Thanks a lot for the suggestions so far and for the review, Minchan! Quick question about your last comment: >> +#ifdef CONFIG_ZPOOL > > Let's remove the ifdef machinery here. > >> + /* Free all deferred handles from zs_free */ >> + free_handles(pool, zspage); >> +#endif free_handles() here is for the deferred handle freeing, which is also under CONFIG_ZPOOL now, so I don't think we should remove the #ifdef CONFIG_ZPOOL here, no? Let me know if I'm misunderstanding your suggestion, or if you have any further comments regarding this patch.