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Date: Mon, 25 Jan 2016 18:21:27 +0530
From: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
To: Joe Perches <joe@perches.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>, Willy Tarreau <willy@meta-x.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        devel@driverdev.osuosl.org, Sirnam Swetha <theonly.ultimate@gmail.com>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Revert "Staging: panel: usleep_range is preferred over
 udelay"
Message-ID: <20160125125127.GB29998@sudip-pc>
References: <1453540760-31034-1-git-send-email-sudipm.mukherjee@gmail.com>
 <20160125091601.GG5325@mwanda>
 <1453726046.28952.54.camel@perches.com>
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On Mon, Jan 25, 2016 at 04:47:26AM -0800, Joe Perches wrote:
> On Mon, 2016-01-25 at 12:16 +0300, Dan Carpenter wrote:
> > Ugh...  Checkpatch told us to introduce bugs...  :(  We almost certainly
> > would have missed this bug in review, but it wasn't sent to the list so
> > I guess we'll never know.
> 
> So when isn't usleep_range preferred over udelay?

inside a spin_lock or in some interrupt routine.

regards
sudip