atm: he: Use the bitmap API to allocate bitmaps

Use bitmap_zalloc()/bitmap_free() instead of hand-writing them.

It is less verbose and it improves the semantic.

Signed-off-by: Christophe JAILLET <[e-mail]>
Link: https://lore.kernel.org/r/7f795bd6d5[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/atm/he.c

···
 		  G0_RBPS_BS + (group * 32));
 
 	/* bitmap table */
-	he_dev->rbpl_table = kmalloc_array(BITS_TO_LONGS(RBPL_TABLE_SIZE),
-					   sizeof(*he_dev->rbpl_table),
-					   GFP_KERNEL);
+	he_dev->rbpl_table = bitmap_zalloc(RBPL_TABLE_SIZE, GFP_KERNEL);
 	if (!he_dev->rbpl_table) {
 		hprintk("unable to allocate rbpl bitmap table\n");
 		return -ENOMEM;
 	}
-	bitmap_zero(he_dev->rbpl_table, RBPL_TABLE_SIZE);
 
 	/* rbpl_virt 64-bit pointers */
 	he_dev->rbpl_virt = kmalloc_array(RBPL_TABLE_SIZE,
···
 out_free_rbpl_virt:
 	kfree(he_dev->rbpl_virt);
 out_free_rbpl_table:
-	kfree(he_dev->rbpl_table);
+	bitmap_free(he_dev->rbpl_table);
 
 	return -ENOMEM;
 }
···
 	}
 
 	kfree(he_dev->rbpl_virt);
-	kfree(he_dev->rbpl_table);
+	bitmap_free(he_dev->rbpl_table);
 	dma_pool_destroy(he_dev->rbpl_pool);
 
 	if (he_dev->rbrq_base)