linux-kernel - Re: [PATCH v4 03/17] wlcore: Align reg_ch_conf_pending and tmp_ch_bitmap to unsigned long for better performance

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Date:   Mon, 4 Mar 2019 14:30:17 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     Fenghua Yu <fenghua.yu@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        H Peter Anvin <hpa@...or.com>,
        Dave Hansen <dave.hansen@...el.com>,
        Ashok Raj <ashok.raj@...el.com>,
        Ravi V Shankar <ravi.v.shankar@...el.com>,
        Xiaoyao Li <xiaoyao.li@...el.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        x86 <x86@...nel.org>, kvm@...r.kernel.org
Subject: Re: [PATCH v4 03/17] wlcore: Align reg_ch_conf_pending and
 tmp_ch_bitmap to unsigned long for better performance

On Mon, Mar 04, 2019 at 02:09:30PM +0100, Paolo Bonzini wrote:
> >> @@ -1700,14 +1700,14 @@ void wlcore_set_pending_regdomain_ch(struct wl1271 *wl, u16 channel,
> >>  	ch_bit_idx = wlcore_get_reg_conf_ch_idx(band, channel);
> >>  
> >>  	if (ch_bit_idx >= 0 && ch_bit_idx <= WL1271_MAX_CHANNELS)
> >> -		set_bit(ch_bit_idx, (long *)wl->reg_ch_conf_pending);
> >> +		__set_bit_le(ch_bit_idx, (long *)wl->reg_ch_conf_pending);
> >>  }
> >>  

> I've used __set_bit_le when setting reg_ch_conf_pending so no need to
> swizzle here; 

Argh, reading hard. Yes, then it all works.