[PATCH v2 1/1] iommu/vt-d: Move intel_iommu_ops to header file

[PATCH v2 1/1] iommu/vt-d: Move intel_iommu_ops to header file

[Andy Shevchenko]

Compiler is not happy about hidden declaration of intel_iommu_ops.

.../iommu.c:414:24: warning: symbol 'intel_iommu_ops' was not declared. Should it be static?

Move declaration to header file to make compiler happy.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
v2: made sure it compiles with IRQ_REMAP=y, INTEL_IOMMU=n (Lu)
 drivers/iommu/intel/dmar.c  | 2 --
 include/linux/intel-iommu.h | 2 ++
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/intel/dmar.c b/drivers/iommu/intel/dmar.c
index 915bff76fe96..b114e09a647d 100644
--- a/drivers/iommu/intel/dmar.c
+++ b/drivers/iommu/intel/dmar.c
@@ -66,8 +66,6 @@ static unsigned long dmar_seq_ids[BITS_TO_LONGS(DMAR_UNITS_SUPPORTED)];
 static int alloc_iommu(struct dmar_drhd_unit *drhd);
 static void free_iommu(struct intel_iommu *iommu);
 
-extern const struct iommu_ops intel_iommu_ops;
-
 static void dmar_register_drhd_unit(struct dmar_drhd_unit *drhd)
 {
 	/*
diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
index 69230fd695ea..1036c1900b5c 100644
--- a/include/linux/intel-iommu.h
+++ b/include/linux/intel-iommu.h
@@ -813,6 +813,8 @@ bool context_present(struct context_entry *context);
 struct context_entry *iommu_context_addr(struct intel_iommu *iommu, u8 bus,
 					 u8 devfn, int alloc);
 
+extern const struct iommu_ops intel_iommu_ops;
+
 #ifdef CONFIG_INTEL_IOMMU
 extern int iommu_calculate_agaw(struct intel_iommu *iommu);
 extern int iommu_calculate_max_sagaw(struct intel_iommu *iommu);
-- 
2.34.1

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[PATCH v2 1/1] iommu/vt-d: Move intel_iommu_ops to header file

[Andy Shevchenko]

Compiler is not happy about hidden declaration of intel_iommu_ops.

.../iommu.c:414:24: warning: symbol 'intel_iommu_ops' was not declared. Should it be static?

Move declaration to header file to make compiler happy.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
v2: made sure it compiles with IRQ_REMAP=y, INTEL_IOMMU=n (Lu)
 drivers/iommu/intel/dmar.c  | 2 --
 include/linux/intel-iommu.h | 2 ++
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/intel/dmar.c b/drivers/iommu/intel/dmar.c
index 915bff76fe96..b114e09a647d 100644
--- a/drivers/iommu/intel/dmar.c
+++ b/drivers/iommu/intel/dmar.c
@@ -66,8 +66,6 @@ static unsigned long dmar_seq_ids[BITS_TO_LONGS(DMAR_UNITS_SUPPORTED)];
 static int alloc_iommu(struct dmar_drhd_unit *drhd);
 static void free_iommu(struct intel_iommu *iommu);
 
-extern const struct iommu_ops intel_iommu_ops;
-
 static void dmar_register_drhd_unit(struct dmar_drhd_unit *drhd)
 {
 	/*
diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
index 69230fd695ea..1036c1900b5c 100644
--- a/include/linux/intel-iommu.h
+++ b/include/linux/intel-iommu.h
@@ -813,6 +813,8 @@ bool context_present(struct context_entry *context);
 struct context_entry *iommu_context_addr(struct intel_iommu *iommu, u8 bus,
 					 u8 devfn, int alloc);
 
+extern const struct iommu_ops intel_iommu_ops;
+
 #ifdef CONFIG_INTEL_IOMMU
 extern int iommu_calculate_agaw(struct intel_iommu *iommu);
 extern int iommu_calculate_max_sagaw(struct intel_iommu *iommu);
-- 
2.34.1

Re: [PATCH v2 1/1] iommu/vt-d: Move intel_iommu_ops to header file

[Andy Shevchenko]

On Mon, Feb 07, 2022 at 04:12:40PM +0200, Andy Shevchenko wrote:
> Compiler is not happy about hidden declaration of intel_iommu_ops.
> 
> .../iommu.c:414:24: warning: symbol 'intel_iommu_ops' was not declared. Should it be static?
> 
> Move declaration to header file to make compiler happy.

