[patch 006/198] arm: add comment about max_low_pfn/max_pfn

[akpm@osdl.org]

From: Russell King <rmk+lkml@arm.linux.org.uk>

Oddly, max_low_pfn/max_pfn end up being the number of pages in the system,
rather than the maximum PFN on ARM.  This doesn't seem to cause any problems,
so just add a note about it.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 25-akpm/arch/arm/mm/init.c |    3 +++
 1 files changed, 3 insertions(+)

diff -puN arch/arm/mm/init.c~arm-add-comment-about-max_low_pfn-max_pfn arch/arm/mm/init.c
--- 25/arch/arm/mm/init.c~arm-add-comment-about-max_low_pfn-max_pfn	2005-04-12 03:21:04.967381744 -0700
+++ 25-akpm/arch/arm/mm/init.c	2005-04-12 03:21:04.971381136 -0700
@@ -223,6 +223,9 @@ find_memend_and_nodes(struct meminfo *mi
 	 * This doesn't seem to be used by the Linux memory
 	 * manager any more.  If we can get rid of it, we
 	 * also get rid of some of the stuff above as well.
+	 *
+	 * Note: max_low_pfn and max_pfn reflect the number
+	 * of _pages_ in the system, not the maximum PFN.
 	 */
 	max_low_pfn = memend_pfn - O_PFN_DOWN(PHYS_OFFSET);
 	max_pfn = memend_pfn - O_PFN_DOWN(PHYS_OFFSET);
_
-
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