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[PATCH 2/2] soc: fsl: fix section mismatch build warnings

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  [PATCH 2/2] soc: fsl: fix section mismatch build warnings Sudeep Holla <sudeep.holla@arm.com> - 2016-11-16 17:40 +0100
    Re: [PATCH 2/2] soc: fsl: fix section mismatch build warnings Arnd Bergmann <arnd@arndb.de> - 2016-11-16 18:10 +0100
      Re: [PATCH 2/2] soc: fsl: fix section mismatch build warnings Sudeep Holla <sudeep.holla@arm.com> - 2016-11-16 18:20 +0100
    Re: [PATCH v2 -next] soc: fsl: fix section mismatch build warnings Arnd Bergmann <arnd@arndb.de> - 2016-11-17 18:20 +0100
      Re: [PATCH v2 -next] soc: fsl: fix section mismatch build warnings Ulf Hansson <ulf.hansson@linaro.org> - 2016-11-18 15:40 +0100
    [PATCH v2 -next] soc: fsl: fix section mismatch build warnings Sudeep Holla <sudeep.holla@arm.com> - 2016-11-17 18:40 +0100

#1523644 — [PATCH 2/2] soc: fsl: fix section mismatch build warnings

We get the following warning with the driver is compiled in:

WARNING: modpost: Found 1 section mismatch(es).
To see full details build your kernel with:
'make CONFIG_DEBUG_SECTION_MISMATCH=y'

With CONFIG_DEBUG_SECTION_MISMATCH enabled, the details are reported:

WARNING: vmlinux.o(.text+0x55d014): Section mismatch in reference from the
function fsl_guts_probe() to the function
.init.text:of_flat_dt_get_machine_name()
The function fsl_guts_probe() references
the function __init of_flat_dt_get_machine_name().
This is often because fsl_guts_probe lacks a __init
annotation or the annotation of of_flat_dt_get_machine_name is wrong.

This patch stashes the machine name during fsl_guts_init initcall to
fix the above warnings.

Cc: Scott Wood <oss@buserror.net>
Cc: Yangbo Lu <yangbo.lu@nxp.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
---
 drivers/soc/fsl/guts.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/soc/fsl/guts.c b/drivers/soc/fsl/guts.c
index 885409d84eb2..5513a2b3448f 100644
--- a/drivers/soc/fsl/guts.c
+++ b/drivers/soc/fsl/guts.c
@@ -31,6 +31,7 @@ struct fsl_soc_die_attr {
 static struct guts *guts;
 static struct soc_device_attribute soc_dev_attr;
 static struct soc_device *soc_dev;
+static const char *machine;
 
 
 /* SoC die attribute definition for QorIQ platform */
@@ -135,7 +136,6 @@ static int fsl_guts_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct resource *res;
 	const struct fsl_soc_die_attr *soc_die;
-	const char *machine;
 	u32 svr;
 
 	/* Initialize guts */
@@ -151,7 +151,6 @@ static int fsl_guts_probe(struct platform_device *pdev)
 		return PTR_ERR(guts->regs);
 
 	/* Register soc device */
-	machine = of_flat_dt_get_machine_name();
 	if (machine)
 		soc_dev_attr.machine = devm_kstrdup(dev, machine, GFP_KERNEL);
 
@@ -223,6 +222,7 @@ static struct platform_driver fsl_guts_driver = {
 
 static int __init fsl_guts_init(void)
 {
+	machine = of_flat_dt_get_machine_name();
 	return platform_driver_register(&fsl_guts_driver);
 }
 core_initcall(fsl_guts_init);
-- 
2.7.4

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#1523664

On Wednesday, November 16, 2016 4:39:27 PM CET Sudeep Holla wrote:
> @@ -223,6 +222,7 @@ static struct platform_driver fsl_guts_driver = {
>  
>  static int __init fsl_guts_init(void)
>  {
> +       machine = of_flat_dt_get_machine_name();
>         return platform_driver_register(&fsl_guts_driver);
>  }
>  core_initcall(fsl_guts_init);

I think we simply need to use the normal DT API rather than the of_flat_* one.

