linux-kernel - Re: [PATCH] MIPS: Fix HOTPLUG

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Message-ID: <87v7jirnj0.fsf@BLaptop.bootlin.com>
Date: Mon, 10 Nov 2025 15:05:23 +0100
From: Gregory CLEMENT <gregory.clement@...tlin.com>
To: Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc: Benoît Monin <benoit.monin@...tlin.com>, Théo Lebrun
 <theo.lebrun@...tlin.com>, Vladimir Kondratiev
 <vladimir.kondratiev@...ileye.com>, Thomas Petazzoni
 <thomas.petazzoni@...tlin.com>, linux-mips@...r.kernel.org,
 linux-kernel@...r.kernel.org, kernel test robot <lkp@...el.com>
Subject: Re: [PATCH] MIPS: Fix HOTPLUG_PARALLEL dependency

Hello Thomas,

> With MIPS, it is possible to have SMP enabled without HOTPLUG_CPU
> selected. However, in kernel/cpu.c, some code that uses
> HOTPLUG_PARALLEL also requires HOTPLUG_CPU to be selected. Therefore,
> we should fix the HOTPLUG_PARALLEL dependency to depend on
> HOTPLUG_CPU, not just SMP.
>
> Reported-by: kernel test robot <lkp@...el.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202510270120.21wA1aX1-lkp@intel.com/
> Signed-off-by: Gregory CLEMENT <gregory.clement@...tlin.com>

Do you have any comments about this fix?

Regards,

Gregory

> ---
>  arch/mips/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
> index e8683f58fd3e2..b88b97139fa8e 100644
> --- a/arch/mips/Kconfig
> +++ b/arch/mips/Kconfig
> @@ -658,7 +658,7 @@ config EYEQ
>  	select USB_UHCI_BIG_ENDIAN_DESC if CPU_BIG_ENDIAN
>  	select USB_UHCI_BIG_ENDIAN_MMIO if CPU_BIG_ENDIAN
>  	select USE_OF
> -	select HOTPLUG_PARALLEL if SMP
> +	select HOTPLUG_PARALLEL if HOTPLUG_CPU
>  	help
>  	  Select this to build a kernel supporting EyeQ SoC from Mobileye.
>  
>
> ---
> base-commit: dcb6fa37fd7bc9c3d2b066329b0d27dedf8becaa
> change-id: 20251027-mips_paralell_hotplug-e9ae2b1fa126
>
> Best regards,
> -- 
> Grégory CLEMENT, Bootlin
> Embedded Linux and Kernel engineering
> https://bootlin.com
>

-- 
Grégory CLEMENT, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com