From: Dave Hansen <haveblue@us.ibm.com>
To: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, mbligh@google.com
Subject: Re: [RFC 5/7] LTTng instrumentation mm
Date: Mon, 19 Nov 2007 11:43:01 -0800 [thread overview]
Message-ID: <1195501381.27759.127.camel@localhost> (raw)
In-Reply-To: <20071119185258.GA998@Krystal>
On Mon, 2007-11-19 at 13:52 -0500, Mathieu Desnoyers wrote:
> > > So I guess the result is a pointer ? Should this be expected ?
> >
> > Nope. 'pointer - pointer' is an integer. Just solve this equation for
> > integer:
> >
> > 'pointer + integer = pointer'
> >
>
> Well, using page_to_pfn turns out to be ugly in markers (and in
> printks) then. Depending on the architecture, it will result in either
> an unsigned long (x86_64) or an unsigned int (i386), which corresponds
> to %lu or %u and will print a warning if we don't cast it explicitly.
Casting the i386 one to be an unconditional 'unsigned long' shouldn't be
an issue. We don't generally expect pfns to fit into ints anyway.
-- Dave
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next prev parent reply other threads:[~2007-11-19 19:43 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20071113193349.214098508@polymtl.ca>
2007-11-13 19:33 ` [RFC 5/7] LTTng instrumentation mm Mathieu Desnoyers
2007-11-15 21:06 ` Dave Hansen
2007-11-15 21:51 ` Mathieu Desnoyers
2007-11-15 22:16 ` Dave Hansen
2007-11-16 14:30 ` Mathieu Desnoyers
2007-11-19 18:04 ` Dave Hansen
2007-11-28 14:09 ` [RFC PATCH] LTTng instrumentation mm (using page_to_pfn) Mathieu Desnoyers
2007-11-28 16:54 ` Dave Hansen
2007-11-29 2:34 ` Mathieu Desnoyers
2007-11-29 6:25 ` Dave Hansen
2007-11-30 16:11 ` [RFC PATCH] LTTng instrumentation mm (updated) Mathieu Desnoyers
2007-11-30 17:46 ` Dave Hansen
2007-11-30 17:05 ` Mathieu Desnoyers
2007-11-30 18:42 ` Dave Hansen
2007-11-30 19:10 ` Mathieu Desnoyers
2007-12-04 19:15 ` Frank Ch. Eigler
2007-12-04 19:25 ` Mathieu Desnoyers
2007-12-04 19:40 ` Dave Hansen
2007-12-04 20:05 ` Mathieu Desnoyers
2007-12-04 20:24 ` Dave Hansen
2007-12-04 20:28 ` Dave Hansen
2007-11-16 14:47 ` [RFC 5/7] LTTng instrumentation mm Mathieu Desnoyers
2007-11-19 18:07 ` Dave Hansen
2007-11-19 18:52 ` Mathieu Desnoyers
2007-11-19 19:00 ` Mathieu Desnoyers
2007-11-19 19:43 ` Dave Hansen
2007-11-19 19:43 ` Dave Hansen [this message]
2007-11-19 19:52 ` [PATCH] Cast __page_to_pfn to unsigned long in CONFIG_SPARSEMEM Mathieu Desnoyers
2007-11-19 20:09 ` Dave Hansen
2007-11-19 20:20 ` [PATCH] Cast page_to_pfn " Mathieu Desnoyers
2007-11-19 21:08 ` Andrew Morton
2007-11-19 21:19 ` Dave Hansen
2007-11-19 21:26 ` Dave Hansen
2007-11-21 20:12 ` Christoph Lameter
2007-11-20 17:34 ` Mathieu Desnoyers
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