linux-kernel - Re: linux-next: Tree for Sep 27 (uml 64-bit or 32-bit: tinyconfig)

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Date:   Tue, 27 Sep 2022 23:25:00 -0700
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     broonie@...nel.org,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-um <linux-um@...ts.infradead.org>
Subject: Re: linux-next: Tree for Sep 27 (uml 64-bit or 32-bit: tinyconfig)

On Tue, Sep 27, 2022 at 08:27:13PM -0700, Randy Dunlap wrote:
> Hi Paul,
> 
> On 9/27/22 15:42, Paul E. McKenney wrote:
> > On Tue, Sep 27, 2022 at 02:33:19PM -0700, Randy Dunlap wrote:
> >>
> >>
> >> On 9/27/22 14:28, Paul E. McKenney wrote:
> >>> On Tue, Sep 27, 2022 at 02:13:29PM -0700, Randy Dunlap wrote:
> >>>>
> >>>>
> >>>> On 9/27/22 13:10, broonie@...nel.org wrote:
> >>>>> Hi all,
> >>>>>
> >>>>> Changes since 20220923:
> >>>>>
> >>>>
> >>>> In file included from ../include/linux/notifier.h:16,
> >>>>                  from ../include/linux/memory_hotplug.h:7,
> >>>>                  from ../include/linux/mmzone.h:1244,
> >>>>                  from ../include/linux/gfp.h:7,
> >>>>                  from ../include/linux/slab.h:15,
> >>>>                  from ../include/linux/crypto.h:20,
> >>>>                  from ../arch/x86/um/shared/sysdep/kernel-offsets.h:5,
> >>>>                  from ../arch/um/kernel/asm-offsets.c:1:
> >>>> ../include/linux/srcu.h: In function ‘srcu_read_lock_nmisafe’:
> >>>> ../include/linux/srcu.h:181:26: error: implicit declaration of function ‘__srcu_read_lock_nmisafe’; did you mean ‘srcu_read_lock_nmisafe’? [-Werror=implicit-function-declaration]
> >>>>   181 |                 retval = __srcu_read_lock_nmisafe(ssp, true);
> >>>>       |                          ^~~~~~~~~~~~~~~~~~~~~~~~
> >>>>       |                          srcu_read_lock_nmisafe
> >>>> ../include/linux/srcu.h: In function ‘srcu_read_unlock_nmisafe’:
> >>>> ../include/linux/srcu.h:226:17: error: implicit declaration of function ‘__srcu_read_unlock_nmisafe’; did you mean ‘srcu_read_unlock_nmisafe’? [-Werror=implicit-function-declaration]
> >>>>   226 |                 __srcu_read_unlock_nmisafe(ssp, idx, true);
> >>>>       |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~
> >>>>       |                 srcu_read_unlock_nmisafe
> >>>
> >>> Could you please send your .config or tell me how you generated it?
> >>
> >>
> >> For x86_64 SUBARCH, ARCH=um:
> >>
> >> mkdir UML64
> >> make ARCH=um SUBARCH=x86_64 O=UML64 tinyconfig
> >> make ARCH=um SUBARCH=x86_64 O=UML64 all
> > 
> > Thank you!  The diff shown below clears it up for me.  Does it cover it
> > for you as well?
> 
> Works for me. Thanks.
> Acked-by: Randy Dunlap <rdunlap@...radead.org> # build-tested

Thank you, Randy!

							Thanx, Paul

> > ------------------------------------------------------------------------
> > 
> > diff --git a/include/linux/srcu.h b/include/linux/srcu.h
> > index 274d7200ce4e..565f60d57484 100644
> > --- a/include/linux/srcu.h
> > +++ b/include/linux/srcu.h
> > @@ -52,6 +52,8 @@ int init_srcu_struct(struct srcu_struct *ssp);
> >  #else
> >  /* Dummy definition for things like notifiers.  Actual use gets link error. */
> >  struct srcu_struct { };
> > +int __srcu_read_lock_nmisafe(struct srcu_struct *ssp, bool chknmisafe) __acquires(ssp);
> > +void __srcu_read_unlock_nmisafe(struct srcu_struct *ssp, int idx, bool chknmisafe) __releases(ssp);
> >  #endif
> >  
> >  void call_srcu(struct srcu_struct *ssp, struct rcu_head *head,
> 
> -- 
> ~Randy