[PATCH] oprofile: ppro: need to enable/disable all the counters

Need to enable/disable all the counters instead of just counter 0.

This affects all cpus with family=6, including i386/core.  Usual symptom:
only counter 0 provides samples.  Other counters don't produce samples.

Signed-off-by: Arun Sharma <arun.sharma@google.com>
Cc: Philippe Elie <phil.el@wanadoo.fr>
Cc: John Levon <levon@movementarian.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 13 insertions, 7 deletions

diff --git a/arch/i386/oprofile/op_model_ppro.c b/arch/i386/oprofile/op_model_ppro.c
index f88e05ba8eb3..ca2447e05e15 100644
--- a/arch/i386/oprofile/op_model_ppro.c
+++ b/arch/i386/oprofile/op_model_ppro.c
@@ -138,11 +138,14 @@ static int ppro_check_ctrs(struct pt_regs * const regs,
 static void ppro_start(struct op_msrs const * const msrs)
 {
         unsigned int low,high;
+        int i;
 
-        if (reset_value[0]) {
-                CTRL_READ(low, high, msrs, 0);
-                CTRL_SET_ACTIVE(low);
-                CTRL_WRITE(low, high, msrs, 0);
+        for (i = 0; i < NUM_COUNTERS; ++i) {
+                if (reset_value[i]) {
+                        CTRL_READ(low, high, msrs, i);
+                        CTRL_SET_ACTIVE(low);
+                        CTRL_WRITE(low, high, msrs, i);
+                }
         }
 }
 
@@ -150,11 +153,14 @@ static void ppro_start(struct op_msrs const * const msrs)
 static void ppro_stop(struct op_msrs const * const msrs)
 {
         unsigned int low,high;
+        int i;
 
-        if (reset_value[0]) {
-                CTRL_READ(low, high, msrs, 0);
+        for (i = 0; i < NUM_COUNTERS; ++i) {
+                if (!reset_value[i])
+                        continue;
+                CTRL_READ(low, high, msrs, i);
                 CTRL_SET_INACTIVE(low);
-                CTRL_WRITE(low, high, msrs, 0);
+                CTRL_WRITE(low, high, msrs, i);
         }
 }