linux-kernel - Re: [2.6.22.2 review 18/84] Fix sparc32 udelay() rounding errors.

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Message-ID: <Pine.LNX.4.64.0708072340330.26397@fbirervta.pbzchgretzou.qr>
Date:	Tue, 7 Aug 2007 23:41:14 +0200 (CEST)
From:	Jan Engelhardt <jengelh@...putergmbh.de>
To:	Greg KH <gregkh@...e.de>
cc:	linux-kernel@...r.kernel.org, stable@...nel.org,
	Justin Forbes <jmforbes@...uxtx.org>,
	Zwane Mwaikambo <zwane@....linux.org.uk>,
	Theodore Ts'o <tytso@....edu>,
	Randy Dunlap <rdunlap@...otime.net>,
	Dave Jones <davej@...hat.com>,
	Chuck Wolber <chuckw@...ntumlinux.com>,
	Chris Wedgwood <reviews@...cw.f00f.org>,
	Michael Krufky <mkrufky@...uxtv.org>,
	Chuck Ebbert <cebbert@...hat.com>,
	Domenico Andreoli <cavokz@...il.com>,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, bunk@...sta.de,
	Mark Fortescue <mark@...hpc.demon.co.uk>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [2.6.22.2 review 18/84] Fix sparc32 udelay() rounding errors.


On Aug 7 2007 13:44, Greg KH wrote:

>--- a/arch/sparc/kernel/entry.S
>+++ b/arch/sparc/kernel/entry.S
>@@ -1749,8 +1749,8 @@ fpload:
> __ndelay:
> 	save	%sp, -STACKFRAME_SZ, %sp
> 	mov	%i0, %o0
>-	call	.umul
>-	 mov	0x1ad, %o1		! 2**32 / (1 000 000 000 / HZ)
>+	call	.umul			! round multiplier up so large ns ok
>+	 mov	0x1ae, %o1		! 2**32 / (1 000 000 000 / HZ)

If noone noticed - spacing seems odd :)


	Jan
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