Re: [PATCH 5/6] sparc: use the asm-generic version of cpuinfo_op

Conor.Dooley
2022-08-26T15:38:00Z

On 26/08/2022 15:47, Sam Ravnborg wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
>
> Hi Conor.
>
> Thanks for this nice simplification, but I think you can make it even
> better.
>
> On Sun, Aug 21, 2022 at 12:35:12PM +0100, Conor Dooley wrote:
>> From: Conor Dooley <conor.dooley@microchip.com>
>>
>> There's little point in duplicating the declaration of cpuinfo_op now
>> that there's a shared version of it, so drop it & include the generic
>> header.
>>
>> Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
>> ---
>> arch/sparc/include/asm/cpudata.h | 3 +--
>> 1 file changed, 1 insertion(+), 2 deletions(-)
>>
>> diff --git a/arch/sparc/include/asm/cpudata.h b/arch/sparc/include/asm/cpudata.h
>> index d213165ee713..af6ef3c028a9 100644
>> --- a/arch/sparc/include/asm/cpudata.h
>> +++ b/arch/sparc/include/asm/cpudata.h
>> @@ -6,8 +6,7 @@
>>
>> #include <linux/threads.h>
>> #include <linux/percpu.h>
>> -
>> -extern const struct seq_operations cpuinfo_op;
>> +#include <asm-generic/processor.h>
>
> Since the header file did not need <asm-generic/processor.h> then it
> should not need it now after deleting stuff.
> The better fix is to add the missing include to arch/sparc/kernel/cpu.c,
> where we have the user of it.
>
> A header file should include what it needs, and no more.
>
> I looked only at this patch, this comment may also be relevant for the
> other patches.

Hey Sam, thanks for your feedback.
As per Geert's suggestion, submitted a v2:
https://lore.kernel.org/linux-riscv/20220825205942.1713914-1-mail@conchuod.ie/T/#u

In v2, I included linux/processor.h instead of an asm-generic header.
The diff for sparc became:

diff --git a/arch/sparc/include/asm/cpudata.h b/arch/sparc/include/asm/cpudata.h
index d213165ee713..f7e690a7860b 100644
--- a/arch/sparc/include/asm/cpudata.h
+++ b/arch/sparc/include/asm/cpudata.h
@@ -7,8 +7,6 @@
#include <linux/threads.h>
#include <linux/percpu.h>

-extern const struct seq_operations cpuinfo_op;
-
#endif /* !(__ASSEMBLY__) */

#if defined(__sparc__) && defined(__arch64__)
diff --git a/arch/sparc/kernel/cpu.c b/arch/sparc/kernel/cpu.c
index 79cd6ccfeac0..ffdc7a825b80 100644
--- a/arch/sparc/kernel/cpu.c
+++ b/arch/sparc/kernel/cpu.c
@@ -12,6 +12,7 @@
#include <linux/smp.h>
#include <linux/threads.h>
#include <linux/pgtable.h>
+#include <linux/processor.h>

#include <asm/spitfire.h>
#include <asm/oplib.h>

Hopefully that is more appealing to you!
Thanks,
Conor.