Messages in this thread Patch in this message | | | From | Cody P Schafer <> | Subject | [PATCH 02/17] mmzone: add various zone_*() helper functions. | Date | Tue, 15 Jan 2013 16:24:39 -0800 |
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From: Cody P Schafer <jmesmon@gmail.com>
Add zone_is_initialized(), zone_is_empty(), zone_spans_pfn(), and zone_end_pfn().
Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com> --- include/linux/mmzone.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+)
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 73b64a3..696cb7c 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -543,6 +543,26 @@ static inline int zone_is_oom_locked(const struct zone *zone) return test_bit(ZONE_OOM_LOCKED, &zone->flags); } +static inline unsigned zone_end_pfn(const struct zone *zone) +{ + return zone->zone_start_pfn + zone->spanned_pages; +} + +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 -- 1.8.0.3
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