mm/mmzone.c: memmap_valid_within() can be boolean

Make memmap_valid_within return bool due to this particular function
only using either one or zero as its return value.

No functional change.

Signed-off-by: Yaowei Bai <baiyaowei@cmss.chinamobile.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 12c98df..3b6fb71 100644 (file)
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -1200,13 +1200,13 @@ unsigned long __init node_memmap_size_bytes(int, unsigned long, unsigned long);
  * the zone and PFN linkages are still valid. This is expensive, but walkers
  * of the full memmap are extremely rare.
  */
-int memmap_valid_within(unsigned long pfn,
+bool memmap_valid_within(unsigned long pfn,
                                        struct page *page, struct zone *zone);
 #else
-static inline int memmap_valid_within(unsigned long pfn,
+static inline bool memmap_valid_within(unsigned long pfn,
                                        struct page *page, struct zone *zone)
 {
-       return 1;
+       return true;
 }
 #endif /* CONFIG_ARCH_HAS_HOLES_MEMORYMODEL */
 

diff --git a/mm/mmzone.c b/mm/mmzone.c
index 7d87ebb..52687fb 100644 (file)
--- a/mm/mmzone.c
+++ b/mm/mmzone.c
@@ -72,16 +72,16 @@ struct zoneref *next_zones_zonelist(struct zoneref *z,
 }
 
 #ifdef CONFIG_ARCH_HAS_HOLES_MEMORYMODEL
-int memmap_valid_within(unsigned long pfn,
+bool memmap_valid_within(unsigned long pfn,
                                        struct page *page, struct zone *zone)
 {
        if (page_to_pfn(page) != pfn)
-               return 0;
+               return false;
 
        if (page_zone(page) != zone)
-               return 0;
+               return false;
 
-       return 1;
+       return true;
 }
 #endif /* CONFIG_ARCH_HAS_HOLES_MEMORYMODEL */