linux-kernel - Re: [PATCH 0/3] COVER: Remove memcpy_page

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Date:   Wed, 15 Mar 2023 18:12:49 -0700
From:   Ira Weiny <ira.weiny@...el.com>
To:     Dave Hansen <dave.hansen@...el.com>,
        Ira Weiny <ira.weiny@...el.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Michael Ellerman <mpe@...erman.id.au>,
        Nicholas Piggin <npiggin@...il.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        "Catalin Marinas" <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Ingo Molnar <mingo@...hat.com>,
        Borislav Petkov <bp@...en8.de>, <x86@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>
CC:     Dan Williams <dan.j.williams@...el.com>,
        Al Viro <viro@...iv.linux.org.uk>,
        <linux-kernel@...r.kernel.org>, <linuxppc-dev@...ts.ozlabs.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 0/3] COVER: Remove memcpy_page_flushcache()

Dave Hansen wrote:
> On 3/15/23 16:20, Ira Weiny wrote:
> > Commit 21b56c847753 ("iov_iter: get rid of separate bvec and xarray 
> > callbacks") removed the calls to memcpy_page_flushcache().
> > 
> > kmap_atomic() is deprecated and used in the x86 version of
> > memcpy_page_flushcache().
> > 
> > Remove the unnecessary memcpy_page_flushcache() call from all arch's.
> 
> Hi Ira,
> 
> Since the common code user is already gone these three patches seem
> quite independent.  It seems like the right thing to do is have
> individual arch maintainers cherry pick their arch patch and carry it
> independently.

Yes.

> 
> Is there a compelling reason to have someone pick up and carry these all
> together that I'm missing?

No reason.  Would you like me to submit them individually?

Sorry, submitting them separately crossed my mind when I wrote them but I
kind of forgot as they were all on the same branch and I was waiting for
after the merge window to submit them.

Ira