mm: migrate: move migrate_page_lock_buffers()
buffer_migrate_page() is the only caller of migrate_page_lock_buffers() move it close to it and also drop the now unused stub for !CONFIG_BLOCK. Link: http://lkml.kernel.org/r/20181211172143.7358-4-jack@suse.czSigned-off-by: NJan Kara <jack@suse.cz> Acked-by: NMel Gorman <mgorman@suse.de> Cc: Michal Hocko <mhocko@suse.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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