Commit 2a6e3ebe authored Feb 22, 2013 by Cody P Schafer Committed by Linus Torvalds Feb 23, 2013

mm: add zone_is_empty() and zone_is_initialized()



Factoring out these 2 checks makes it more clear what we are actually
checking for.

Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
Cc: David Hansen <dave@linux.vnet.ibm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 108bcc96

include/linux/mmzone.h

+10 −0

Original line number	Diff line number	Diff line
		@@ -537,6 +537,16 @@ static inline bool zone_spans_pfn(const struct zone *zone, unsigned long pfn)
		return zone->zone_start_pfn <= pfn && pfn < zone_end_pfn(zone);
		}

		static inline bool zone_is_initialized(struct zone *zone)
		{
		return !!zone->wait_table;
		}

		static inline bool zone_is_empty(struct zone *zone)
		{
		return zone->spanned_pages == 0;
		}

		/*
		* The "priority" of VM scanning is how much of the queues we will scan in one
		* go. A value of 12 for DEF_PRIORITY implies that we will scan 1/4096th of the