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From: Alice Ryhl <aliceryhl@google.com>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: Danilo Krummrich <dakr@kernel.org>,
	rafael@kernel.org, ojeda@kernel.org,  boqun.feng@gmail.com,
	gary@garyguo.net, bjorn3_gh@protonmail.com,  lossin@kernel.org,
	a.hindborg@kernel.org, tmgross@umich.edu,
	 driver-core@lists.linux.dev, rust-for-linux@vger.kernel.org,
	 linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/5] devres: export devres_node_init() and devres_node_add()
Date: Fri, 6 Feb 2026 15:09:09 +0000	[thread overview]
Message-ID: <aYYEFRwotF5AL_Ch@google.com> (raw)
In-Reply-To: <2026020633-foe-etching-e464@gregkh>

On Fri, Feb 06, 2026 at 02:55:50PM +0100, Greg KH wrote:
> On Fri, Feb 06, 2026 at 01:33:53PM +0000, Alice Ryhl wrote:
> > On Fri, Feb 06, 2026 at 02:22:42PM +0100, Greg KH wrote:
> > > On Fri, Feb 06, 2026 at 02:16:05PM +0100, Danilo Krummrich wrote:
> > > > However, sprinkling "raw" EXPORT_SYMBOL_GPL() due to that is not great at all.
> > > > Hence, we could do something like in [1] instead. I don't know if there are
> > > > other options that may be better though.
> > > > 
> > > > [1] https://lore.kernel.org/all/DG7UR3WWZB4V.2MYMJJH1VDHH@kernel.org/
> > > 
> > > That's a start, but still messy.  There's no compiler options to prevent
> > > this "lifting" of the code out of devres.rs?  If not, this is not going
> > > to be the only problem that drivers run into like this in the future.
> > 
> > Because of how monomorphisation, as-is the code actually lives in the
> > module to begin with.
> 
> Ok, but again, that is going to cause all sorts of "the symbol is
> undefined" type of problems going forward as a developers just "assumes"
> that the place where the symbol is exported will actually have the
> symbol exported from it, not that this place will be copied inline into
> somewhere else.
> 
> Think about the interaction between module symbol namespaces here.  This
> isn't going to scale, and will trip people up and cause us to be forced
> to export way more than we really want to (like this patch series shows,
> I don't want to export any of these...)

Hmm. I don't know how to reconcile namespaces operating on symbols with
monomorphisation.

We should probably think about what to do about ... :)

Alice

  parent reply	other threads:[~2026-02-06 15:09 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-02-05 22:31 [PATCH 0/5] Use struct devres_node in Devres<T> Danilo Krummrich
2026-02-05 22:31 ` [PATCH 1/5] devres: move struct devres_node into base.h Danilo Krummrich
2026-02-05 22:31 ` [PATCH 2/5] devres: export devres_node_init() and devres_node_add() Danilo Krummrich
2026-02-06 10:43   ` Danilo Krummrich
2026-02-06 11:04     ` Greg KH
2026-02-06 11:32       ` Danilo Krummrich
2026-02-06 11:34         ` Alice Ryhl
2026-02-06 11:46           ` Danilo Krummrich
2026-02-06 12:34           ` Greg KH
2026-02-06 13:16             ` Danilo Krummrich
2026-02-06 13:20               ` Alice Ryhl
2026-02-06 13:25                 ` Greg KH
2026-02-06 13:33                   ` Danilo Krummrich
2026-02-06 13:35                     ` Alice Ryhl
2026-02-06 13:22               ` Greg KH
2026-02-06 13:33                 ` Alice Ryhl
2026-02-06 13:55                   ` Greg KH
2026-02-06 14:23                     ` Gary Guo
2026-02-06 14:31                       ` Greg KH
2026-02-06 15:09                     ` Alice Ryhl [this message]
2026-02-06 16:31                       ` Alice Ryhl
2026-02-06 14:08                   ` Danilo Krummrich
2026-02-05 22:31 ` [PATCH 3/5] devres: add devres_node_remove() Danilo Krummrich
2026-02-05 22:31 ` [PATCH 4/5] devres: rename and export set_node_dbginfo() Danilo Krummrich
2026-02-05 22:31 ` [PATCH 5/5] rust: devres: embed struct devres_node directly Danilo Krummrich

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