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

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Message-ID: <083297b0-58e2-aa1e-2f8a-47845a9b373e@huawei.com>
Date:   Mon, 27 Sep 2021 20:35:48 +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 2021/9/27 20:09, Guo Ren wrote:
> I didn't see the patch delete:
> #else /* !CONFIG_SPARSE_IRQ */
> struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = {
>          [0 ... NR_IRQS-1] = {
>                  .handle_irq     = handle_bad_irq,
>                  .depth          = 1,
>                  .lock           = __RAW_SPIN_LOCK_UNLOCKED(irq_desc->lock),
>          }
> };
> ...
>
> Flat irq_desc[] is simple and easy for debugging. We do want to del it?

This patches want to kill MAY_HAVE_SPARSE_IRQ,  not !SPARSE_IRQ.

so I won't delete above parts(eg, ARM could use both SPARSE_IRQ and

!SPARSE_IRQ via different config,)

>
> 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.
>>
>> Kefeng Wang (3):
>>    sh: Cleanup about SPARSE_IRQ
>>    csky: Use SPARSE_IRQ
>>    genirq: Cleanup Kconfig
>>
>>   arch/csky/Kconfig         |  2 +-
>>   arch/sh/Kconfig           |  1 -
>>   arch/sh/include/asm/irq.h |  9 -------
>>   kernel/irq/Kconfig        | 50 ++++++++++++++++-----------------------
>>   4 files changed, 21 insertions(+), 41 deletions(-)
>>
>> --
>> 2.26.2
>>
>