[PATCH] perfmon cleanup patch

This patch includes:
        - nasty macro bug fix for  PMC_IS_MONITOR()
        - pfm_stats is now per CPU
        - pmu_owners[] is not cache line aligned to avoid false sharing
        - cleanup in /proc/perfmon
        - rewritten pfm_write_pmcs(), pfm_write_pmds() with correct semantics
        - all copy_*user() are gone
        - we do not walk the tasklist in UP mode for system-wide: now
          unified with SMP

include/asm-ia64/system.h

@@ -374,14 +374,14 @@ struct task_struct;
 extern void ia64_save_extra (struct task_struct *task);
 extern void ia64_load_extra (struct task_struct *task);
 
-#if defined(CONFIG_SMP) && defined(CONFIG_PERFMON)
+#ifdef CONFIG_PERFMON
   DECLARE_PER_CPU(int, pfm_syst_wide);
 # define PERFMON_IS_SYSWIDE() (get_cpu_var(pfm_syst_wide) != 0)
 #else
 # define PERFMON_IS_SYSWIDE() (0)
 #endif
 
-#define __switch_to(prev,next,last) do {							\
+#define __switch_to(prev,next,last) do {						\
 	if (((prev)->thread.flags & (IA64_THREAD_DBG_VALID|IA64_THREAD_PM_VALID))	\
 	    || IS_IA32_PROCESS(ia64_task_regs(prev)) || PERFMON_IS_SYSWIDE())		\
 		ia64_save_extra(prev);							\