From: Yinghai Lu <yinghai@kernel.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@elte.hu>,
Mikael Pettersson <mikpe@it.uu.se>,
Matthew Wilcox <matthew@wil.cx>,
Grant Grundler <grundler@parisc-linux.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-pci@vger.kernel.org
Subject: Re: [BUG 2.6.31-rc1] HIGHMEM64G causes hang in PCI init on 32-bit x86
Date: Tue, 30 Jun 2009 16:13:51 -0700 [thread overview]
Message-ID: <4A4A9C2F.80808@kernel.org> (raw)
In-Reply-To: <alpine.LFD.2.01.0906301603280.3605@localhost.localdomain>
Linus Torvalds wrote:
>
> On Tue, 30 Jun 2009, Linus Torvalds wrote:
>> I don't see any single-use trick then, and so it needs the whole statement
>> expression mess.
>
> Hmm. Does (((x)-1) | mask)+1) work?
>
> I haven't thought it fully through, but that _should_ take care of the
> "already aligned" case, no?
yes. that is right.
then how about
roundup(x,y)
round_up(x,y)
roundup doesn't need y is 2^n
but round_up does need y is 2^n, and only for x86
the name is confusing.
YH
next prev parent reply other threads:[~2009-06-30 23:14 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-26 15:59 [BUG 2.6.31-rc1] HIGHMEM64G causes hang in PCI init on 32-bit x86 Mikael Pettersson
2009-06-27 1:13 ` Mikael Pettersson
2009-06-27 4:25 ` Grant Grundler
2009-06-27 5:31 ` H. Peter Anvin
2009-06-29 2:24 ` Grant Grundler
2009-06-27 9:42 ` Mikael Pettersson
2009-06-27 19:27 ` H. Peter Anvin
2009-06-27 21:34 ` Mikael Pettersson
2009-06-27 4:53 ` H. Peter Anvin
2009-06-27 9:45 ` Mikael Pettersson
2009-06-29 2:29 ` Grant Grundler
2009-06-29 5:00 ` H. Peter Anvin
2009-06-29 11:12 ` Mikael Pettersson
2009-06-29 11:21 ` Matthew Wilcox
2009-06-29 11:57 ` Mikael Pettersson
2009-06-29 18:29 ` H. Peter Anvin
2009-06-29 22:47 ` Yinghai Lu
2009-06-29 23:29 ` Yinghai Lu
2009-06-30 0:27 ` H. Peter Anvin
2009-06-30 1:14 ` Yinghai Lu
2009-06-30 1:18 ` H. Peter Anvin
2009-06-30 1:24 ` Yinghai Lu
2009-06-30 2:41 ` H. Peter Anvin
2009-06-30 1:26 ` Linus Torvalds
2009-06-30 1:41 ` Yinghai Lu
2009-06-30 8:45 ` Mikael Pettersson
2009-06-30 14:48 ` H. Peter Anvin
2009-06-30 15:00 ` Rolf Eike Beer
2009-06-30 18:52 ` H. Peter Anvin
2009-06-30 19:33 ` Yinghai Lu
2009-06-30 19:44 ` H. Peter Anvin
2009-06-30 20:05 ` Yinghai Lu
2009-06-30 21:21 ` H. Peter Anvin
2009-06-30 21:50 ` Yinghai Lu
2009-06-30 22:10 ` Linus Torvalds
2009-06-30 22:30 ` Yinghai Lu
2009-06-30 22:51 ` Yinghai Lu
2009-06-30 22:54 ` H. Peter Anvin
2009-06-30 23:00 ` Linus Torvalds
2009-06-30 23:04 ` Linus Torvalds
2009-06-30 23:13 ` Yinghai Lu [this message]
2009-06-30 23:19 ` H. Peter Anvin
2009-07-01 19:32 ` [PATCH] x86: add boundary check for 32bit res before expand e820 resource to alignment Yinghai Lu
2009-07-01 19:33 ` [PATCH] fix round_up/down Yinghai Lu
2009-07-01 19:39 ` Joe Perches
2009-07-01 20:02 ` Andrew Morton
2009-07-02 18:10 ` [PATCH] x86: add boundary check for 32bit res before expand e820 resource to alignment -v2 Yinghai Lu
2009-07-03 8:05 ` Ingo Molnar
2009-06-30 23:16 ` [BUG 2.6.31-rc1] HIGHMEM64G causes hang in PCI init on 32-bit x86 H. Peter Anvin
2009-06-30 20:10 ` Linus Torvalds
2009-06-30 1:44 ` H. Peter Anvin
2009-06-30 0:22 ` H. Peter Anvin
2009-06-27 19:33 ` [tip:x86/urgent] Revert "x86: cap iomem_resource to addressable physical memory" tip-bot for H. Peter Anvin
2009-06-27 21:49 ` Mikael Pettersson
2009-06-27 22:04 ` tip-bot for H. Peter Anvin
2009-06-28 7:39 ` tip-bot for H. Peter Anvin
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