linux-kernel - Re: [PATCH v2 2/7] radix-tree: Use local

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Message-ID: <20200525111114.GB17206@bombadil.infradead.org>
Date:   Mon, 25 May 2020 04:11:14 -0700
From:   Matthew Wilcox <willy@...radead.org>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        linux-kernel@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Will Deacon <will@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH v2 2/7] radix-tree: Use local_lock for protection

On Mon, May 25, 2020 at 08:29:54AM +0200, Ingo Molnar wrote:
> > +void radix_tree_preload_end(void)
> > +{
> > +	local_unlock(&radix_tree_preloads.lock);
> > +}
> > +EXPORT_SYMBOL(radix_tree_preload_end);
> 
> Since upstream we are still mapping the local_lock primitives to
> preempt_disable()/preempt_enable(), I believe these uninlining changes should not be done
> in this patch, i.e. idr_preload_end() and radix_tree_preload_end() should stay inline.

But radix_tree_preloads is static, and I wouldn't be terribly happy to
see that exported to modules.