From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
To: Andrew Morton <akpm@osdl.org>
Cc: linux-kernel@vger.kernel.org
Subject: [2.6.13-mm2] i386-sparsemem-compile-with-DMA32
Date: Fri, 09 Sep 2005 14:33:49 +0900 [thread overview]
Message-ID: <43211EBD.9080405@jp.fujitsu.com> (raw)
Because 2.6.13-mm2 adds new zone DMA32, ZONES_SHIFT becomes 3.
So, flags bits reserved for (SECTION | NODE | ZONE) should be increase.
-- Kame
==
ZONE_SHIFT is increased, FLAGS_RESERVED should be.
Signed-off-by Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Index: linux-2.6.13-mm2/include/linux/mmzone.h
===================================================================
--- linux-2.6.13-mm2.orig/include/linux/mmzone.h
+++ linux-2.6.13-mm2/include/linux/mmzone.h
@@ -458,10 +458,11 @@ extern struct pglist_data contig_page_da
#if BITS_PER_LONG == 32 || defined(ARCH_HAS_ATOMIC_UNSIGNED)
/*
* with 32 bit page->flags field, we reserve 8 bits for node/zone info.
- * there are 3 zones (2 bits) and this leaves 8-2=6 bits for nodes.
+ * there are 4 zones (3 bits) and this leaves 8-2=6 bits for nodes.
+ * +6bits for sections if CONFIG_SPARSEMEM
*/
-#define FLAGS_RESERVED 8
+#define FLAGS_RESERVED 9
#elif BITS_PER_LONG == 64
/*
reply other threads:[~2005-09-09 5:34 UTC|newest]
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