From: Arnd Bergmann <[email protected]>
On 32-bit architectures with 64-bit resource_size_t, sp_rtc_probe()
causes a compiler warning:
drivers/rtc/rtc-sunplus.c: In function 'sp_rtc_probe':
drivers/rtc/rtc-sunplus.c:243:33: error: format '%x' expects argument of type 'unsigned int', but argument 4 has type 'resource_size_t' {aka 'long long unsigned int'} [-Werror=format=]
243 | dev_dbg(&plat_dev->dev, "res = 0x%x, reg_base = 0x%lx\n",
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The best way to print a resource is the special %pR format string,
and similarly to print a pointer we can use %p and avoid the cast.
Fixes: fad6cbe9b2b4 ("rtc: Add driver for RTC in Sunplus SP7021")
Signed-off-by: Arnd Bergmann <[email protected]>
---
drivers/rtc/rtc-sunplus.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/rtc/rtc-sunplus.c b/drivers/rtc/rtc-sunplus.c
index e8e2ab1103fc..4b578e4d44f6 100644
--- a/drivers/rtc/rtc-sunplus.c
+++ b/drivers/rtc/rtc-sunplus.c
@@ -240,8 +240,8 @@ static int sp_rtc_probe(struct platform_device *plat_dev)
if (IS_ERR(sp_rtc->reg_base))
return dev_err_probe(&plat_dev->dev, PTR_ERR(sp_rtc->reg_base),
"%s devm_ioremap_resource fail\n", RTC_REG_NAME);
- dev_dbg(&plat_dev->dev, "res = 0x%x, reg_base = 0x%lx\n",
- sp_rtc->res->start, (unsigned long)sp_rtc->reg_base);
+ dev_dbg(&plat_dev->dev, "res = %pR, reg_base = %p\n",
+ sp_rtc->res, sp_rtc->reg_base);
sp_rtc->irq = platform_get_irq(plat_dev, 0);
if (sp_rtc->irq < 0)
--
2.39.0
On 17/01/2023 18:24:44+0100, Arnd Bergmann wrote:
> From: Arnd Bergmann <[email protected]>
>
> On 32-bit architectures with 64-bit resource_size_t, sp_rtc_probe()
> causes a compiler warning:
>
> drivers/rtc/rtc-sunplus.c: In function 'sp_rtc_probe':
> drivers/rtc/rtc-sunplus.c:243:33: error: format '%x' expects argument of type 'unsigned int', but argument 4 has type 'resource_size_t' {aka 'long long unsigned int'} [-Werror=format=]
> 243 | dev_dbg(&plat_dev->dev, "res = 0x%x, reg_base = 0x%lx\n",
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> The best way to print a resource is the special %pR format string,
> and similarly to print a pointer we can use %p and avoid the cast.
>
I got this one this morning, which one is more correct? :)
https://lore.kernel.org/all/[email protected]/
> Fixes: fad6cbe9b2b4 ("rtc: Add driver for RTC in Sunplus SP7021")
> Signed-off-by: Arnd Bergmann <[email protected]>
> ---
> drivers/rtc/rtc-sunplus.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/rtc/rtc-sunplus.c b/drivers/rtc/rtc-sunplus.c
> index e8e2ab1103fc..4b578e4d44f6 100644
> --- a/drivers/rtc/rtc-sunplus.c
> +++ b/drivers/rtc/rtc-sunplus.c
> @@ -240,8 +240,8 @@ static int sp_rtc_probe(struct platform_device *plat_dev)
> if (IS_ERR(sp_rtc->reg_base))
> return dev_err_probe(&plat_dev->dev, PTR_ERR(sp_rtc->reg_base),
> "%s devm_ioremap_resource fail\n", RTC_REG_NAME);
> - dev_dbg(&plat_dev->dev, "res = 0x%x, reg_base = 0x%lx\n",
> - sp_rtc->res->start, (unsigned long)sp_rtc->reg_base);
> + dev_dbg(&plat_dev->dev, "res = %pR, reg_base = %p\n",
> + sp_rtc->res, sp_rtc->reg_base);
>
> sp_rtc->irq = platform_get_irq(plat_dev, 0);
> if (sp_rtc->irq < 0)
> --
> 2.39.0
>
--
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
On 1/17/23 09:55, Alexandre Belloni wrote:
> On 17/01/2023 18:24:44+0100, Arnd Bergmann wrote:
>> From: Arnd Bergmann <[email protected]>
>>
>> On 32-bit architectures with 64-bit resource_size_t, sp_rtc_probe()
>> causes a compiler warning:
>>
>> drivers/rtc/rtc-sunplus.c: In function 'sp_rtc_probe':
>> drivers/rtc/rtc-sunplus.c:243:33: error: format '%x' expects argument of type 'unsigned int', but argument 4 has type 'resource_size_t' {aka 'long long unsigned int'} [-Werror=format=]
>> 243 | dev_dbg(&plat_dev->dev, "res = 0x%x, reg_base = 0x%lx\n",
>> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>
>> The best way to print a resource is the special %pR format string,
>> and similarly to print a pointer we can use %p and avoid the cast.
>>
>
> I got this one this morning, which one is more correct? :)
> https://lore.kernel.org/all/[email protected]/
I prefer my handling of res->start and Arnd's no-cast handling of reg_base.
IMO using "%pR" prints too much info, but that's more up to the file's author
or maintainer...
