processor_id() == 0)
+        if (first_time) {
                 register_percpu_irq(IA64_PERFMON_VECTOR, &perfmon_irqaction);
+                first_time=0;
+        }
 
         ia64_setreg(_IA64_REG_CR_PMV, IA64_PERFMON_VECTOR);
         ia64_srlz_d();