Re: [PATCH v2] exfat: check disk status during buffer write

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> +static int exfat_block_device_ejected(struct super_block *sb)
> +{
> +	struct backing_dev_info *bdi = sb->s_bdi;
> +
> +	return bdi->dev == NULL;
> +}

NAK, file systems have no business looking at this.  What you probably
really want is to implement the ->shutdown method for exfat so it gets
called on device removal.





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