linux-kernel - Re: [PATCH] kernel: x86: tboot: Replace mdelay with usleep_range in tboot_wait_for

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Message-ID: <alpine.DEB.2.20.1801241246350.1997@nanos>
Date:   Wed, 24 Jan 2018 12:47:25 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Jia-Ju Bai <baijiaju1990@...il.com>
cc:     ning.sun@...el.com, mingo@...hat.com, hpa@...or.com,
        x86@...nel.org, tboot-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kernel: x86: tboot: Replace mdelay with usleep_range in
 tboot_wait_for_aps

On Wed, 24 Jan 2018, Jia-Ju Bai wrote:

> The function tboot_wait_for_aps is not called in atomic context.
> Thus mdelay can be replaced with usleep_range, to reduce busy wait.

And how did you establish that it's not called in atomic context?

Thanks,

	tglx