mtd: use vzalloc

Signed-off-by: Joe Perches <[e-mail]>
Signed-off-by: Artem Bityutskiy <[e-mail]>
Signed-off-by: David Woodhouse <[e-mail]>

drivers/mtd/nand/nandsim.c

···
 			err = -EINVAL;
 			goto err_close;
 		}
-		ns->pages_written = vmalloc(ns->geom.pgnum);
+		ns->pages_written = vzalloc(ns->geom.pgnum);
 		if (!ns->pages_written) {
 			NS_ERR("alloc_device: unable to allocate pages written array\n");
 			err = -ENOMEM;
···
 			goto err_free;
 		}
 		ns->cfile = cfile;
-		memset(ns->pages_written, 0, ns->geom.pgnum);
 		return 0;
 	}
 

drivers/mtd/ubi/vtbl.c

···
 
 	/* Read both LEB 0 and LEB 1 into memory */
 	ubi_rb_for_each_entry(rb, seb, &sv->root, u.rb) {
-		leb[seb->lnum] = vmalloc(ubi->vtbl_size);
+		leb[seb->lnum] = vzalloc(ubi->vtbl_size);
 		if (!leb[seb->lnum]) {
 			err = -ENOMEM;
 			goto out_free;
 		}
-		memset(leb[seb->lnum], 0, ubi->vtbl_size);
 
 		err = ubi_io_read_data(ubi, leb[seb->lnum], seb->pnum, 0,
 				       ubi->vtbl_size);
···
 	int i;
 	struct ubi_vtbl_record *vtbl;
 
-	vtbl = vmalloc(ubi->vtbl_size);
+	vtbl = vzalloc(ubi->vtbl_size);
 	if (!vtbl)
 		return ERR_PTR(-ENOMEM);
-	memset(vtbl, 0, ubi->vtbl_size);
 
 	for (i = 0; i < ubi->vtbl_slots; i++)
 		memcpy(&vtbl[i], &empty_vtbl_record, UBI_VTBL_RECORD_SIZE);