linux-kernel - Re: [GIT PULL] block-bio_iov_iter

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Message-ID: <aPZNC8bKIzRmFJ21@infradead.org>
Date: Mon, 20 Oct 2025 07:54:03 -0700
From: Christoph Hellwig <hch@...radead.org>
To: Kent Overstreet <kent.overstreet@...ux.dev>
Cc: Christoph Hellwig <hch@...radead.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Jens Axboe <axboe@...nel.dk>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-block@...r.kernel.org
Subject: Re: [GIT PULL] block-bio_iov_iter_export

On Mon, Oct 20, 2025 at 10:49:57AM -0400, Kent Overstreet wrote:
> Christoph, I don't know what you're claiming here. I see no tweaks in
> the original patch, that's all code I wrote.

Then look closer.

> There was no need for you to drop the EXPORT_SYMBOL.
> What I want to know is, is this going to become a pattern?

Of course there was.  The kernel doesn't keep unused code around,
including symbols.  So anything that is unused will eventually be
garbage collected.  There's even folks around that run scripts and
automate it (David Alan Gilbert is the most active one currently).

> I can vendorize this one function, but If you're going to make a habit
> of ripping out exports and functionality bcachefs depends on, I can't
> expect I'll always be able to.

I'm not sure why you're turning this personal and singling me out.
Yes, unused exports and code are removed all the time, and that's a
feature and not a bug.