On 10/26/2024 3:06 AM, Keith Busch wrote:
> +static ssize_t part_write_hint_mask_store(struct device *dev,
> + struct device_attribute *attr,
> + const char *buf, size_t count)
> +{
> + struct block_device *bdev = dev_to_bdev(dev);
> + unsigned short max_write_hints = bdev_max_write_hints(bdev);
> + unsigned long *new_mask;
> + int size;
> +
> + if (!max_write_hints)
> + return count;
> +
> + size = BITS_TO_LONGS(max_write_hints) * sizeof(long);
> + new_mask = kzalloc(size, GFP_KERNEL);
> + if (!new_mask)
> + return -ENOMEM;
> +
> + bitmap_parse(buf, count, new_mask, max_write_hints);
> + bitmap_copy(bdev->write_hint_mask, new_mask, max_write_hints);
kfree(new_mask) here.