Note, with this change we are closer to have a clean build with the
CONFIG_WERROR=y when `make W=1`.

-- 
With Best Regards,
Andy Shevchenko


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Re: [PATCH v2 1/1] iommu/vt-d: Move intel_iommu_ops to header file

[Andy Shevchenko]

On Mon, Feb 07, 2022 at 04:12:40PM +0200, Andy Shevchenko wrote:
> Compiler is not happy about hidden declaration of intel_iommu_ops.
> 
> .../iommu.c:414:24: warning: symbol 'intel_iommu_ops' was not declared. Should it be static?
> 
> Move declaration to header file to make compiler happy.

Note, with this change we are closer to have a clean build with the
CONFIG_WERROR=y when `make W=1`.

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH v2 1/1] iommu/vt-d: Move intel_iommu_ops to header file

[Joerg Roedel]

On Mon, Feb 07, 2022 at 04:12:40PM +0200, Andy Shevchenko wrote:
> diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
> index 69230fd695ea..1036c1900b5c 100644
> --- a/include/linux/intel-iommu.h
> +++ b/include/linux/intel-iommu.h
> @@ -813,6 +813,8 @@ bool context_present(struct context_entry *context);
>  struct context_entry *iommu_context_addr(struct intel_iommu *iommu, u8 bus,
>  					 u8 devfn, int alloc);
>  
> +extern const struct iommu_ops intel_iommu_ops;
> +

The intel_iommu_ops symbol is only used in drivers/iommu/intel, so I
would prefer a header in that directory. But I leave that up to Baolu to
decide.

Thanks,

	Joerg

Re: [PATCH v2 1/1] iommu/vt-d: Move intel_iommu_ops to header file

[Joerg Roedel]

On Mon, Feb 07, 2022 at 04:12:40PM +0200, Andy Shevchenko wrote:
> diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
> index 69230fd695ea..1036c1900b5c 100644
> --- a/include/linux/intel-iommu.h
> +++ b/include/linux/intel-iommu.h
> @@ -813,6 +813,8 @@ bool context_present(struct context_entry *context);
>  struct context_entry *iommu_context_addr(struct intel_iommu *iommu, u8 bus,
>  					 u8 devfn, int alloc);
>  
> +extern const struct iommu_ops intel_iommu_ops;
> +

The intel_iommu_ops symbol is only used in drivers/iommu/intel, so I
would prefer a header in that directory. But I leave that up to Baolu to
decide.

Thanks,

	Joerg
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Re: [PATCH v2 1/1] iommu/vt-d: Move intel_iommu_ops to header file

[Lu Baolu]

On 2/14/22 9:27 PM, Joerg Roedel wrote:
> On Mon, Feb 07, 2022 at 04:12:40PM +0200, Andy Shevchenko wrote:
>> diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
>> index 69230fd695ea..1036c1900b5c 100644
>> --- a/include/linux/intel-iommu.h
>> +++ b/include/linux/intel-iommu.h
>> @@ -813,6 +813,8 @@ bool context_present(struct context_entry *context);
>>   struct context_entry *iommu_context_addr(struct intel_iommu *iommu, u8 bus,
>>   					 u8 devfn, int alloc);
>>   
>> +extern const struct iommu_ops intel_iommu_ops;
>> +
> The intel_iommu_ops symbol is only used in drivers/iommu/intel, so I
> would prefer a header in that directory. But I leave that up to Baolu to
> decide.

Agreed. I also have a plan to split them out into a internal header.

Best regards,
baolu

Re: [PATCH v2 1/1] iommu/vt-d: Move intel_iommu_ops to header file

[Lu Baolu]

On 2/14/22 9:27 PM, Joerg Roedel wrote:
> On Mon, Feb 07, 2022 at 04:12:40PM +0200, Andy Shevchenko wrote:
>> diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
>> index 69230fd695ea..1036c1900b5c 100644
>> --- a/include/linux/intel-iommu.h
>> +++ b/include/linux/intel-iommu.h
>> @@ -813,6 +813,8 @@ bool context_present(struct context_entry *context);
>>   struct context_entry *iommu_context_addr(struct intel_iommu *iommu, u8 bus,
>>   					 u8 devfn, int alloc);
>>   
>> +extern const struct iommu_ops intel_iommu_ops;
>> +
> The intel_iommu_ops symbol is only used in drivers/iommu/intel, so I
> would prefer a header in that directory. But I leave that up to Baolu to
> decide.

