From: Zong Li <zong.li@sifive.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org,
Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@sifive.com>,
Anup Patel <Anup.Patel@wdc.com>
Subject: Re: [PATCH v2] riscv: Use PMD_SIZE to repalce PTE_PARENT_SIZE
Date: Fri, 8 Nov 2019 16:50:44 +0800 [thread overview]
Message-ID: <CANXhq0qr-hsaJUaQ_nToyMv2sJHDUnHrernqYFV1Q90Uek6XxQ@mail.gmail.com> (raw)
In-Reply-To: <20191108072523.GA20338@infradead.org>
On Fri, Nov 8, 2019 at 3:25 PM Christoph Hellwig <hch@infradead.org> wrote:
>
> On Mon, Nov 04, 2019 at 06:20:12PM -0800, Zong Li wrote:
> > uintptr_t map_size = PAGE_SIZE;
> >
> > - /* Upgrade to PMD/PGDIR mappings whenever possible */
> > - if (!(base & (PTE_PARENT_SIZE - 1)) &&
> > - !(size & (PTE_PARENT_SIZE - 1)))
> > - map_size = PTE_PARENT_SIZE;
> > + /* Upgrade to PMD_SIZE mappings whenever possible */
> > + if (!(base & (PMD_SIZE - 1)) &&
> > + !(size & (PMD_SIZE - 1)))
> > + map_size = PMD_SIZE;
>
> The check easily fits onto a single line now. Also the map_size
> variable is rather pointless. Why not:
>
> if ((base & (PMD_SIZE - 1) || (size & (PMD_SIZE - 1)))
> return PAGE_SIZE;
> return PMD_SIZE;
Yes, Use positive representation is more clear to me. Change it in next version.
WARNING: multiple messages have this Message-ID (diff)
From: Zong Li <zong.li@sifive.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: Anup Patel <Anup.Patel@wdc.com>,
linux-riscv@lists.infradead.org,
Palmer Dabbelt <palmer@sifive.com>,
linux-kernel@vger.kernel.org,
Paul Walmsley <paul.walmsley@sifive.com>
Subject: Re: [PATCH v2] riscv: Use PMD_SIZE to repalce PTE_PARENT_SIZE
Date: Fri, 8 Nov 2019 16:50:44 +0800 [thread overview]
Message-ID: <CANXhq0qr-hsaJUaQ_nToyMv2sJHDUnHrernqYFV1Q90Uek6XxQ@mail.gmail.com> (raw)
In-Reply-To: <20191108072523.GA20338@infradead.org>
On Fri, Nov 8, 2019 at 3:25 PM Christoph Hellwig <hch@infradead.org> wrote:
>
> On Mon, Nov 04, 2019 at 06:20:12PM -0800, Zong Li wrote:
> > uintptr_t map_size = PAGE_SIZE;
> >
> > - /* Upgrade to PMD/PGDIR mappings whenever possible */
> > - if (!(base & (PTE_PARENT_SIZE - 1)) &&
> > - !(size & (PTE_PARENT_SIZE - 1)))
> > - map_size = PTE_PARENT_SIZE;
> > + /* Upgrade to PMD_SIZE mappings whenever possible */
> > + if (!(base & (PMD_SIZE - 1)) &&
> > + !(size & (PMD_SIZE - 1)))
> > + map_size = PMD_SIZE;
>
> The check easily fits onto a single line now. Also the map_size
> variable is rather pointless. Why not:
>
> if ((base & (PMD_SIZE - 1) || (size & (PMD_SIZE - 1)))
> return PAGE_SIZE;
> return PMD_SIZE;
Yes, Use positive representation is more clear to me. Change it in next version.
_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv
next prev parent reply other threads:[~2019-11-08 8:50 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-05 2:20 [PATCH v2] riscv: Use PMD_SIZE to repalce PTE_PARENT_SIZE Zong Li
2019-11-05 2:20 ` Zong Li
2019-11-05 3:21 ` Anup Patel
2019-11-05 3:21 ` Anup Patel
2019-11-06 19:00 ` Paul Walmsley
2019-11-06 19:00 ` Paul Walmsley
2019-11-08 7:25 ` Christoph Hellwig
2019-11-08 7:25 ` Christoph Hellwig
2019-11-08 8:50 ` Zong Li [this message]
2019-11-08 8:50 ` Zong Li
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CANXhq0qr-hsaJUaQ_nToyMv2sJHDUnHrernqYFV1Q90Uek6XxQ@mail.gmail.com \
--to=zong.li@sifive.com \
--cc=Anup.Patel@wdc.com \
--cc=hch@infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-riscv@lists.infradead.org \
--cc=palmer@sifive.com \
--cc=paul.walmsley@sifive.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.