linux-kernel - Re: [PATCH v3 03/21] dentry: switch the lists of children to hlist

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Message-ID: <20231124075509.GU38156@ZenIV>
Date:   Fri, 24 Nov 2023 07:55:09 +0000
From:   Al Viro <viro@...iv.linux.org.uk>
To:     Amir Goldstein <amir73il@...il.com>
Cc:     linux-fsdevel@...r.kernel.org,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Christian Brauner <brauner@...nel.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 03/21] dentry: switch the lists of children to hlist

On Fri, Nov 24, 2023 at 09:44:27AM +0200, Amir Goldstein wrote:
> On Fri, Nov 24, 2023 at 8:05 AM Al Viro <viro@...iv.linux.org.uk> wrote:
> >
> > Saves a pointer per struct dentry and actually makes the things less
> > clumsy.  Cleaned the d_walk() and dcache_readdir() a bit by use
> > of hlist_for_... iterators.
> >
> > A couple of new helpers - d_first_child() and d_next_sibling(),
> > to make the expressions less awful.
> >
> > X-fuck-kABI: gladly
> 
> ???

It breaks kABI.  Hard.  For a good reason.  And if you need an elaboration
of the reasons why kABI is, er, not universally liked - let's take it
to private email.  Some rants are really too unprintable for maillists...