From: William Lee Irwin III <wli@holomorphy.com>
To: B.Zolnierkiewicz@elka.pw.edu.pl
Cc: linux-kernel@vger.kernel.org
Subject: PRD_ENTRIES is 256
Date: Wed, 25 Feb 2004 01:53:17 -0800 [thread overview]
Message-ID: <20040225095317.GJ693@holomorphy.com> (raw)
PRD_ENTRIES is specified to be precisely 256; on platforms where
PAGE_SIZE varies from 4KB the calculation in the current expression
defining it is inaccurate, which may cause crashes. This patch changes
it to the constant literal 256.
-- wli
===== include/linux/ide.h 1.88 vs edited =====
--- 1.88/include/linux/ide.h Tue Feb 10 07:35:39 2004
+++ edited/include/linux/ide.h Wed Feb 25 01:46:45 2004
@@ -224,7 +224,7 @@
* allowing each to have about 256 entries (8 bytes each) from this.
*/
#define PRD_BYTES 8
-#define PRD_ENTRIES (PAGE_SIZE / (2 * PRD_BYTES))
+#define PRD_ENTRIES 256
/*
* Some more useful definitions
next reply other threads:[~2004-02-25 9:53 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-25 9:53 William Lee Irwin III [this message]
2004-02-25 13:11 ` PRD_ENTRIES is 256 Bartlomiej Zolnierkiewicz
2004-02-25 13:18 ` William Lee Irwin III
2004-02-25 16:15 ` Jeff Garzik
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