[PATCH] ia64: perfmon update

        - fix bug in pfm_unload(), not allowed when not on correct CPU for
          system-wide
        - some perf/cleanup in overflow handler
        - fix reset_pmds to be on a per PMD basis on counter overflow rather
          than global
        - remove timing debug code on messages
        - no kernel info leak on PFM_END_MSG
        - remove double-store on reg_flags for pfm_write_pmcs, pfm_write_pmds
        - on restart reset_pmds is 0 by default
        - cleanup useless macros
        - cleanup some debug prints
        - added ability to remove debug code
        - streamlined sys_perfmonctl(), pfm_read_pmds(), pfm_write_*()
        - added current->tgid to default format sample header by using one
          reserved field

arch/ia64/kernel/perfmon_default_smpl.c

@@ -178,6 +178,7 @@ default_handler(struct task_struct *task, void *buf, pfm_ovfl_arg_t *arg, struct
 	ent->tstamp    = stamp;
 	ent->cpu       = smp_processor_id();
 	ent->set       = arg->active_set;
+	ent->tgid      = current->tgid;
 
 	/*
 	 * selectively store PMDs in increasing index number

include/asm-ia64/perfmon_default_smpl.h

@@ -59,7 +59,7 @@ typedef struct {
  * last_reset_value member indicates the initial value of the overflowed PMD. 
  */
 typedef struct {
-        int             pid;                    /* active process at PMU interrupt point */
+        int             pid;                    /* thread id (for NPTL, this is gettid()) */
         unsigned char   reserved1[3];           /* reserved for future use */
         unsigned char   ovfl_pmd;               /* index of overflowed PMD */
 
@@ -69,7 +69,7 @@ typedef struct {
 
         unsigned short  cpu;                    /* cpu on which the overfow occured */
         unsigned short  set;                    /* event set active when overflow ocurred   */
-        unsigned int    reserved2;              /* for future use */
+        int    		tgid;              	/* thread group id (for NPTL, this is getpid()) */
 } pfm_default_smpl_entry_t;
 
 #define PFM_DEFAULT_MAX_PMDS		64 /* how many pmds supported by data structures (sizeof(unsigned long) */