linux-kernel - Re: [PATCH] staging: ozwpan: Fix build warning.

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Message-ID: <CAJL_dMvs3-r+cKxNzG=i=TczwXwbcie0B+UbU7ykQ2K6aDu3+Q@mail.gmail.com>
Date:	Sun, 4 Aug 2013 21:17:37 +0300
From:	Anca Emanuel <anca.emanuel@...il.com>
To:	Rupesh Gujare <rupesh.gujare@...el.com>
Cc:	devel@...uxdriverproject.org,
	Wu Fengguang <fengguang.wu@...el.com>,
	linux-usb@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
Subject: Re: [PATCH] staging: ozwpan: Fix build warning.

Why do not use div_u64() ?

[quote]unsigned 64bit divide with 32bit divisor

This is the most common 64bit divide and should be used if possible,
as many 32bit archs can optimize this variant better than a full 64bit
divide.
[/quote]

> -               ep->credit += timespec_to_ns(&delta) / NSEC_PER_MSEC;
> +               ep->credit += div64_u64(timespec_to_ns(&delta), NSEC_PER_MSEC);
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