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| author | Cody P Schafer <cody@linux.vnet.ibm.com> | 2013-02-23 04:35:24 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-24 05:50:20 +0400 |
| commit | 2a6e3ebee2edcade56f836390a5f0c7b76ff5f9e (patch) | |
| tree | 53005ce7c42e9fad98d9a0dec7a0035f5bb5143c | |
| parent | 108bcc96ef7047c02cad4d229f04da38186a3f3f (diff) | |
| download | linux-2a6e3ebee2edcade56f836390a5f0c7b76ff5f9e.tar.xz | |
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>
| -rw-r--r-- | include/linux/mmzone.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 34343f51e211..cf8925962b68 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -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 |