linux-kernel - Re: linux-next: build warning after merge of the rcu tree

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Message-ID: <20201207185346.GJ2657@paulmck-ThinkPad-P72>
Date:   Mon, 7 Dec 2020 10:53:46 -0800
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     Jonathan Corbet <corbet@....net>
Cc:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: linux-next: build warning after merge of the rcu tree

On Mon, Dec 07, 2020 at 10:48:51AM -0700, Jonathan Corbet wrote:
> On Mon, 7 Dec 2020 08:47:04 -0800
> "Paul E. McKenney" <paulmck@...nel.org> wrote:
> 
> > I freely confess that I have absolutely no idea what it doesn't like.
> > It is complaining about this header comment, correct?
> > 
> > /**
> >  * kmem_last_alloc_stack - Get return address and stack for last allocation
> >  * @object: object for which to find last-allocation return address.
> >  * @stackp: %NULL or pointer to location to place return-address stack.
> >  * @nstackp: maximum number of return addresses that may be stored.
> >  *
> >  * If the pointer references a slab-allocated object and if sufficient
> >  * debugging is enabled, return the return address for the corresponding
> >  * allocation.  If stackp is non-%NULL in %CONFIG_STACKTRACE kernels running
> >  * the slub allocator, also copy the return-address stack into @stackp,
> >  * limited by @nstackp.  Otherwise, return %NULL or an appropriate error
> >  * code using %ERR_PTR().
> >  *
> >  * Return: return address from last allocation, %NULL or negative error code.
> >  */
> 
> The problem is the %ERR_PTR().  I'm honestly not quite sure why, Sphinx is
> being a little weird there.  But in any case the % notation is supposed to
> mark a constant, which is not the case here.  I'd just take the % signs
> out.

Thank you, will do!

							Thanx, Paul