linux-kernel - Re: [PATCH] pds_core: add stub macros for pdsc_debufs_* when ! CONFIG_DEBUG

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Message-ID: <e0d252e7-a025-511e-22b3-c46f1f7ac054@redhat.com>
Date:   Wed, 3 May 2023 05:32:29 -0700
From:   Tom Rix <trix@...hat.com>
To:     Jiri Pirko <jiri@...nulli.us>
Cc:     shannon.nelson@....com, brett.creeley@....com, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] pds_core: add stub macros for pdsc_debufs_* when !
 CONFIG_DEBUG_FS


On 5/3/23 12:36 AM, Jiri Pirko wrote:
> Tue, May 02, 2023 at 04:52:20PM CEST, trix@...hat.com wrote:
>> When CONFIG_DEBUG_FS is not defined there is this representative link error
>> ld: drivers/net/ethernet/amd/pds_core/main.o: in function `pdsc_remove':
>> main.c:(.text+0x35c): undefined reference to `pdsc_debugfs_del_dev
>>
>> Avoid these link errors when CONFIG_DEBUG_FS is not defined by
>> providing some empty macros.
>>
>> Signed-off-by: Tom Rix <trix@...hat.com>
>> ---
>> drivers/net/ethernet/amd/pds_core/core.h | 12 ++++++++++++
>> 1 file changed, 12 insertions(+)
>>
>> diff --git a/drivers/net/ethernet/amd/pds_core/core.h b/drivers/net/ethernet/amd/pds_core/core.h
>> index e545fafc4819..0b39a6dc65c8 100644
>> --- a/drivers/net/ethernet/amd/pds_core/core.h
>> +++ b/drivers/net/ethernet/amd/pds_core/core.h
>> @@ -261,6 +261,7 @@ int pdsc_dl_enable_validate(struct devlink *dl, u32 id,
>>
>> void __iomem *pdsc_map_dbpage(struct pdsc *pdsc, int page_num);
>>
>> +#ifdef CONFIG_DEBUG_FS
>> void pdsc_debugfs_create(void);
>> void pdsc_debugfs_destroy(void);
>> void pdsc_debugfs_add_dev(struct pdsc *pdsc);
>> @@ -270,6 +271,17 @@ void pdsc_debugfs_add_viftype(struct pdsc *pdsc);
>> void pdsc_debugfs_add_irqs(struct pdsc *pdsc);
>> void pdsc_debugfs_add_qcq(struct pdsc *pdsc, struct pdsc_qcq *qcq);
>> void pdsc_debugfs_del_qcq(struct pdsc_qcq *qcq);
>> +#else
>> +#define pdsc_debugfs_create()
>> +#define pdsc_debugfs_destroy()
>> +#define pdsc_debugfs_add_dev(pdsc)
>> +#define pdsc_debugfs_del_dev(pdsc)
>> +#define pdsc_debugfs_add_ident(pdsc)
>> +#define pdsc_debugfs_add_viftype(pdsc)
>> +#define pdsc_debugfs_add_irqs(pdsc)
>> +#define pdsc_debugfs_add_qcq(pdsc, qcq)
>> +#define pdsc_debugfs_del_qcq(qcq)
> Usually this is done using static inline stub functions. Any reason to
> not to do it in the same way?

I do not mind changing the patch if that is what is required.

However I believe Paolo said the change was being handled by another patch.

Tom

>
>
>> +#endif
>>
>> int pdsc_err_to_errno(enum pds_core_status_code code);
>> bool pdsc_is_fw_running(struct pdsc *pdsc);
>> -- 
>> 2.27.0
>>