linux-kernel - Re: [PATCH 1/4] vtime: Remove the underscore prefix invasion

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Message-ID: <CAFTL4hz11T2oy5ohBE16snuzq1cmUn3M_6Q57qzrjH=PmiYiZw@mail.gmail.com>
Date:	Wed, 14 Nov 2012 17:48:12 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	Tony Luck <tony.luck@...el.com>,
	Fenghua Yu <fenghua.yu@...el.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>
Subject: Re: [PATCH 1/4] vtime: Remove the underscore prefix invasion

2012/11/14 Steven Rostedt <rostedt@...dmis.org>:
> On Wed, 2012-11-14 at 17:26 +0100, Frederic Weisbecker wrote:
>> Prepending irq-unsafe vtime APIs with underscores was actually
>> a bad idea as the result is a big mess in the API namespace that
>> is even waiting to be further extended. Also these helpers
>> are always called from irq safe callers except kvm. Just
>> provide a vtime_account_system_irqsafe() for this specific
>> case so that we can remove the underscore prefix on other
>> vtime functions.
>>
>
>
>> -void __vtime_account_system(struct task_struct *tsk)
>> +void vtime_account_system(struct task_struct *tsk)
>>  {
>>       cputime_t delta = vtime_delta(tsk);
>
> Should we add a WARN_ON(!irqs_disabled()) check here?

Why not, I'll add one in vtime_delta().
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