linux-kernel - Re: [PATCH] powerpc/iommu: Code cleanup for cell/iommu.c

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Message-ID: <7cdfcfc3-fc9e-433d-8992-7782d641cb94@csgroup.eu>
Date: Thu, 25 Jan 2024 06:49:11 +0000
From: Christophe Leroy <christophe.leroy@...roup.eu>
To: Kunwu Chan <chentao@...inos.cn>, "arnd@...db.de" <arnd@...db.de>,
	"mpe@...erman.id.au" <mpe@...erman.id.au>, "npiggin@...il.com"
	<npiggin@...il.com>, "aneesh.kumar@...nel.org" <aneesh.kumar@...nel.org>,
	"naveen.n.rao@...ux.ibm.com" <naveen.n.rao@...ux.ibm.com>
CC: "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] powerpc/iommu: Code cleanup for cell/iommu.c



Le 25/01/2024 à 03:46, Kunwu Chan a écrit :
> This part was commented from commit 165785e5c0be ("[POWERPC] Cell
> iommu support") in about 17 years before.
> 
> If there are no plans to enable this part code in the future,
> we can remove this dead code.
> 
> Signed-off-by: Kunwu Chan <chentao@...inos.cn>
> ---
>   arch/powerpc/platforms/cell/iommu.c | 16 ----------------
>   1 file changed, 16 deletions(-)
> 
> diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c
> index 1202a69b0a20..afce9e64a443 100644
> --- a/arch/powerpc/platforms/cell/iommu.c
> +++ b/arch/powerpc/platforms/cell/iommu.c
> @@ -424,22 +424,6 @@ static void __init cell_iommu_setup_hardware(struct cbe_iommu *iommu,
>   	cell_iommu_enable_hardware(iommu);
>   }
>   
> -#if 0/* Unused for now */
> -static struct iommu_window *find_window(struct cbe_iommu *iommu,
> -		unsigned long offset, unsigned long size)
> -{
> -	struct iommu_window *window;
> -
> -	/* todo: check for overlapping (but not equal) windows) */
> -
> -	list_for_each_entry(window, &(iommu->windows), list) {
> -		if (window->offset == offset && window->size == size)
> -			return window;
> -	}
> -
> -	return NULL;
> -}
> -#endif

Same as the other one, please remove the second blank line, don't leave 
two blank lines between the remaining functions.

>   
>   static inline u32 cell_iommu_get_ioid(struct device_node *np)
>   {