x86/oprofile: Fix cast of counter value

When casting the counter value to a 64 bit value in 32 bit mode, sign
extension may lead to broken counter values. This patch fixes this by
casting to (u64) instead of (s64).

Signed-off-by: Robert Richter <robert.richter@amd.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/x86/oprofile/op_model_amd.c b/arch/x86/oprofile/op_model_amd.c
index e95268eb9220..7ca8306aefae 100644
--- a/arch/x86/oprofile/op_model_amd.c
+++ b/arch/x86/oprofile/op_model_amd.c
@@ -111,7 +111,7 @@ static void op_amd_setup_ctrs(struct op_x86_model_spec const *model,
                 if (counter_config[i].enabled && msrs->counters[i].addr) {
                         reset_value[i] = counter_config[i].count;
                         wrmsrl(msrs->counters[i].addr,
-                               -(s64)counter_config[i].count);
+                               -(u64)counter_config[i].count);
                         rdmsrl(msrs->controls[i].addr, val);
                         val &= model->reserved;
                         val |= op_x86_get_ctrl(model, &counter_config[i]);
@@ -237,7 +237,7 @@ static int op_amd_check_ctrs(struct pt_regs * const regs,
                 if (val & OP_CTR_OVERFLOW)
                         continue;
                 oprofile_add_sample(regs, i);
-                wrmsrl(msrs->counters[i].addr, -(s64)reset_value[i]);
+                wrmsrl(msrs->counters[i].addr, -(u64)reset_value[i]);
         }
 
         op_amd_handle_ibs(regs, msrs);