[PATCH 2/2] implement new notifier function to panic_notifier_list

[Takenori Nagano]

Vivek Goyal wrote:
> On Thu, Oct 04, 2007 at 08:38:50PM +0900, Takenori Nagano wrote:
>
>> @@ -522,8 +530,8 @@ setup_arch(char **cmdline_p)
>>  	}
>>
>>  	/* Register a call for panic conditions. */
>> -	atomic_notifier_chain_register(&panic_notifier_list,
>> -			&alpha_panic_block);
>> +	tunable_notifier_chain_register(&panic_notifier_list,
>> +			&alpha_panic_block, "alpha_panic", NULL);
>>
> 
> I think it might be good idea to somehow create provisions for another a
> help string. This help string will inform admin that what a registered
> user does? Ideally this should be visible in /sys/kernel/debug/<user module>/description file.

Hi Vivek,

We can make description file with tunable_notifier_chain_register 4th argument.
If developer sets 4th argument, tunable_notifier_chain_register makes
/sys/kernel/debug/<name>/description file. Admin can get information from the
description file.

+/**
+ *	tunable_notifier_chain_register - Add notifier to an tunable notifier chain
+ *	@nh: Pointer to head of the tunable notifier chain
+ *	@n: New entry in notifier chain
+ *	@name: Pointer to the name of the new notifier entry
+ *	@desc: Pointer to the description of new entry
+ *
+ *	Adds a notifier to an tunable notifier chain and makes control dir.
+ *
+ *	Returns zero on success or %-ENODEV on failure.
+ */

Thanks,

Takenori Nagano <t-nagano at ah.jp.nec.com>