From: Julian Braha <julianbraha@gmail.com>
To: Frank Li <Frank.li@oss.nxp.com>
Cc: maddy@linux.ibm.com, mpe@ellerman.id.au, npiggin@gmail.com,
chleroy@kernel.org, Frank.Li@kernel.org, andrew+netdev@lunn.ch,
davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
pabeni@redhat.com, kernel-janitors@vger.kernel.org,
linusw@kernel.org, kees@kernel.org, colin.i.king@gmail.com,
rosenp@gmail.com, joao@joaoff.com, linuxppc-dev@lists.ozlabs.org,
linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org
Subject: Re: [PATCH v2] powerpc: remove dead 440SP code
Date: Tue, 1 Sep 2026 16:33:07 +0100 [thread overview]
Message-ID: <ad0b9721-9528-4c59-b75e-bb52ae24211e@gmail.com> (raw)
In-Reply-To: <apbvL6_WqojjOeRA@SMW015318>
On 9/1/26 16:28, Frank Li wrote:
> On Tue, Sep 01, 2026 at 04:06:45PM +0100, Julian Braha wrote:
>> The 440SP config option can never be enabled, making all references to it
>> dead code.
>>
>> The only board using CONFIG_440SP was IBM LUAN, which was commented out by
>> commit f65573314e4e ("[POWERPC] Re-organize Kconfig code for 4xx in
>> arch/powerpc") then removed by commit ff5f483f3091 ("powerpc: 4xx: remove
>> commented out Kconfig entries").
>>
>> Let's remove support for 440SP, since nobody can be using it anyway.
>>
>> This dead code was found by kconfirm, a static analysis tool for Kconfig.
>>
>> Signed-off-by: Julian Braha <julianbraha@gmail.com>
>> ---
>> Changes since v1:
>> - cleaned up preprocessor condition
>> - added historic details to description
>>
>> Link to v1:
>> https://lore.kernel.org/all/20260816125615.985387-1-julianbraha@gmail.com/
>> ---
>> arch/powerpc/boot/cuboot-katmai.c | 2 +-
>> arch/powerpc/include/asm/async_tx.h | 2 +-
>> arch/powerpc/include/asm/dcr-regs.h | 10 +++++-----
>> arch/powerpc/kernel/cpu_specs_44x.h | 12 ------------
>> arch/powerpc/platforms/44x/Kconfig | 3 ---
>> drivers/dma/Kconfig | 2 +-
>> drivers/dma/ppc4xx/adma.c | 9 ---------
>> drivers/dma/ppc4xx/adma.h | 2 +-
>> drivers/dma/ppc4xx/dma.h | 9 ---------
>
> Please split for difference subsystem.
Will do in v4, thanks! (v3 was already sent because of a dumb mistake in
amending the commit.)
- Julian Braha
prev parent reply other threads:[~2026-09-01 15:33 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-01 15:06 [PATCH v2] powerpc: remove dead 440SP code Julian Braha
2026-09-01 15:28 ` Frank Li
2026-09-01 15:33 ` Julian Braha [this message]
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