| Message ID | 20211227191757.2354329-1-nathan@kernel.org |
|---|---|
| State | New |
| Headers | show |
| Series | iwlwifi: mvm: Use div_s64 instead of do_div in iwl_mvm_ftm_rtt_smoothing() | expand |
> When building ARCH=arm allmodconfig: > > drivers/net/wireless/intel/iwlwifi/mvm/ftm-initiator.c: In function ‘iwl_mvm_ftm_rtt_smoothing’: > ./include/asm-generic/div64.h:222:35: error: comparison of distinct pointer types lacks a cast [-Werror] > 222 | (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \ > | ^~ > drivers/net/wireless/intel/iwlwifi/mvm/ftm-initiator.c:1070:9: note: in expansion of macro ‘do_div’ > 1070 | do_div(rtt_avg, 100); > | ^~~~~~ Let me take this one directly to net-next, hope that's okay. Thanks!
Jakub Kicinski <kuba@kernel.org> writes: >> When building ARCH=arm allmodconfig: >> >> drivers/net/wireless/intel/iwlwifi/mvm/ftm-initiator.c: In function >> ‘iwl_mvm_ftm_rtt_smoothing’: >> ./include/asm-generic/div64.h:222:35: error: comparison of distinct >> pointer types lacks a cast [-Werror] >> 222 | (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \ >> | ^~ >> drivers/net/wireless/intel/iwlwifi/mvm/ftm-initiator.c:1070:9: note: >> in expansion of macro ‘do_div’ >> 1070 | do_div(rtt_avg, 100); >> | ^~~~~~ > > Let me take this one directly to net-next, hope that's okay. Thanks, please do, I was offline for a longer period and just came back.
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/ftm-initiator.c b/drivers/net/wireless/intel/iwlwifi/mvm/ftm-initiator.c index 9449d1af3c11..628aee634b2a 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/ftm-initiator.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/ftm-initiator.c @@ -1066,8 +1066,7 @@ static void iwl_mvm_ftm_rtt_smoothing(struct iwl_mvm *mvm, overshoot = IWL_MVM_FTM_INITIATOR_SMOOTH_OVERSHOOT; alpha = IWL_MVM_FTM_INITIATOR_SMOOTH_ALPHA; - rtt_avg = alpha * rtt + (100 - alpha) * resp->rtt_avg; - do_div(rtt_avg, 100); + rtt_avg = div_s64(alpha * rtt + (100 - alpha) * resp->rtt_avg, 100); IWL_DEBUG_INFO(mvm, "%pM: prev rtt_avg=%lld, new rtt_avg=%lld, rtt=%lld\n",
When building ARCH=arm allmodconfig: drivers/net/wireless/intel/iwlwifi/mvm/ftm-initiator.c: In function ‘iwl_mvm_ftm_rtt_smoothing’: ./include/asm-generic/div64.h:222:35: error: comparison of distinct pointer types lacks a cast [-Werror] 222 | (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \ | ^~ drivers/net/wireless/intel/iwlwifi/mvm/ftm-initiator.c:1070:9: note: in expansion of macro ‘do_div’ 1070 | do_div(rtt_avg, 100); | ^~~~~~ do_div() has to be used with an unsigned 64-bit integer dividend but rtt_avg is a signed 64-bit integer. div_s64() expects a signed 64-bit integer dividend and signed 32-bit divisor, which fits this scenario, so use that function here to fix the warning. Fixes: 8b0f92549f2c ("iwlwifi: mvm: fix 32-bit build in FTM") Signed-off-by: Nathan Chancellor <nathan@kernel.org> --- drivers/net/wireless/intel/iwlwifi/mvm/ftm-initiator.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) base-commit: bcbddc4f9d020a4a0b881cc065729c3aaeb28098