linux-kernel - Re: [PATCH 0/3] Cleanup MAY_HAVE_SPARSE

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Date:   Tue, 28 Sep 2021 13:43:16 +0800
From:   Kefeng Wang <wangkefeng.wang@...wei.com>
To:     Guo Ren <guoren@...nel.org>
CC:     Thomas Gleixner <tglx@...utronix.de>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>, <linux-sh@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        <linux-csky@...r.kernel.org>
Subject: Re: [PATCH 0/3] Cleanup MAY_HAVE_SPARSE_IRQ


On 2021/9/28 13:08, Guo Ren wrote:
> On Mon, Sep 27, 2021 at 4:11 PM Kefeng Wang <wangkefeng.wang@...wei.com> wrote:
>> Most ARCHs support SPARSE_IRQ, and MAY_HAVE_SPARSE_IRQ is useless, and
>> only sh and csky select it, but the could use SPARSE_IRQ too, let's
>> kill MAY_HAVE_SPARSE_IRQ, also cleanup the kernel/irq/Kconfig a little.
> Can you elaborate the reason on why we need to kill MAY_HAVE_SPARSE_IRQ?
> What are the benefits after the patch? (As you know we couldn't drop
> "!SPARSE_IRQ".)

If csky want to keep MAY_HAVE_SPARSE_IRQ, then I won't kill it, or no 
one use it,

then cleanup it.