From: Dave Hansen <haveblue@us.ibm.com>
To: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Roman Zippel <zippel@linux-m68k.org>,
Andrew Morton <akpm@osdl.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Martin Schwidefsky <schwidefsky@de.ibm.com>
Subject: Re: [patch 2/2] convert s390 page handling macros to functions v3
Date: Sun, 10 Sep 2006 09:25:18 -0700 [thread overview]
Message-ID: <1157905518.26324.83.camel@localhost.localdomain> (raw)
In-Reply-To: <20060910130832.GB12084@osiris.ibm.com>
On Sun, 2006-09-10 at 15:08 +0200, Heiko Carstens wrote:
>
> +static inline int page_test_and_clear_dirty(struct page *page)
> +{
> + unsigned long physpage = __pa((page - mem_map) << PAGE_SHIFT);
> + int skey = page_get_storage_key(physpage);
This has nothing to do with your patch at all, but why is 'page -
mem_map' being open-coded here?
I see at least a couple of page_to_phys() definitions on some
architectures. This operation is done enough times that s390 could
probably use the same treatment.
It could at least use a page_to_pfn() instead of the 'page - mem_map'
operation, right?
-- Dave
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next prev parent reply other threads:[~2006-09-10 16:25 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-08 11:17 [patch 1/2] own header file for struct page Heiko Carstens, Heiko Carstens
2006-09-08 16:46 ` Andrew Morton
2006-09-08 18:33 ` Heiko Carstens
2006-09-08 19:06 ` Andrew Morton
2006-09-08 19:47 ` [patch 1/2] own header file for struct page v2 Heiko Carstens, Heiko Carstens
2006-09-08 19:48 ` [patch 2/2] convert s390 page handling macros to functions v2 Heiko Carstens, Heiko Carstens
2006-09-09 21:05 ` [patch 1/2] own header file for struct page Roman Zippel
2006-09-10 7:51 ` Heiko Carstens
2006-09-10 13:07 ` [patch 1/2] own header file for struct page v3 Heiko Carstens, Heiko Carstens
2006-09-10 13:08 ` [patch 2/2] convert s390 page handling macros to functions v3 Heiko Carstens, Heiko Carstens
2006-09-10 16:25 ` Dave Hansen [this message]
2006-09-11 4:22 ` Heiko Carstens
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