[PATCH] ia64: perfmon update

Here is what I got so far on perfmon for 2.5.31. It includes:

- your randomization patch with some rework to make it visible to user.
  (your existing program does not need to change or recompilation).

- 3 error conditions cleanups, a missing unlock fix

- copy_*user() replaced with __copy_*_user() or get/put user when appropriate.
  (This gives us a 15% speed improvement on PFM_READ_PMDS).

- sys_perfmonctl(), only check for read-only OR read-write arguments
  (read and write are not separated anymore)

- Non 64-bit overflow do not reset hardware pmd to zero anymore: not needed

- incorporated changes from 2.4.18/9: debug registers when used are
  all restored on ctxsw in.

- added automatic reset on inheritance, no more PMU specific knowledge.

include/asm-ia64/perfmon.h

@@ -45,7 +45,7 @@
  * PMC flags
  */
 #define PFM_REGFL_OVFL_NOTIFY	0x1	/* send notification on overflow */
-#define PFM_REGFL_RANDOM	0x2	/* randomize sampling interval */
+#define PFM_REGFL_RANDOM	0x2	/* randomize sampling periods    */
 
 /*
  * PMD/PMC/IBR/DBR return flags (ignored on input)
@@ -87,8 +87,10 @@ typedef struct {
 	unsigned long	reg_short_reset;/* reset after counter overflow (small) */
 
 	unsigned long	reg_reset_pmds[4]; /* which other counters to reset on overflow */
+	unsigned long	reg_random_seed;   /* seed value when randomization is used */
+	unsigned long	reg_random_mask;   /* bitmask used to limit random value */
 
-	unsigned long   reserved[16];	/* for future use */
+	unsigned long   reserved[14];	/* for future use */
 } pfarg_reg_t;
 
 typedef struct {