From: ebiederm+eric@ccr.net (Eric W. Biederman)
To: Linus Torvalds <torvalds@transmeta.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.rutgers.edu
Subject: [PATCH] tweak page_address
Date: 23 May 1999 13:43:20 -0500 [thread overview]
Message-ID: <m1aeuvsk3b.fsf@flinx.ccr.net> (raw)
Replace a multiplication by a shift in page_address.
The compiler probably already does but why take chances.
Eric
diff -uNrX linux-ignore-files linux-2.3.3.eb2/include/linux/pagemap.h linux-2.3.3.eb3/include/linux/pagemap.h
--- linux-2.3.3.eb2/include/linux/pagemap.h Sun May 16 21:55:28 1999
+++ linux-2.3.3.eb3/include/linux/pagemap.h Tue May 18 01:13:39 1999
@@ -14,7 +14,7 @@
static inline unsigned long page_address(struct page * page)
{
- return PAGE_OFFSET + PAGE_SIZE * (page - mem_map);
+ return PAGE_OFFSET + ((page - mem_map) << PAGE_SHIFT);
}
/*
--
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reply other threads:[~1999-05-23 19:27 UTC|newest]
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