linux-kernel - Re: [PATCH] staging: rtl8723bs: remove get_monotonic

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Message-ID: <20180619071828.e3ahbyprthi6i6t4@kahja.local>
Date:   Tue, 19 Jun 2018 00:18:29 -0700
From:   Quytelda Kahja <quytelda@...il.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        y2038@...ts.linaro.org, Bastien Nocera <hadess@...ess.net>,
        Hans de Goede <hdegoede@...hat.com>,
        Larry Finger <Larry.Finger@...inger.net>,
        Quytelda Kahja <quytelda@...alin.org>,
        Arushi Singhal <arushisinghal19971997@...il.com>,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: rtl8723bs: remove get_monotonic_boottime()

I'm fairly sure this doesn't matter functionally (yet), but perhaps
'notify_timestamp' should be updated to an 's64' type since ktime_to_us()
returns a signed type?

That note aside, I think this is good.

On Mon, Jun 18, 2018 at 05:06:50PM +0200, Arnd Bergmann wrote:
> get_monotonic_boottime() is deprecated because it uses the
> old 'timespec' structure. This replaces one of the last callers
> with a call to ktime_get_boottime, which also simplifies it
> a bit by avoiding a double conversion.
>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
Reviewed-by: Quytelda Kahja <quytelda@...alin.org>
> ---
>  drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c | 9 +--------
>  1 file changed, 1 insertion(+), 8 deletions(-)
>
> diff --git a/drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c b/drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c
> index 02178e25fbb8..73fc3a742f74 100644
> --- a/drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c
> +++ b/drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c
> @@ -233,13 +233,6 @@ static int rtw_ieee80211_channel_to_frequency(int chan, int band)
>  	return 0; /* not supported */
>  }
>
> -static u64 rtw_get_systime_us(void)
> -{
> -	struct timespec ts;
> -	get_monotonic_boottime(&ts);
> -	return ((u64)ts.tv_sec*1000000) + ts.tv_nsec / 1000;
> -}
> -
>  #define MAX_BSSINFO_LEN 1000
>  struct cfg80211_bss *rtw_cfg80211_inform_bss(struct adapter *padapter, struct wlan_network *pnetwork)
>  {
> @@ -331,7 +324,7 @@ struct cfg80211_bss *rtw_cfg80211_inform_bss(struct adapter *padapter, struct wl
>
>  	notify_channel = ieee80211_get_channel(wiphy, freq);
>
> -	notify_timestamp = rtw_get_systime_us();
> +	notify_timestamp = ktime_to_us(ktime_get_boottime());
>
>  	notify_interval = le16_to_cpu(*(__le16 *)rtw_get_beacon_interval_from_ie(pnetwork->network.IEs));
>  	notify_capability = le16_to_cpu(*(__le16 *)rtw_get_capability_from_ie(pnetwork->network.IEs));
> --
> 2.9.0
>