linux-kernel - [PATCH 2/5] mm/memory_hotplug: is_mem_section

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Date:	Wed, 23 Mar 2016 10:26:06 +0800
From:	Yaowei Bai <baiyaowei@...s.chinamobile.com>
To:	akpm@...ux-foundation.org
Cc:	n-horiguchi@...jp.nec.com, kirill.shutemov@...ux.intel.com,
	rientjes@...gle.com, iamjoonsoo.kim@....com, hannes@...xchg.org,
	vdavydov@...tuozzo.com, kuleshovmail@...il.com, vbabka@...e.cz,
	mgorman@...hsingularity.net, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, baiyaowei@...s.chinamobile.com
Subject: [PATCH 2/5] mm/memory_hotplug: is_mem_section_removable can be boolean

This patch makes is_mem_section_removable return bool to improve
readability due to this particular function only using either
one or zero as its return value.

No functional change.

Signed-off-by: Yaowei Bai <baiyaowei@...s.chinamobile.com>
---
 include/linux/memory_hotplug.h | 6 +++---
 mm/memory_hotplug.c            | 6 +++---
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
index adbef58..20d8a5d 100644
--- 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 24ea063..87be160 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1406,7 +1406,7 @@ 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;
@@ -1414,12 +1414,12 @@ 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;
 }
 
 /*
-- 
1.9.1