From: Chen Gang <chengang@xxxxxxxxxxxxxxxx>
For pure bool function's return value, bool is a little better more or
less than int.
And return boolean result directly, since 'if' statement is also for
boolean checking, and return boolean result, too.
Signed-off-by: Chen Gang <gang.chen.5i5j@xxxxxxxxx>
---
include/linux/migrate.h | 4 ++--
mm/compaction.c | 9 +++------
2 files changed, 5 insertions(+), 8 deletions(-)
diff --git a/include/linux/migrate.h b/include/linux/migrate.h
index ae8d475..0e366f8 100644
--- a/include/linux/migrate.h
+++ b/include/linux/migrate.h
@@ -72,11 +72,11 @@ static inline int migrate_huge_page_move_mapping(struct address_space *mapping,
#endif /* CONFIG_MIGRATION */
#ifdef CONFIG_COMPACTION
-extern int PageMovable(struct page *page);
+extern bool PageMovable(struct page *page);
extern void __SetPageMovable(struct page *page, struct address_space *mapping);
extern void __ClearPageMovable(struct page *page);
#else
-static inline int PageMovable(struct page *page) { return 0; };
+static inline bool PageMovable(struct page *page) { return false; };
static inline void __SetPageMovable(struct page *page,
struct address_space *mapping)
{
diff --git a/mm/compaction.c b/mm/compaction.c
index 0bd53fb..cfcfe88 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -95,19 +95,16 @@ static inline bool migrate_async_suitable(int migratetype)
#ifdef CONFIG_COMPACTION
-int PageMovable(struct page *page)
+bool PageMovable(struct page *page)
{
struct address_space *mapping;
VM_BUG_ON_PAGE(!PageLocked(page), page);
if (!__PageMovable(page))
- return 0;
+ return false;
mapping = page_mapping(page);
- if (mapping && mapping->a_ops && mapping->a_ops->isolate_page)
- return 1;
-
- return 0;
+ return mapping && mapping->a_ops && mapping->a_ops->isolate_page;
}
EXPORT_SYMBOL(PageMovable);
--
1.9.3
--
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