Let's clean it up a bit, simplifying error handling and getting rid of the label.
Reviewed-by: Baoquan He <[email protected]> Reviewed-by: Pankaj Gupta <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Michael S. Tsirkin <[email protected]> Cc: Mike Kravetz <[email protected]> Signed-off-by: David Hildenbrand <[email protected]> --- mm/page_isolation.c | 17 +++++++---------- 1 file changed, 7 insertions(+), 10 deletions(-) diff --git a/mm/page_isolation.c b/mm/page_isolation.c index d099aac479601..e65fe5d770849 100644 --- a/mm/page_isolation.c +++ b/mm/page_isolation.c @@ -17,12 +17,9 @@ static int set_migratetype_isolate(struct page *page, int migratetype, int isol_flags) { - struct page *unmovable = NULL; - struct zone *zone; + struct zone *zone = page_zone(page); + struct page *unmovable; unsigned long flags; - int ret = -EBUSY; - - zone = page_zone(page); spin_lock_irqsave(&zone->lock, flags); @@ -51,13 +48,13 @@ static int set_migratetype_isolate(struct page *page, int migratetype, int isol_ NULL); __mod_zone_freepage_state(zone, -nr_pages, mt); - ret = 0; + spin_unlock_irqrestore(&zone->lock, flags); + drain_all_pages(zone); + return 0; } spin_unlock_irqrestore(&zone->lock, flags); - if (!ret) { - drain_all_pages(zone); - } else if ((isol_flags & REPORT_FAILURE) && unmovable) { + if (isol_flags & REPORT_FAILURE) { /* * printk() with zone->lock held will likely trigger a * lockdep splat, so defer it here. @@ -65,7 +62,7 @@ static int set_migratetype_isolate(struct page *page, int migratetype, int isol_ dump_page(unmovable, "unmovable page"); } - return ret; + return -EBUSY; } static void unset_migratetype_isolate(struct page *page, unsigned migratetype) -- 2.26.2
