linux-kernel - Re: [PATCH v3] fwctl/cxl: Fix uuid

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Message-ID: <20250411234806.GD252886@nvidia.com>
Date: Fri, 11 Apr 2025 20:48:06 -0300
From: Jason Gunthorpe <jgg@...dia.com>
To: Dan Williams <dan.j.williams@...el.com>
Cc: "Paul E. McKenney" <paulmck@...nel.org>,
	kernel test robot <lkp@...el.com>, linux-kernel@...r.kernel.org,
	dave.jiang@...el.com, linux-cxl@...r.kernel.org
Subject: Re: [PATCH v3] fwctl/cxl: Fix uuid_t usage in uapi

On Thu, Apr 10, 2025 at 11:27:40AM -0700, Dan Williams wrote:
> The uuid_t type is kernel internal, and Paul reports the following build
> error when it is used in a uapi header:
> 
>     usr/include/cxl/features.h:59:9: error: unknown type name ‘uuid_t’
> 
> Create a uuid type (__uapi_uuid_t) compatible with the longstanding
> definition uuid/uuid.h for userspace builds, and use uuid_t directly for
> kernel builds.
> 
> Suggested-by: Jason Gunthorpe <jgg@...dia.com>
> Reported-by: "Paul E. McKenney" <paulmck@...nel.org>
> Closes: http://lore.kernel.org/f6489337-67c7-48c8-b48a-58603ec15328@paulmck-laptop
> Reported-by: kernel test robot <lkp@...el.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202504050434.Eb4vugh5-lkp@intel.com/
> Fixes: 9b8e73cdb141 ("cxl: Move cxl feature command structs to user header")
> Signed-off-by: Dan Williams <dan.j.williams@...el.com>
> ---
> Changes since v2:
> * Drop the tinkering with __align_of__ and just document the safety
>   rules (Jason)
> 
>  include/uapi/cxl/features.h |   21 +++++++++++++++------
>  1 file changed, 15 insertions(+), 6 deletions(-)

Applied thanks

Jason