Agreed. I also have a plan to split them out into a internal header.

Best regards,
baolu
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Re: [PATCH v2 1/1] iommu/vt-d: Move intel_iommu_ops to header file

[Andy Shevchenko]

On Tue, Feb 15, 2022 at 09:31:37AM +0800, Lu Baolu wrote:
> On 2/14/22 9:27 PM, Joerg Roedel wrote:
> > On Mon, Feb 07, 2022 at 04:12:40PM +0200, Andy Shevchenko wrote:

...

> > > +extern const struct iommu_ops intel_iommu_ops;

> > The intel_iommu_ops symbol is only used in drivers/iommu/intel, so I
> > would prefer a header in that directory. But I leave that up to Baolu to
> > decide.
> 
> Agreed. I also have a plan to split them out into a internal header.

The above change is hanging for more than a year, can we apply it and then
you can do a split?

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH v2 1/1] iommu/vt-d: Move intel_iommu_ops to header file

[Andy Shevchenko]

On Tue, Feb 15, 2022 at 09:31:37AM +0800, Lu Baolu wrote:
> On 2/14/22 9:27 PM, Joerg Roedel wrote:
> > On Mon, Feb 07, 2022 at 04:12:40PM +0200, Andy Shevchenko wrote:

...

> > > +extern const struct iommu_ops intel_iommu_ops;

> > The intel_iommu_ops symbol is only used in drivers/iommu/intel, so I
> > would prefer a header in that directory. But I leave that up to Baolu to
> > decide.
> 
> Agreed. I also have a plan to split them out into a internal header.

The above change is hanging for more than a year, can we apply it and then
you can do a split?

-- 
With Best Regards,
Andy Shevchenko


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Re: [PATCH v2 1/1] iommu/vt-d: Move intel_iommu_ops to header file

[Lu Baolu]

On 2/15/22 5:51 PM, Andy Shevchenko wrote:
> On Tue, Feb 15, 2022 at 09:31:37AM +0800, Lu Baolu wrote:
>> On 2/14/22 9:27 PM, Joerg Roedel wrote:
>>> On Mon, Feb 07, 2022 at 04:12:40PM +0200, Andy Shevchenko wrote:
> 
> ...
> 
>>>> +extern const struct iommu_ops intel_iommu_ops;
> 
>>> The intel_iommu_ops symbol is only used in drivers/iommu/intel, so I
>>> would prefer a header in that directory. But I leave that up to Baolu to
>>> decide.
>>
>> Agreed. I also have a plan to split them out into a internal header.
> 
> The above change is hanging for more than a year, can we apply it and then
> you can do a split?
> 

Yeah. This is my plan. The include/linux/intel-iommu.h also keeps other
internal only helpers. It worth a separated cleanup patch.

Best regards,
baolu
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Re: [PATCH v2 1/1] iommu/vt-d: Move intel_iommu_ops to header file

[Lu Baolu]

On 2/15/22 5:51 PM, Andy Shevchenko wrote:
> On Tue, Feb 15, 2022 at 09:31:37AM +0800, Lu Baolu wrote:
>> On 2/14/22 9:27 PM, Joerg Roedel wrote:
>>> On Mon, Feb 07, 2022 at 04:12:40PM +0200, Andy Shevchenko wrote:
> 
> ...
> 
>>>> +extern const struct iommu_ops intel_iommu_ops;
> 
>>> The intel_iommu_ops symbol is only used in drivers/iommu/intel, so I
>>> would prefer a header in that directory. But I leave that up to Baolu to
>>> decide.
>>
>> Agreed. I also have a plan to split them out into a internal header.
> 
> The above change is hanging for more than a year, can we apply it and then
> you can do a split?
> 

Yeah. This is my plan. The include/linux/intel-iommu.h also keeps other
internal only helpers. It worth a separated cleanup patch.

Best regards,
baolu