linux-kernel - Re: [PATCH V2 05/11] {x86,powerpc,microblaze}/kmap: Move preempt disable

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Date:   Wed, 6 May 2020 13:25:14 -0700
From:   Ira Weiny <ira.weiny@...el.com>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Christian Koenig <christian.koenig@....com>,
        Huang Rui <ray.huang@....com>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        "James E.J. Bottomley" <James.Bottomley@...senpartnership.com>,
        Helge Deller <deller@....de>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        "David S. Miller" <davem@...emloft.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Chris Zankel <chris@...kel.net>,
        Max Filippov <jcmvbkbc@...il.com>,
        Dan Williams <dan.j.williams@...el.com>,
        linux-snps-arc@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-csky@...r.kernel.org,
        linux-mips@...r.kernel.org, linux-parisc@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, sparclinux@...r.kernel.org,
        linux-xtensa@...ux-xtensa.org, dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH V2 05/11] {x86,powerpc,microblaze}/kmap: Move preempt
 disable

On Tue, May 05, 2020 at 11:11:13PM -0700, Christoph Hellwig wrote:
> On Sun, May 03, 2020 at 06:09:06PM -0700, ira.weiny@...el.com wrote:
> > From: Ira Weiny <ira.weiny@...el.com>
> > 
> > During this kmap() conversion series we must maintain bisect-ability.
> > To do this, kmap_atomic_prot() in x86, powerpc, and microblaze need to
> > remain functional.
> > 
> > Create a temporary inline version of kmap_atomic_prot within these
> > architectures so we can rework their kmap_atomic() calls and then lift
> > kmap_atomic_prot() to the core.
> > 
> > Signed-off-by: Ira Weiny <ira.weiny@...el.com>
> > 
> > ---
> > Changes from V1:
> > 	New patch
> > ---
> >  arch/microblaze/include/asm/highmem.h | 11 ++++++++++-
> >  arch/microblaze/mm/highmem.c          | 10 ++--------
> >  arch/powerpc/include/asm/highmem.h    | 11 ++++++++++-
> >  arch/powerpc/mm/highmem.c             |  9 ++-------
> >  arch/x86/include/asm/highmem.h        | 11 ++++++++++-
> >  arch/x86/mm/highmem_32.c              | 10 ++--------
> >  6 files changed, 36 insertions(+), 26 deletions(-)
> > 
> > diff --git a/arch/microblaze/include/asm/highmem.h b/arch/microblaze/include/asm/highmem.h
> > index 0c94046f2d58..ec9954b091e1 100644
> > --- a/arch/microblaze/include/asm/highmem.h
> > +++ b/arch/microblaze/include/asm/highmem.h
> > @@ -51,7 +51,16 @@ extern pte_t *pkmap_page_table;
> >  #define PKMAP_NR(virt)  ((virt - PKMAP_BASE) >> PAGE_SHIFT)
> >  #define PKMAP_ADDR(nr)  (PKMAP_BASE + ((nr) << PAGE_SHIFT))
> >  
> > -extern void *kmap_atomic_prot(struct page *page, pgprot_t prot);
> > +extern void *kmap_atomic_high_prot(struct page *page, pgprot_t prot);
> > +void *kmap_atomic_prot(struct page *page, pgprot_t prot)
> 
> Shouldn't this be marked inline?

Yes Thanks.  Done.

> 
> The rest looks fine:
> 
> Reviewed-by: Christoph Hellwig <hch@....de>

Thanks,
Ira