linux-kernel - Re: [PATCH net] staging: rtl8188eu: use is_zero_ether

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Date:   Mon, 11 Mar 2019 23:35:30 -0700
From:   Joe Perches <joe@...ches.com>
To:     maowenan <maowenan@...wei.com>, Larry.Finger@...inger.net,
        gregkh@...uxfoundation.org, straube.linux@...il.com,
        jananis37@...il.com, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        davem@...emloft.net
Subject: Re: [PATCH net] staging: rtl8188eu: use is_zero_ether_addr()
 instead of memcmp()

On Tue, 2019-03-12 at 14:29 +0800, maowenan wrote:
> ping...
> 
> On 2019/3/9 11:26, Mao Wenan wrote:
> > Using is_zero_ether_addr() instead of directly use
> > memcmp() to determine if the ethernet address is all
> > zeros.
[]
> > diff --git a/drivers/staging/rtl8188eu/core/rtw_mlme.c b/drivers/staging/rtl8188eu/core/rtw_mlme.c
[]
> > @@ -180,9 +180,8 @@ struct wlan_network *rtw_find_network(struct __queue *scanned_queue, u8 *addr)
> >  {
> >  	struct list_head *phead, *plist;
> >  	struct wlan_network *pnetwork = NULL;
> > -	u8 zero_addr[ETH_ALEN] = {0, 0, 0, 0, 0, 0};
> >  
> > -	if (!memcmp(zero_addr, addr, ETH_ALEN)) {
> > +	if (is_zero_ether_addr(addr)) {

How did you verify that addr is __aligned(2)?