[PATCH] iommu/vt-d: Fix W=1 clang warning in intel/perf.c

[Joerg Roedel]

From: Joerg Roedel <jro...@suse.de>

Fix this warning when compiled with clang and W=1:

drivers/iommu/intel/perf.c:16: warning: Function parameter or member 'latency_lock' not described in 'DEFINE_SPINLOCK'
drivers/iommu/intel/perf.c:16: warning: expecting prototype for perf.c(). Prototype was for DEFINE_SPINLOCK() instead

Cc: Lu Baolu <baol...@linux.intel.com>
Reported-by: kernel test robot <l...@intel.com>
Fixes: 55ee5e67a59a ("iommu/vt-d: Add common code for dmar latency performance monitors")
Signed-off-by: Joerg Roedel <jro...@suse.de>
---
drivers/iommu/intel/perf.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/intel/perf.c b/drivers/iommu/intel/perf.c
index 73b7ec705552..0e8e03252d92 100644
--- a/drivers/iommu/intel/perf.c
+++ b/drivers/iommu/intel/perf.c
@@ -1,5 +1,5 @@
// SPDX-License-Identifier: GPL-2.0
-/**
+/*
* perf.c - performance monitor
*
* Copyright (C) 2021 Intel Corporation
--
2.31.1

[Nick Desaulniers]

On Thu, Jun 17, 2021 at 7:54 AM Joerg Roedel <jo...@8bytes.org> wrote:
>
> From: Joerg Roedel <jro...@suse.de>
>
> Fix this warning when compiled with clang and W=1:
>
> drivers/iommu/intel/perf.c:16: warning: Function parameter or member 'latency_lock' not described in 'DEFINE_SPINLOCK'
> drivers/iommu/intel/perf.c:16: warning: expecting prototype for perf.c(). Prototype was for DEFINE_SPINLOCK() instead

I think these warnings are actually produced by kernel-doc? (not clang)

>
> Cc: Lu Baolu <baol...@linux.intel.com>
> Reported-by: kernel test robot <l...@intel.com>
> Fixes: 55ee5e67a59a ("iommu/vt-d: Add common code for dmar latency performance monitors")
> Signed-off-by: Joerg Roedel <jro...@suse.de>
> ---
> drivers/iommu/intel/perf.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/iommu/intel/perf.c b/drivers/iommu/intel/perf.c
> index 73b7ec705552..0e8e03252d92 100644
> --- a/drivers/iommu/intel/perf.c
> +++ b/drivers/iommu/intel/perf.c
> @@ -1,5 +1,5 @@
> // SPDX-License-Identifier: GPL-2.0
> -/**
> +/*
> * perf.c - performance monitor
> *
> * Copyright (C) 2021 Intel Corporation
> --
> 2.31.1
>

> --
> You received this message because you are subscribed to the Google Groups "Clang Built Linux" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to clang-built-li...@googlegroups.com.
> To view this discussion on the web visit https://groups.google.com/d/msgid/clang-built-linux/20210617145339.2692-1-joro%408bytes.org.



--
Thanks,
~Nick Desaulniers

[Joerg Roedel]

On Thu, Jun 17, 2021 at 10:16:50AM -0700, Nick Desaulniers wrote:
> On Thu, Jun 17, 2021 at 7:54 AM Joerg Roedel <jo...@8bytes.org> wrote:
> >
> > From: Joerg Roedel <jro...@suse.de>
> >
> > Fix this warning when compiled with clang and W=1:
> >
> > drivers/iommu/intel/perf.c:16: warning: Function parameter or member 'latency_lock' not described in 'DEFINE_SPINLOCK'
> > drivers/iommu/intel/perf.c:16: warning: expecting prototype for perf.c(). Prototype was for DEFINE_SPINLOCK() instead
>
> I think these warnings are actually produced by kernel-doc? (not clang)

Will kernel-doc check automatically when COMPILER=clang is set and W=1?
Because I did not explicitly enable any kernel-doc checks.

Regards,

Joerg

[Nathan Chancellor]

kernel-doc is run automatically with W=1, regardless of gcc versus clang.

Cheers,
Nathan

[Joerg Roedel]

On Thu, Jun 17, 2021 at 01:51:24PM -0700, Nathan Chancellor wrote:
> kernel-doc is run automatically with W=1, regardless of gcc versus clang.

I see, thanks. Will update the commit message.

Thanks,

Joerg