Re: [RFC PATCH v4 3/8] iomap: pass blocksize to iomap_truncate_page()

[Christoph Hellwig]

> -		const struct iomap_ops *ops)
> +iomap_truncate_page(struct inode *inode, loff_t pos, unsigned int blocksize,
> +		bool *did_zero, const struct iomap_ops *ops)
>  {
> -	unsigned int blocksize = i_blocksize(inode);
> -	unsigned int off = pos & (blocksize - 1);
> +	unsigned int off = rem_u64(pos, blocksize);
>  
>  	/* Block boundary? Nothing to do */
>  	if (!off)

Instad of passing yet another argument here, can we just kill
iomap_truncate_page?

I.e. just open code the rem_u64 and 0 offset check in the only caller
and call iomap_zero_range.  Same for the DAX variant and it's two
callers.