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| author |   Robert Richter <robert.richter@amd.com> | 2009-07-07 19:30:25 +0200 |
|---|---|---|
| committer | Robert Richter <robert.richter@amd.com> | 2009-07-14 15:30:03 +0200 |
| commit | 8045a4c293d36c61656a20d581b11f7f0cd7acd5 (patch) | |
| tree | 33d201b0916c44a3cf952f96d9fee10b7b6f857b /arch/x86/oprofile/op_model_p4.c | |
| parent | Merge commit 'v2.6.31-rc3'; commit 'tip/oprofile' into oprofile/core (diff) | |
| download | linux-dev-8045a4c293d36c61656a20d581b11f7f0cd7acd5.tar.xz linux-dev-8045a4c293d36c61656a20d581b11f7f0cd7acd5.zip | |
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>
Diffstat (limited to 'arch/x86/oprofile/op_model_p4.c')
| -rw-r--r-- | arch/x86/oprofile/op_model_p4.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/x86/oprofile/op_model_p4.c b/arch/x86/oprofile/op_model_p4.c index f01e53b118fa..9db9e361182c 100644 --- a/arch/x86/oprofile/op_model_p4.c +++ b/arch/x86/oprofile/op_model_p4.c @@ -580,7 +580,7 @@ static void p4_setup_ctrs(struct op_x86_model_spec const *model, reset_value[i] = counter_config[i].count; pmc_setup_one_p4_counter(i); wrmsrl(p4_counters[VIRT_CTR(stag, i)].counter_address, - -(s64)counter_config[i].count); + -(u64)counter_config[i].count); } else { reset_value[i] = 0; } @@ -625,11 +625,11 @@ static int p4_check_ctrs(struct pt_regs * const regs, if (CCCR_OVF_P(low) || !(ctr & OP_CTR_OVERFLOW)) { oprofile_add_sample(regs, i); wrmsrl(p4_counters[real].counter_address, - -(s64)reset_value[i]); + -(u64)reset_value[i]); CCCR_CLEAR_OVF(low); wrmsr(p4_counters[real].cccr_address, low, high); wrmsrl(p4_counters[real].counter_address, - -(s64)reset_value[i]); + -(u64)reset_value[i]); } } |