suitable_migration_target() is only used by isolate_freepages()
Define it under CONFIG_COMPACTION || CONFIG_CMA is not needed.
Fix the following warning:
mm/compaction.c:311:13: warning: 'suitable_migration_target' defined
but not used [-Wunused-function]
Signed-off-by: Fabian Frederick <f...@skynet.be>
---
mm/compaction.c | 44 ++++++++++++++++++++++----------------------
1 file changed, 22 insertions(+), 22 deletions(-)
diff --git a/mm/compaction.c b/mm/compaction.c
index 546e571..38b151c 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -307,28 +307,6 @@ static inline bool compact_should_abort(struct
compact_control *cc)
return false;
}
-/* Returns true if the page is within a block suitable for migration to */
-static bool suitable_migration_target(struct page *page)
-{
- /* If the page is a large free page, then disallow migration */
- if (PageBuddy(page)) {
- /*
- * We are checking page_order without zone->lock taken. But
- * the only small danger is that we skip a potentially suitable
- * pageblock, so it's not worth to check order for valid range.
- */
- if (page_order_unsafe(page) >= pageblock_order)
- return false;
- }
-
- /* If the block is MIGRATE_MOVABLE or MIGRATE_CMA, allow migration */
- if (migrate_async_suitable(get_pageblock_migratetype(page)))
- return true;
-
- /* Otherwise skip the block */
- return false;
-}
-
/*
* Isolate free pages onto a private freelist. If @strict is true, will abort
* returning 0 on any invalid PFNs or non-free pages inside of the pageblock
@@ -802,6 +780,28 @@ isolate_migratepages_range(struct compact_control *cc,
unsigned long start_pfn,
#endif /* CONFIG_COMPACTION || CONFIG_CMA */
#ifdef CONFIG_COMPACTION
+/* Returns true if the page is within a block suitable for migration to */
+static bool suitable_migration_target(struct page *page)
+{
+ /* If the page is a large free page, then disallow migration */
+ if (PageBuddy(page)) {
+ /*
+ * We are checking page_order without zone->lock taken. But
+ * the only small danger is that we skip a potentially suitable
+ * pageblock, so it's not worth to check order for valid range.
+ */
+ if (page_order_unsafe(page) >= pageblock_order)
+ return false;
+ }
+
+ /* If the block is MIGRATE_MOVABLE or MIGRATE_CMA, allow migration */
+ if (migrate_async_suitable(get_pageblock_migratetype(page)))
+ return true;
+
+ /* Otherwise skip the block */
+ return false;
+}
+
/*
* Based on information in the current compact_control, find blocks
* suitable for isolating free pages from and then isolate them.
--
2.1.0
--
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