linux-kernel - Re: [RFC PATCH v5 1/1] fpga: add an owner and use it to take the low-level module's refcount

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Date: Fri, 2 Feb 2024 18:44:01 +0100
From: Marco Pagani <marpagan@...hat.com>
To: Xu Yilun <yilun.xu@...ux.intel.com>
Cc: Moritz Fischer <mdf@...nel.org>, Wu Hao <hao.wu@...el.com>,
 Xu Yilun <yilun.xu@...el.com>, Tom Rix <trix@...hat.com>,
 Jonathan Corbet <corbet@....net>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Alan Tull <atull@...nsource.altera.com>, linux-kernel@...r.kernel.org,
 linux-doc@...r.kernel.org, linux-fpga@...r.kernel.org
Subject: Re: [RFC PATCH v5 1/1] fpga: add an owner and use it to take the
 low-level module's refcount



On 2024-01-30 05:31, Xu Yilun wrote:
>> +#define fpga_mgr_register_full(parent, info) \
>> +	__fpga_mgr_register_full(parent, info, THIS_MODULE)
>>  struct fpga_manager *
>> -fpga_mgr_register_full(struct device *parent, const struct fpga_manager_info *info);
>> +__fpga_mgr_register_full(struct device *parent, const struct fpga_manager_info *info,
>> +			 struct module *owner);
>>  
>> +#define fpga_mgr_register(parent, name, mops, priv) \
>> +	__fpga_mgr_register(parent, name, mops, priv, THIS_MODULE)
>>  struct fpga_manager *
>> -fpga_mgr_register(struct device *parent, const char *name,
>> -		  const struct fpga_manager_ops *mops, void *priv);
>> +__fpga_mgr_register(struct device *parent, const char *name,
>> +		    const struct fpga_manager_ops *mops, void *priv, struct module *owner);
>> +
>>  void fpga_mgr_unregister(struct fpga_manager *mgr);
>>  
>> +#define devm_fpga_mgr_register_full(parent, info) \
>> +	__devm_fpga_mgr_register_full(parent, info, THIS_MODULE)
>>  struct fpga_manager *
>> -devm_fpga_mgr_register_full(struct device *parent, const struct fpga_manager_info *info);
>> +__devm_fpga_mgr_register_full(struct device *parent, const struct fpga_manager_info *info,
>> +			      struct module *owner);
> 
> Add a line here. I can do it myself if you agree.

Sure, that is fine by me. I also spotted a typo in the commit log body
(in taken -> is taken). Do you want me to send a v6, or do you prefer
to fix that in place?

> 
> There is still a RFC prefix for this patch. Are you ready to get it merged?
> If yes, Acked-by: Xu Yilun <yilun.xu@...el.com>

I'm ready for the patch to be merged. However, I recently sent an RFC
to propose a safer implementation of try_module_get() that would
simplify the code and may also benefit other subsystems. What do you
think?

https://lore.kernel.org/linux-modules/20240130193614.49772-1-marpagan@redhat.com/

> Next time if you think patches are ready for serious review and merge, drop
> the RFC prefix. That avoids an extra query.

Okay, I'll do it like that next time.

Thanks,
Marco