dbg_userword     1493 mm/slab.c      		pr_err("Last user: (%pSR)\n", *dbg_userword(cachep, objp));
dbg_userword     2340 mm/slab.c      			*dbg_userword(cachep, objp) = NULL;
dbg_userword     2731 mm/slab.c      		*dbg_userword(cachep, objp) = (void *)caller;
dbg_userword     3009 mm/slab.c      		*dbg_userword(cachep, objp) = (void *)caller;