linux-kernel - Re: [PATCH] coresight: make coresight

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Message-ID: <2024010544-framing-cinema-91a7@gregkh>
Date: Fri, 5 Jan 2024 15:40:50 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: Suzuki K Poulose <suzuki.poulose@....com>
Cc: coresight@...ts.linaro.org, linux-kernel@...r.kernel.org,
	Mike Leach <mike.leach@...aro.org>,
	James Clark <james.clark@....com>, Leo Yan <leo.yan@...aro.org>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] coresight: make coresight_bustype const

On Fri, Jan 05, 2024 at 02:22:43PM +0000, Suzuki K Poulose wrote:
> On 05/01/2024 12:33, Greg Kroah-Hartman wrote:
> > Now that the driver core can properly handle constant struct bus_type,
> > move the coresight_bustype variable to be a constant structure as well,
> > placing it into read-only memory which can not be modified at runtime.
> > 
> > Cc: Suzuki K Poulose <suzuki.poulose@....com>
> > Cc: Mike Leach <mike.leach@...aro.org>
> > Cc: James Clark <james.clark@....com>
> > Cc: Leo Yan <leo.yan@...aro.org>
> > Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
> > Cc: coresight@...ts.linaro.org
> > Cc: linux-arm-kernel@...ts.infradead.org
> > Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> > ---
> >   drivers/hwtracing/coresight/coresight-core.c | 2 +-
> >   include/linux/coresight.h                    | 2 +-
> >   2 files changed, 2 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtracing/coresight/coresight-core.c
> > index 9fabe00a40d6..24c49e581737 100644
> > --- a/drivers/hwtracing/coresight/coresight-core.c
> > +++ b/drivers/hwtracing/coresight/coresight-core.c
> > @@ -1796,7 +1796,7 @@ char *coresight_alloc_device_name(struct coresight_dev_list *dict,
> >   }
> >   EXPORT_SYMBOL_GPL(coresight_alloc_device_name);
> > -struct bus_type coresight_bustype = {
> > +const struct bus_type coresight_bustype = {
> >   	.name	= "coresight",
> >   };
> > diff --git a/include/linux/coresight.h b/include/linux/coresight.h
> > index a269fffaf991..8fe75a0d7693 100644
> > --- a/include/linux/coresight.h
> > +++ b/include/linux/coresight.h
> > @@ -35,7 +35,7 @@
> >   #define CORESIGHT_UNLOCK	0xc5acce55
> > -extern struct bus_type coresight_bustype;
> > +extern const struct bus_type coresight_bustype;
> 
> Thanks, for the patch. I will queue this for v6.8.

Thanks!