linux-kernel - Re: [PATCH] drivers: mhi: make mhi_ep_bus

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Message-ID: <zqhspeq37j6j2ss6qreoq4kj23mzo2zd5ttkpykayuvo6jigip@dthsh4ngicqv>
Date: Wed, 15 Oct 2025 16:54:30 +0530
From: Manivannan Sadhasivam <mani@...nel.org>
To: Adrian Barnaś <abarnas@...gle.com>
Cc: mhi@...ts.linux.dev, linux-arm-msm@...r.kernel.org, 
	linux-kernel@...r.kernel.org, Akhil Vinod <akhil.vinod@....qualcomm.com>, 
	Sumit Kumar <sumit.kumar@....qualcomm.com>, Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>, 
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH] drivers: mhi: make mhi_ep_bus_type const

On Fri, Sep 19, 2025 at 07:44:08AM +0000, Adrian Barnaś wrote:
> Because driver core can properly handle constant struct bus_type,
> move the mhi_ep_bus_type to be a constant structure as well, placing it
> into read-only memory which can not be modified at runtime.
> 
> Signed-off-by: Adrian Barnaś <abarnas@...gle.com>

Applied to mhi-next!

- Mani

> ---
>  drivers/bus/mhi/ep/internal.h | 2 +-
>  drivers/bus/mhi/ep/main.c     | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/bus/mhi/ep/internal.h b/drivers/bus/mhi/ep/internal.h
> index 577965f95fda..512da7482acc 100644
> --- a/drivers/bus/mhi/ep/internal.h
> +++ b/drivers/bus/mhi/ep/internal.h
> @@ -11,7 +11,7 @@
>  
>  #include "../common.h"
>  
> -extern struct bus_type mhi_ep_bus_type;
> +extern const struct bus_type mhi_ep_bus_type;
>  
>  #define MHI_REG_OFFSET				0x100
>  #define BHI_REG_OFFSET				0x200
> diff --git a/drivers/bus/mhi/ep/main.c b/drivers/bus/mhi/ep/main.c
> index cdea24e92919..86e003bc44e0 100644
> --- a/drivers/bus/mhi/ep/main.c
> +++ b/drivers/bus/mhi/ep/main.c
> @@ -1703,7 +1703,7 @@ static int mhi_ep_match(struct device *dev, const struct device_driver *drv)
>  	return 0;
>  };
>  
> -struct bus_type mhi_ep_bus_type = {
> +const struct bus_type mhi_ep_bus_type = {
>  	.name = "mhi_ep",
>  	.dev_name = "mhi_ep",
>  	.match = mhi_ep_match,
> -- 
> 2.51.0.534.gc79095c0ca-goog
> 

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