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Date: Thu, 19 Oct 2017 00:35:51 -0700
From: Christoph Hellwig <hch@infradead.org>
Subject: Re: [PATCH V2] xfs: implement cgroup writeback support
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To: Shaohua Li <shli@kernel.org>
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> -		wpc->ioend = xfs_alloc_ioend(inode, wpc->io_type, offset, bh);
> +		wpc->ioend = xfs_alloc_ioend(inode, wpc->io_type, offset, bh, wbc);

Too long line, please fix.

> +	sb->s_iflags |= SB_I_CGROUPWB;

Didn't Tejun just change this to a per-inode flag?