How's that? :)
>> Fixes: fad6cbe9b2b4 ("rtc: Add driver for RTC in Sunplus SP7021")
>> Signed-off-by: Arnd Bergmann <[email protected]>
>> ---
>> drivers/rtc/rtc-sunplus.c | 4 ++--
>> 1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/rtc/rtc-sunplus.c b/drivers/rtc/rtc-sunplus.c
>> index e8e2ab1103fc..4b578e4d44f6 100644
>> --- a/drivers/rtc/rtc-sunplus.c
>> +++ b/drivers/rtc/rtc-sunplus.c
>> @@ -240,8 +240,8 @@ static int sp_rtc_probe(struct platform_device *plat_dev)
>> if (IS_ERR(sp_rtc->reg_base))
>> return dev_err_probe(&plat_dev->dev, PTR_ERR(sp_rtc->reg_base),
>> "%s devm_ioremap_resource fail\n", RTC_REG_NAME);
>> - dev_dbg(&plat_dev->dev, "res = 0x%x, reg_base = 0x%lx\n",
>> - sp_rtc->res->start, (unsigned long)sp_rtc->reg_base);
>> + dev_dbg(&plat_dev->dev, "res = %pR, reg_base = %p\n",
>> + sp_rtc->res, sp_rtc->reg_base);
>>
>> sp_rtc->irq = platform_get_irq(plat_dev, 0);
>> if (sp_rtc->irq < 0)
>> --
>> 2.39.0
>>
>
--
~Randy
On Tue, Jan 17, 2023, at 19:24, Randy Dunlap wrote:
> On 1/17/23 09:55, Alexandre Belloni wrote:
>> On 17/01/2023 18:24:44+0100, Arnd Bergmann wrote:
>>> From: Arnd Bergmann <[email protected]>
>>>
>>> On 32-bit architectures with 64-bit resource_size_t, sp_rtc_probe()
>>> causes a compiler warning:
>>>
>>> drivers/rtc/rtc-sunplus.c: In function 'sp_rtc_probe':
>>> drivers/rtc/rtc-sunplus.c:243:33: error: format '%x' expects argument of type 'unsigned int', but argument 4 has type 'resource_size_t' {aka 'long long unsigned int'} [-Werror=format=]
>>> 243 | dev_dbg(&plat_dev->dev, "res = 0x%x, reg_base = 0x%lx\n",
>>> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>>
>>> The best way to print a resource is the special %pR format string,
>>> and similarly to print a pointer we can use %p and avoid the cast.
>>>
>>
>> I got this one this morning, which one is more correct? :)
>> https://lore.kernel.org/all/[email protected]/
Both are equally correct, it's just a preference.
> I prefer my handling of res->start and Arnd's no-cast handling of reg_base.
> IMO using "%pR" prints too much info, but that's more up to the file's author
> or maintainer...
Right, I could have equally well picked the %pap version, and just
went for brevity in the source. It's only pr_debug(), so very few
users are going to actually see the output.
Arnd
On 1/17/23 11:36, Arnd Bergmann wrote:
> On Tue, Jan 17, 2023, at 19:24, Randy Dunlap wrote:
>> On 1/17/23 09:55, Alexandre Belloni wrote:
>>> On 17/01/2023 18:24:44+0100, Arnd Bergmann wrote:
>>>> From: Arnd Bergmann <[email protected]>
>>>>
>>>> On 32-bit architectures with 64-bit resource_size_t, sp_rtc_probe()
>>>> causes a compiler warning:
>>>>
>>>> drivers/rtc/rtc-sunplus.c: In function 'sp_rtc_probe':
>>>> drivers/rtc/rtc-sunplus.c:243:33: error: format '%x' expects argument of type 'unsigned int', but argument 4 has type 'resource_size_t' {aka 'long long unsigned int'} [-Werror=format=]
>>>> 243 | dev_dbg(&plat_dev->dev, "res = 0x%x, reg_base = 0x%lx\n",
>>>> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>>>
>>>> The best way to print a resource is the special %pR format string,
>>>> and similarly to print a pointer we can use %p and avoid the cast.
>>>>
>>>
>>> I got this one this morning, which one is more correct? :)
>>> https://lore.kernel.org/all/[email protected]/
>
> Both are equally correct, it's just a preference.
>
>> I prefer my handling of res->start and Arnd's no-cast handling of reg_base.
>> IMO using "%pR" prints too much info, but that's more up to the file's author
>> or maintainer...
>
> Right, I could have equally well picked the %pap version, and just
> went for brevity in the source. It's only pr_debug(), so very few
> users are going to actually see the output.
Alexandre, sounds like you should just go with Arnd's patch.
--
~Randy
On Tue, 17 Jan 2023 18:24:44 +0100, Arnd Bergmann wrote:
> On 32-bit architectures with 64-bit resource_size_t, sp_rtc_probe()
> causes a compiler warning:
>
> drivers/rtc/rtc-sunplus.c: In function 'sp_rtc_probe':
> drivers/rtc/rtc-sunplus.c:243:33: error: format '%x' expects argument of type 'unsigned int', but argument 4 has type 'resource_size_t' {aka 'long long unsigned int'} [-Werror=format=]
> 243 | dev_dbg(&plat_dev->dev, "res = 0x%x, reg_base = 0x%lx\n",
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> [...]
Applied, thanks!
[1/1] rtc: sunplus: fix format string for printing resource
commit: 08279468a294d8c996a657ecc9e51bd5c084c75d
--
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com