From d42ce812b8a32adddeee3a692005f82f95ff15a3 Mon Sep 17 00:00:00 2001 From: "akpm@osdl.org" <akpm@osdl.org> Date: Sat, 16 Apr 2005 15:23:57 -0700 Subject: [PATCH] [PATCH] arm: add comment about max_low_pfn/max_pfn ) 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> Signed-off-by: Linus Torvalds <torvalds@osdl.org> --- arch/arm/mm/init.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c index 41156c5370f7..72a2b8cee319 100644 --- a/arch/arm/mm/init.c +++ b/arch/arm/mm/init.c @@ -223,6 +223,9 @@ find_memend_and_nodes(struct meminfo *mi, struct node_info *np) * 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); -- GitLab