	Arnd

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#1523670

On 16/11/16 17:07, Arnd Bergmann wrote:
> On Wednesday, November 16, 2016 4:39:27 PM CET Sudeep Holla wrote:
>> @@ -223,6 +222,7 @@ static struct platform_driver fsl_guts_driver = {
>>
>>  static int __init fsl_guts_init(void)
>>  {
>> +       machine = of_flat_dt_get_machine_name();
>>         return platform_driver_register(&fsl_guts_driver);
>>  }
>>  core_initcall(fsl_guts_init);
>
> I think we simply need to use the normal DT API rather than the of_flat_* one.
>

I thought so, yes that will be better. I will respin accordingly.

-- 
Regards,
Sudeep

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#1524538 — Re: [PATCH v2 -next] soc: fsl: fix section mismatch build warnings

On Thursday, November 17, 2016 3:11:59 PM CET Sudeep Holla wrote:
> 
> Cc: Scott Wood <oss@buserror.net>
> Cc: Yangbo Lu <yangbo.lu@nxp.com>
> Cc: Arnd Bergmann <arnd@arndb.de>
> Cc: Ulf Hansson <ulf.hansson@linaro.org>
> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
> 

Acked-by: Arnd Bergmann <arnd@arndb.de>

Ulf, can you pick this up into the mmc tree?

	Arnd

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#1525396 — Re: [PATCH v2 -next] soc: fsl: fix section mismatch build warnings

On 17 November 2016 at 16:25, Arnd Bergmann <arnd@arndb.de> wrote:
> On Thursday, November 17, 2016 3:11:59 PM CET Sudeep Holla wrote:
>>
>> Cc: Scott Wood <oss@buserror.net>
>> Cc: Yangbo Lu <yangbo.lu@nxp.com>
>> Cc: Arnd Bergmann <arnd@arndb.de>
>> Cc: Ulf Hansson <ulf.hansson@linaro.org>
>> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
>>
>
> Acked-by: Arnd Bergmann <arnd@arndb.de>
>
> Ulf, can you pick this up into the mmc tree?

Yes, I have applied it for my next branch, thanks!

Kind regards
Uffe

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#1524579 — [PATCH v2 -next] soc: fsl: fix section mismatch build warnings

We get the following warning with the driver is compiled in:

WARNING: modpost: Found 1 section mismatch(es).
To see full details build your kernel with:
'make CONFIG_DEBUG_SECTION_MISMATCH=y'

With CONFIG_DEBUG_SECTION_MISMATCH enabled, the details are reported:

WARNING: vmlinux.o(.text+0x55d014): Section mismatch in reference from the
function fsl_guts_probe() to the function
.init.text:of_flat_dt_get_machine_name()
The function fsl_guts_probe() references
the function __init of_flat_dt_get_machine_name().
This is often because fsl_guts_probe lacks a __init
annotation or the annotation of of_flat_dt_get_machine_name is wrong.

This patch fixes the issue by using the normal DT/OF API rather than
the of_flat_* one.

Cc: Scott Wood <oss@buserror.net>
Cc: Yangbo Lu <yangbo.lu@nxp.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
---
 drivers/soc/fsl/guts.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

v1->v2:
	- As suggested by Arnd, used standard DT APIs over of_flat_* API

diff --git a/drivers/soc/fsl/guts.c b/drivers/soc/fsl/guts.c
index 0ac88263c2d7..6af7a11f09a5 100644
--- a/drivers/soc/fsl/guts.c
+++ b/drivers/soc/fsl/guts.c
@@ -132,7 +132,7 @@ EXPORT_SYMBOL(fsl_guts_get_svr);

 static int fsl_guts_probe(struct platform_device *pdev)
 {
-	struct device_node *np = pdev->dev.of_node;
+	struct device_node *root, *np = pdev->dev.of_node;
 	struct device *dev = &pdev->dev;
 	struct resource *res;
 	const struct fsl_soc_die_attr *soc_die;
@@ -152,7 +152,10 @@ static int fsl_guts_probe(struct platform_device *pdev)
 		return PTR_ERR(guts->regs);

 	/* Register soc device */
-	machine = of_flat_dt_get_machine_name();
+	root = of_find_node_by_path("/");
+	if (of_property_read_string(root, "model", &machine))
+		of_property_read_string_index(root, "compatible", 0, &machine);
+	of_node_put(root);
 	if (machine)
 		soc_dev_attr.machine = devm_kstrdup(dev, machine, GFP_KERNEL);

--
2.7.4

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