mm/memory_hotplug: is_mem_section_removable() can return bool

Make is_mem_section_removable() return bool to improve readability due
to this particular function only using either one or zero as its return
value.

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/memory_hotplug.h b/include/linux/memory_hotplug.h
index adbef58..20d8a5d 100644 (file)
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -247,16 +247,16 @@ static inline void mem_hotplug_done(void) {}
 
 #ifdef CONFIG_MEMORY_HOTREMOVE
 
-extern int is_mem_section_removable(unsigned long pfn, unsigned long nr_pages);
+extern bool is_mem_section_removable(unsigned long pfn, unsigned long nr_pages);
 extern void try_offline_node(int nid);
 extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages);
 extern void remove_memory(int nid, u64 start, u64 size);
 
 #else
-static inline int is_mem_section_removable(unsigned long pfn,
+static inline bool is_mem_section_removable(unsigned long pfn,
                                        unsigned long nr_pages)
 {
-       return 0;
+       return false;
 }
 
 static inline void try_offline_node(int nid) {}

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index aa34431..b21d889 100644 (file)
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1410,7 +1410,7 @@ static struct page *next_active_pageblock(struct page *page)
 }
 
 /* Checks if this range of memory is likely to be hot-removable. */
-int is_mem_section_removable(unsigned long start_pfn, unsigned long nr_pages)
+bool is_mem_section_removable(unsigned long start_pfn, unsigned long nr_pages)
 {
        struct page *page = pfn_to_page(start_pfn);
        struct page *end_page = page + nr_pages;
@@ -1418,12 +1418,12 @@ int is_mem_section_removable(unsigned long start_pfn, unsigned long nr_pages)
        /* Check the starting page of each pageblock within the range */
        for (; page < end_page; page = next_active_pageblock(page)) {
                if (!is_pageblock_removable_nolock(page))
-                       return 0;
+                       return false;
                cond_resched();
        }
 
        /* All pageblocks in the memory block are likely to be hot-removable */
-       return 1;
+       return true;
 }
 
 /*