Re: rcu kernel-doc issues (4.14-rc1)

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On Mon, Oct 16, 2017 at 12:58:28PM -0700, Randy Dunlap wrote:
> Hi Jonathan and Paul,
> 
> Please include these fixes before 4.14 final.

Hello, Randy,

I currently have them queued up for the 4.15 merge window.  Will that
work for you?

							Thanx, Paul

> Thanks.
> 
> On 09/17/17 12:49, Paul E. McKenney wrote:
> > On Sun, Sep 17, 2017 at 10:57:42AM -0700, Randy Dunlap wrote:
> >> On 09/17/17 10:47, Paul E. McKenney wrote:
> >>> On Sat, Sep 16, 2017 at 09:41:45PM -0700, Paul E. McKenney wrote:
> >>>> On Sat, Sep 16, 2017 at 06:26:04PM -0700, Randy Dunlap wrote:
> >>>>> On 4.14-rc1, I am seeing lots of warnings on rcu kernel-doc:
> >>>>>
> >>>>> .. kernel-doc:: include/linux/rcupdate.h
> >>>>>    :external:
> >>>>> ./Documentation/core-api/kernel-api.rst:357: ERROR: Error in "kernel-doc" directive:
> >>>>> unknown option: "external".
> >>>>
> >>>> $ grep external include/linux/rcupdate.h
> >>>>  * by a single external-to-structure RCU-protected pointer, then you may
> >>>>  * external-to-structure pointer -after- you have completely initialized
> >>>>
> >>>> Do these comments somehow qualify as an "external" option?  If so, how
> >>>> do I tell kernel-doc to ignore them?  Or must I reword them to avoid
> >>>> the word "external"?
> >>>>
> >>>>> .. kernel-doc:: include/linux/rcupdate_wait.h
> >>>>>    :external:
> >>>>> ./Documentation/core-api/kernel-api.rst:360: ERROR: Error in "kernel-doc" directive:
> >>>>> unknown option: "external".
> >>>>
> >>>> $ grep external include/linux/rcupdate_wait.h
> >>>>
> >>>> There is no occurrence of the string "external" in this file.  So this
> >>>> "external" option is unknown to me as well.  So, any hints on how I
> >>>> should interpret these error messages?
> >>>
> >>> And thanks to Akira Yokosawa for pointing out my confusion in reading
> >>> these error messages.  The line numbers of course apply to the file
> >>> Documentation/core-api/kernel-api.rst rather than the various RCU
> >>> C-language source files.
> >>>
> >>> The patch below removes the error messages for me.  Is this what you
> >>> had in mind?  (Might need other options at some point, but somewhere
> >>> to start.)
> >>>
> >>
> >> Yes, much better.  Thanks.
> >>
> >> Just some missing kernel-doc on parameters mostly remaining:
> > 
> > I have now fixed a number of these, thank you.
> > 
> > Any hints for how to represent code samples within a "/**" comment?
> > 
> > /home/git/linux-2.6-tip/include/linux/rcupdate.h:559: ERROR: Unexpected indentation.
> > /home/git/linux-2.6-tip/include/linux/rcupdate.h:563: WARNING: Block quote ends without a blank line; unexpected unindent.
> > /home/git/linux-2.6-tip/include/linux/rcupdate.h:777: ERROR: Unexpected indentation.
> > /home/git/linux-2.6-tip/include/linux/rcupdate.h:778: WARNING: Block quote ends without a blank line; unexpected unindent.
> > 
> > 							Thanx, Paul
> > 
> >> ../include/linux/rcupdate.h:818: warning: No description found for parameter 'p'
> >> ../include/linux/rcupdate.h:818: warning: No description found for parameter 'v'
> >> ../include/linux/rcupdate.h:826: warning: No description found for parameter 'p'
> >> ../include/linux/rcupdate.h:826: warning: No description found for parameter 'v'
> >> ../include/linux/srcu.h:95: warning: No description found for parameter 'sp'
> >> ../kernel/rcu/srcutree.c:873: warning: No description found for parameter 'rhp'
> >> ../kernel/rcu/srcutree.c:873: warning: Excess function parameter 'head' description in 'call_srcu'
> >> ../include/linux/rculist.h:302: warning: Incorrect use of kernel-doc format:  * list_first_or_null_rcu - get the first element from a list
> >> ../include/linux/rculist.h:317: warning: No description found for parameter 'ptr'
> >> ../include/linux/rculist.h:317: warning: No description found for parameter 'type'
> >> ../include/linux/rculist.h:317: warning: No description found for parameter 'member'
> >> ../kernel/rcu/sync.c:94: warning: No description found for parameter 'rsp'
> >> ../kernel/rcu/sync.c:162: warning: No description found for parameter 'rcu'
> >> ../kernel/rcu/sync.c:162: warning: Excess function parameter 'rsp' description in 'rcu_sync_func'
> >>
> >>>
> >>> ------------------------------------------------------------------------
> >>>
> >>> diff --git a/Documentation/core-api/kernel-api.rst b/Documentation/core-api/kernel-api.rst
> >>> index 8282099e0cbf..30b2666bf494 100644
> >>> --- a/Documentation/core-api/kernel-api.rst
> >>> +++ b/Documentation/core-api/kernel-api.rst
> >>> @@ -352,44 +352,44 @@ Read-Copy Update (RCU)
> >>>  ----------------------
> >>>  
> >>>  .. kernel-doc:: include/linux/rcupdate.h
> >>> -   :external:
> >>> +   :export
> >>>  
> >>>  .. kernel-doc:: include/linux/rcupdate_wait.h
> >>> -   :external:
> >>> +   :export
> >>>  
> >>>  .. kernel-doc:: include/linux/rcutree.h
> >>> -   :external:
> >>> +   :export
> >>>  
> >>>  .. kernel-doc:: kernel/rcu/tree.c
> >>> -   :external:
> >>> +   :export
> >>>  
> >>>  .. kernel-doc:: kernel/rcu/tree_plugin.h
> >>> -   :external:
> >>> +   :export
> >>>  
> >>>  .. kernel-doc:: kernel/rcu/tree_exp.h
> >>> -   :external:
> >>> +   :export
> >>>  
> >>>  .. kernel-doc:: kernel/rcu/update.c
> >>> -   :external:
> >>> +   :export
> >>>  
> >>>  .. kernel-doc:: include/linux/srcu.h
> >>> -   :external:
> >>> +   :export
> >>>  
> >>>  .. kernel-doc:: kernel/rcu/srcutree.c
> >>> -   :external:
> >>> +   :export
> >>>  
> >>>  .. kernel-doc:: include/linux/rculist_bl.h
> >>> -   :external:
> >>> +   :export
> >>>  
> >>>  .. kernel-doc:: include/linux/rculist.h
> >>> -   :external:
> >>> +   :export
> >>>  
> >>>  .. kernel-doc:: include/linux/rculist_nulls.h
> >>> -   :external:
> >>> +   :export
> >>>  
> >>>  .. kernel-doc:: include/linux/rcu_sync.h
> >>> -   :external:
> >>> +   :export
> >>>  
> >>>  .. kernel-doc:: kernel/rcu/sync.c
> >>> -   :external:
> >>> +   :export
> 
> 
> -- 
> ~Randy
> 

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