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mm/compaction.c: fix warning of 'flags' may be used uninitialized
C mm/compaction.o mm/compaction.c: In function isolate_freepages_block: mm/compaction.c:364:37: warning: flags may be used uninitialized in this function [-Wmaybe-uninitialized] && compact_unlock_should_abort(&cc->zone->lock, flags, ^ Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Mel Gorman <mgorman@suse.de> Cc: David Rientjes <rientjes@google.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -344,7 +344,7 @@ static unsigned long isolate_freepages_block(struct compact_control *cc,
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{
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int nr_scanned = 0, total_isolated = 0;
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struct page *cursor, *valid_page = NULL;
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unsigned long flags;
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unsigned long flags = 0;
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bool locked = false;
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unsigned long blockpfn = *start_pfn;
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@ -570,7 +570,7 @@ isolate_migratepages_block(struct compact_control *cc, unsigned long low_pfn,
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unsigned long nr_scanned = 0, nr_isolated = 0;
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struct list_head *migratelist = &cc->migratepages;
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struct lruvec *lruvec;
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unsigned long flags;
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unsigned long flags = 0;
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bool locked = false;
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struct page *page = NULL, *valid_page = NULL;
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