linux-kernel - Re: [PATCH] selftests: timers: set-timer-lat: Fix hang when testing unsupported alarms

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Message-ID: <61d7ab12-f7e5-97aa-258a-30b56e906d7e@google.com>
Date:   Fri, 22 Sep 2017 08:51:14 -0700
From:   Greg Hackmann <ghackmann@...gle.com>
To:     Shuah Khan <shuahkh@....samsung.com>, john.stultz@...aro.org,
        tglx@...utronix.de, sboyd@...eaurora.org, shuah@...nel.org
Cc:     linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH] selftests: timers: set-timer-lat: Fix hang when testing
 unsupported alarms

On 09/22/2017 07:41 AM, Shuah Khan wrote:
> I assume you are good with this fix. I plan to apply it to linux-kselftest fixes
> today. Please let me know if you have any objections.
> 
> thanks,
> -- Shuah
> 

AIUI this check was added so set-timer-lat would treat a missing 
CAP_WAKE_ALARM as a skipped test (rather than making the entire test 
fail).  So setup_timer()'s callers would need to treat this as a special 
case, by returning immediately but with a return value of 0.