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Date:   Mon, 25 Jul 2022 19:05:18 -0300
From:   "Guilherme G. Piccoli" <gpiccoli@...lia.com>
To:     "Michael Kelley (LINUX)" <mikelley@...rosoft.com>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "bhe@...hat.com" <bhe@...hat.com>,
        "pmladek@...e.com" <pmladek@...e.com>,
        "kexec@...ts.infradead.org" <kexec@...ts.infradead.org>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "x86@...nel.org" <x86@...nel.org>,
        "kernel-dev@...lia.com" <kernel-dev@...lia.com>,
        "kernel@...ccoli.net" <kernel@...ccoli.net>,
        "halves@...onical.com" <halves@...onical.com>,
        "fabiomirmar@...il.com" <fabiomirmar@...il.com>,
        "alejandro.j.jimenez@...cle.com" <alejandro.j.jimenez@...cle.com>,
        "andriy.shevchenko@...ux.intel.com" 
        <andriy.shevchenko@...ux.intel.com>,
        "arnd@...db.de" <arnd@...db.de>, "bp@...en8.de" <bp@...en8.de>,
        "corbet@....net" <corbet@....net>,
        "d.hatayama@...fujitsu.com" <d.hatayama@...fujitsu.com>,
        "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
        "dyoung@...hat.com" <dyoung@...hat.com>,
        "feng.tang@...el.com" <feng.tang@...el.com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "hidehiro.kawai.ez@...achi.com" <hidehiro.kawai.ez@...achi.com>,
        "jgross@...e.com" <jgross@...e.com>,
        "john.ogness@...utronix.de" <john.ogness@...utronix.de>,
        "keescook@...omium.org" <keescook@...omium.org>,
        "luto@...nel.org" <luto@...nel.org>,
        "mhiramat@...nel.org" <mhiramat@...nel.org>,
        "mingo@...hat.com" <mingo@...hat.com>,
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        "peterz@...radead.org" <peterz@...radead.org>,
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        "senozhatsky@...omium.org" <senozhatsky@...omium.org>,
        "stern@...land.harvard.edu" <stern@...land.harvard.edu>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "vgoyal@...hat.com" <vgoyal@...hat.com>,
        vkuznets <vkuznets@...hat.com>,
        "will@...nel.org" <will@...nel.org>,
        Andrea Parri <parri.andrea@...il.com>,
        Dexuan Cui <decui@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        KY Srinivasan <kys@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Tianyu Lan <Tianyu.Lan@...rosoft.com>,
        Wei Liu <wei.liu@...nel.org>
Subject: Re: [PATCH v2 11/13] video/hyperv_fb: Avoid taking busy spinlock on
 panic path

On 25/07/2022 15:09, Michael Kelley (LINUX) wrote:
> [...]
>> +bool hv_ringbuffer_spinlock_busy(struct vmbus_channel *channel)
>> +{
>> +	struct hv_ring_buffer_info *rinfo = &channel->outbound;
>> +
>> +	if (spin_is_locked(&rinfo->ring_lock))
>> +		return true;
>> +
>> +	return false;
> 
> Could simplify the code as just:
> 
> 	return spin_is_locked(&rinfo->ring_lock);
> 

Sure, makes sense! Thanks for the suggestion, I'll do that for V3.
Cheers,


Guilherme

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