Messages in this thread | | | Date | Wed, 14 Jan 2009 11:18:51 +0100 | From | Jesper Nilsson <> | Subject | Re: lib/klist.c: bit 0 in pointer can't be used as flag |
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On Tue, Jan 13, 2009 at 11:45:21PM +0100, David Miller wrote: > From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> > Date: Wed, 14 Jan 2009 07:40:19 +0900 > > > > It may be that we've worked around the other spots, although I haven't > > > seen anything like that, we might just have been lucky until now. > > > > > > Can you recall another place where this trick is used? > > > > rmap. > > Don't CRIS use mmu? > > I'm beginning to suspect the issue is only with objects > in the kernel image itself. Dynamically allocated memory > is properly aligned and therefore the "low bit status bits > in pointer" trick works.
Yes, that agrees with what I see here, and why we haven't seen this problem more often.
/^JN - Jesper Nilsson -- Jesper Nilsson -- jesper.nilsson@axis.com
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