linux-kernel - Re: [PATCH] Documentation: extend use case for EXPORT_SYMBOL

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Date:	Thu, 28 May 2015 21:07:49 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	"Luis R. Rodriguez" <mcgrof@...not-panic.com>
Cc:	corbet@....net, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, mingo@...e.hu,
	gnomes@...rguk.ukuu.org.uk, gregkh@...uxfoundation.org,
	jkosina@...e.cz, bhelgaas@...gle.com, linux-pci@...r.kernel.org,
	xen-devel@...ts.xenproject.org, bp@...e.de,
	"Luis R. Rodriguez" <mcgrof@...e.com>
Subject: Re: [PATCH] Documentation: extend use case for EXPORT_SYMBOL_GPL()

On Thu, May 28, 2015 at 11:56:01AM -0700, Luis R. Rodriguez wrote:
> From: "Luis R. Rodriguez" <mcgrof@...e.com>
> 
> Current documentation over use case for EXPORT_SYMBOL_GPL()
> only acknowledges functions which are "an internal implementation
> issue, and not really an interface". In practice these days
> though we have some maintainers taking on preferences to require
> all new functionality go in with EXPORT_SYMBOL_GPL().
> 
> A maintainer asking developers to use EXPORT_SYMBOL_GPL()
> for new functionality tends to be a well accepted and understood
> position that maintainers can take and typically requires the
> maintainers educating contributing developers on their own
> positions and requirements.
> 
> Developers who submit code to maintainers not familiar with
> these preferences as optional for new functionality need explicit
> guidence though as existing documentation does not acknowledge
> this as a valid possibility. Without this being documented some
> maintainers are reluctant to accept new functionality with
> EXPORT_SYMBOL_GPL().
> 
> This extends the use case documentation for EXPORT_SYMBOL_GPL()
> to acknowledge acceptance for new functionality.
 
... while some of us consider that as pointless posturing and will refuse
to merge such exports regardless.  It's _NOT_ a universal default; please,
do not attempt to imply otherwise.  In particular, for fs/*.c I will not
accept that as valid grounds for use of EXPORT_SYMBOL_GPL.
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