From: Ralph Campbell <rcampbell@xxxxxxxxxx> Subject: mm/migrate: remove cpages-- in migrate_vma_finalize() The variable struct migrate_vma->cpages is only used in migrate_vma_setup(). There is no need to decrement it in migrate_vma_finalize() since it is never checked. Link: http://lkml.kernel.org/r/20200827190735.12752-1-rcampbell@xxxxxxxxxx Signed-off-by: Ralph Campbell <rcampbell@xxxxxxxxxx> Cc: Jason Gunthorpe <jgg@xxxxxxxxxx> Cc: Jerome Glisse <jglisse@xxxxxxxxxx> Cc: John Hubbard <jhubbard@xxxxxxxxxx> Cc: Christoph Hellwig <hch@xxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/migrate.c | 1 - 1 file changed, 1 deletion(-) --- a/mm/migrate.c~mm-migrate-remove-cpages-in-migrate_vma_finalize +++ a/mm/migrate.c @@ -3077,7 +3077,6 @@ void migrate_vma_finalize(struct migrate remove_migration_ptes(page, newpage, false); unlock_page(page); - migrate->cpages--; if (is_zone_device_page(page)) put_page(page); _
