linux-kernel - Re: [PATCH 05/18] docs: core-api: add cachetlb documentation

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Message-ID: <20180508160242.GA5469@andrea>
Date:   Tue, 8 May 2018 18:02:42 +0200
From:   Andrea Parri <andrea.parri@...rulasolutions.com>
To:     Jani Nikula <jani.nikula@...ux.intel.com>
Cc:     Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Linux Doc Mailing List <linux-doc@...r.kernel.org>,
        Mauro Carvalho Chehab <mchehab@...radead.org>,
        linux-kernel@...r.kernel.org, Jonathan Corbet <corbet@....net>,
        Alan Stern <stern@...land.harvard.edu>,
        Andrea Parri <parri.andrea@...il.com>,
        Will Deacon <will.deacon@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        Boqun Feng <boqun.feng@...il.com>,
        Nicholas Piggin <npiggin@...il.com>,
        David Howells <dhowells@...hat.com>,
        Jade Alglave <j.alglave@....ac.uk>,
        Luc Maranget <luc.maranget@...ia.fr>,
        "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
        Akira Yokosawa <akiyks@...il.com>,
        Matthew Wilcox <mawilcox@...rosoft.com>,
        Jeff Layton <jlayton@...hat.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Elena Reshetova <elena.reshetova@...el.com>,
        "Tobin C. Harding" <me@...in.cc>,
        SeongJae Park <sj38.park@...il.com>,
        Ingo Molnar <mingo@...nel.org>,
        Helmut Grohne <h.grohne@...enta.de>
Subject: Re: [PATCH 05/18] docs: core-api: add cachetlb documentation

Hi Jani,

On Tue, May 08, 2018 at 05:40:56PM +0300, Jani Nikula wrote:
> On Mon, 07 May 2018, Andrea Parri <andrea.parri@...rulasolutions.com> wrote:
> > On Mon, May 07, 2018 at 06:35:41AM -0300, Mauro Carvalho Chehab wrote:
> >> The cachetlb.txt is already in ReST format. So, move it to the
> >> core-api guide, where it belongs.
> >> 
> >> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
> >> ---
> >>  Documentation/00-INDEX                                | 2 --
> >>  Documentation/{cachetlb.txt => core-api/cachetlb.rst} | 0
> >>  Documentation/core-api/index.rst                      | 1 +
> >>  Documentation/memory-barriers.txt                     | 2 +-
> >>  Documentation/translations/ko_KR/memory-barriers.txt  | 2 +-
> >>  5 files changed, 3 insertions(+), 4 deletions(-)
> >>  rename Documentation/{cachetlb.txt => core-api/cachetlb.rst} (100%)
> >
> > I see a few "inline" references to the .txt file in -rc4 (see below):
> > I am not sure if you managed to update them too.
> 
> Side note, there's scripts/documentation-file-ref-check to grep the
> kernel tree for things that look like file references to Documentation/*
> and complain if they don't exist.
> 
> I get about 350+ hits with that, patches welcome! ;)

Thanks for pointing out the script/results.

It's also worth stressing, I think, the fact that some of those are from
the MAINTAINERS file; I stumbled accross one of them yesterday:

  http://lkml.kernel.org/r/1525707655-3542-1-git-send-email-andrea.parri@amarulasolutions.com

False positives apart (e.g., the four references in tools/memory-model/),
those are regressions from my POV: please do not (consiously) merge more!

  Andrea


> 
> 
> BR,
> Jani.
> 
> 
> >
> > ./arch/microblaze/include/asm/cacheflush.h:/* Look at Documentation/cachetlb.txt */
> > ./arch/unicore32/include/asm/cacheflush.h: *	See Documentation/cachetlb.txt for more information.
> > ./arch/arm64/include/asm/cacheflush.h: *	See Documentation/cachetlb.txt for more information. Please note that
> > ./arch/arm/include/asm/cacheflush.h: *	See Documentation/cachetlb.txt for more information.
> > ./arch/xtensa/include/asm/cacheflush.h: * (see also Documentation/cachetlb.txt)
> > ./arch/xtensa/include/asm/cacheflush.h:/* This is not required, see Documentation/cachetlb.txt */
> >
> >   Andrea
> >
> >
> >> 
> >> diff --git a/Documentation/00-INDEX b/Documentation/00-INDEX
> >> index 53699c79ee54..04074059bcdc 100644
> >> --- a/Documentation/00-INDEX
> >> +++ b/Documentation/00-INDEX
> >> @@ -76,8 +76,6 @@ bus-devices/
> >>  	- directory with info on TI GPMC (General Purpose Memory Controller)
> >>  bus-virt-phys-mapping.txt
> >>  	- how to access I/O mapped memory from within device drivers.
> >> -cachetlb.txt
> >> -	- describes the cache/TLB flushing interfaces Linux uses.
> >>  cdrom/
> >>  	- directory with information on the CD-ROM drivers that Linux has.
> >>  cgroup-v1/
> >> diff --git a/Documentation/cachetlb.txt b/Documentation/core-api/cachetlb.rst
> >> similarity index 100%
> >> rename from Documentation/cachetlb.txt
> >> rename to Documentation/core-api/cachetlb.rst
> >> diff --git a/Documentation/core-api/index.rst b/Documentation/core-api/index.rst
> >> index c670a8031786..d4d71ee564ae 100644
> >> --- a/Documentation/core-api/index.rst
> >> +++ b/Documentation/core-api/index.rst
> >> @@ -14,6 +14,7 @@ Core utilities
> >>     kernel-api
> >>     assoc_array
> >>     atomic_ops
> >> +   cachetlb
> >>     refcount-vs-atomic
> >>     cpu_hotplug
> >>     idr
> >> diff --git a/Documentation/memory-barriers.txt b/Documentation/memory-barriers.txt
> >> index 6dafc8085acc..983249906fc6 100644
> >> --- a/Documentation/memory-barriers.txt
> >> +++ b/Documentation/memory-barriers.txt
> >> @@ -2903,7 +2903,7 @@ is discarded from the CPU's cache and reloaded.  To deal with this, the
> >>  appropriate part of the kernel must invalidate the overlapping bits of the
> >>  cache on each CPU.
> >>  
> >> -See Documentation/cachetlb.txt for more information on cache management.
> >> +See Documentation/core-api/cachetlb.rst for more information on cache management.
> >>  
> >>  
> >>  CACHE COHERENCY VS MMIO
> >> diff --git a/Documentation/translations/ko_KR/memory-barriers.txt b/Documentation/translations/ko_KR/memory-barriers.txt
> >> index 0a0930ab4156..081937577c1a 100644
> >> --- a/Documentation/translations/ko_KR/memory-barriers.txt
> >> +++ b/Documentation/translations/ko_KR/memory-barriers.txt
> >> @@ -2846,7 +2846,7 @@ CPU 의 캐시에서 RAM 으로 쓰여지는 더티 캐시 라인에 의해 덮
> >>  문제를 해결하기 위해선, 커널의 적절한 부분에서 각 CPU 의 캐시 안의 문제가 되는
> >>  비트들을 무효화 시켜야 합니다.
> >>  
> >> -캐시 관리에 대한 더 많은 정보를 위해선 Documentation/cachetlb.txt 를
> >> +캐시 관리에 대한 더 많은 정보를 위해선 Documentation/core-api/cachetlb.rst 를
> >>  참고하세요.
> >>  
> >>  
> >> -- 
> >> 2.17.0
> >> 
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-doc" in
> > the body of a message to majordomo@...r.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 
> -- 
> Jani Nikula, Intel Open Source Technology Center