linux-kernel - Re: [PATCH] ACPI: PRM: Fix missing guid

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Message-ID: <Z3-2TWSdt2vFzUll@rric.localdomain>
Date: Thu, 9 Jan 2025 12:43:09 +0100
From: Robert Richter <rrichter@....com>
To: Yazen Ghannam <yazen.ghannam@....com>
Cc: "Rafael J. Wysocki" <rafael@...nel.org>, Len Brown <lenb@...nel.org>,
	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	John Allen <john.allen@....com>, Borislav Petkov <bp@...en8.de>
Subject: Re: [PATCH] ACPI: PRM: Fix missing guid_t declaration in linux/prmt.h

Yazen,

On 08.01.25 10:10:37, Yazen Ghannam wrote:
> On Tue, Jan 07, 2025 at 05:19:22PM +0100, Robert Richter wrote:
> > Seen the following build error:
> > 
> >  ./include/linux/prmt.h:5:27: error: unknown type name ‘guid_t’
> >      5 | int acpi_call_prm_handler(guid_t handler_guid, void *param_buffer);
> >        |                           ^~~~~~
> > 
> > The include file uses guid_t but it is not declared. Include
> > linux/uuid.h to fix this.
> > 
> > Cc: Yazen Ghannam <Yazen.Ghannam@....com>
> > Cc: John Allen <john.allen@....com>
> > Cc: Borislav Petkov (AMD) <bp@...en8.de>
> > Signed-off-by: Robert Richter <rrichter@....com>
> > ---
> >  include/linux/prmt.h | 2 ++
> >  1 file changed, 2 insertions(+)
> > 
> > diff --git a/include/linux/prmt.h b/include/linux/prmt.h
> > index 9c094294403f..c53ab287e932 100644
> > --- a/include/linux/prmt.h
> > +++ b/include/linux/prmt.h
> > @@ -1,5 +1,7 @@
> >  /* SPDX-License-Identifier: GPL-2.0-only */
> >  
> > +#include <linux/uuid.h>
> > +
> >  #ifdef CONFIG_ACPI_PRMT
> >  void init_prmt(void);
> >  int acpi_call_prm_handler(guid_t handler_guid, void *param_buffer);
> > -- 
> 
> Hi Robert,
> 
> This looks correct. But can you please share how you've encountered the
> issue?

sure, I have used it here:

 https://lore.kernel.org/all/20250107141015.3367194-26-rrichter@amd.com/

I just included linux/prmt.h to get the declaration of
acpi_call_prm_handler() without anything else. I assume other users of
linux/prmt.h indirectly include linux/uuid.h with some other include
file.

Thanks for review,

-Robert