mm/compaction.c: fix "suitable_migration_target() unused" warning
mm/compaction.c:250:13: warning: 'suitable_migration_target' defined but not used [-Wunused-function] Reported-by: Fengguang Wu <fengguang.wu@gmail.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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1 changed files with 23 additions and 22 deletions
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@ -391,28 +391,6 @@ static inline bool compact_should_abort(struct compact_control *cc)
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return false;
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return false;
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}
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}
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/* Returns true if the page is within a block suitable for migration to */
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static bool suitable_migration_target(struct page *page)
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{
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/* If the page is a large free page, then disallow migration */
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if (PageBuddy(page)) {
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/*
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* We are checking page_order without zone->lock taken. But
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* the only small danger is that we skip a potentially suitable
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* pageblock, so it's not worth to check order for valid range.
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*/
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if (page_order_unsafe(page) >= pageblock_order)
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return false;
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}
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/* If the block is MIGRATE_MOVABLE or MIGRATE_CMA, allow migration */
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if (migrate_async_suitable(get_pageblock_migratetype(page)))
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return true;
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/* Otherwise skip the block */
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return false;
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}
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/*
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/*
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* Isolate free pages onto a private freelist. If @strict is true, will abort
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* Isolate free pages onto a private freelist. If @strict is true, will abort
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* returning 0 on any invalid PFNs or non-free pages inside of the pageblock
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* returning 0 on any invalid PFNs or non-free pages inside of the pageblock
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@ -896,6 +874,29 @@ isolate_migratepages_range(struct compact_control *cc, unsigned long start_pfn,
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#endif /* CONFIG_COMPACTION || CONFIG_CMA */
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#endif /* CONFIG_COMPACTION || CONFIG_CMA */
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#ifdef CONFIG_COMPACTION
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#ifdef CONFIG_COMPACTION
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/* Returns true if the page is within a block suitable for migration to */
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static bool suitable_migration_target(struct page *page)
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{
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/* If the page is a large free page, then disallow migration */
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if (PageBuddy(page)) {
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/*
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* We are checking page_order without zone->lock taken. But
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* the only small danger is that we skip a potentially suitable
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* pageblock, so it's not worth to check order for valid range.
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*/
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if (page_order_unsafe(page) >= pageblock_order)
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return false;
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}
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/* If the block is MIGRATE_MOVABLE or MIGRATE_CMA, allow migration */
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if (migrate_async_suitable(get_pageblock_migratetype(page)))
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return true;
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/* Otherwise skip the block */
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return false;
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}
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/*
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/*
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* Based on information in the current compact_control, find blocks
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* Based on information in the current compact_control, find blocks
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* suitable for isolating free pages from and then isolate them.
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* suitable for isolating free pages from and then isolate them.
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