[Devel] Re: [PATCH] Remove unused member from nsproxy

[Pavel Emelyanov]

Cedric Le Goater wrote:
> Pavel Emelyanov wrote:
>> The nslock spinlock is not used in the kernel at all. 
> 
> it's also useless now that you have put some RCU rules around it.
> right ? 

Exactly!

> C.
> 
>> Remove it.
>> Signed-off-by: Pavel Emelyanov <xemul at openvz.org>
>>
>> ---
>>
>> diff --git a/include/linux/init_task.h b/include/linux/init_task.h
>> index a3f2541..cae35b6 100644
>> --- a/include/linux/init_task.h
>> +++ b/include/linux/init_task.h
>> @@ -73,7 +73,6 @@ extern struct nsproxy init_nsproxy;
>>  #define INIT_NSPROXY(nsproxy) {						\
>>  	.pid_ns		= &init_pid_ns,					\
>>  	.count		= ATOMIC_INIT(1),				\
>> -	.nslock		= __SPIN_LOCK_UNLOCKED(nsproxy.nslock),		\
>>  	.uts_ns		= &init_uts_ns,					\
>>  	.mnt_ns		= NULL,						\
>>  	INIT_NET_NS(net_ns)                                             \
>> diff --git a/include/linux/nsproxy.h b/include/linux/nsproxy.h
>> index 4d564d8..0e66b57 100644
>> --- a/include/linux/nsproxy.h
>> +++ b/include/linux/nsproxy.h
>> @@ -23,7 +23,6 @@ struct pid_namespace;
>>   */
>>  struct nsproxy {
>>  	atomic_t count;
>> -	spinlock_t nslock;
>>  	struct uts_namespace *uts_ns;
>>  	struct ipc_namespace *ipc_ns;
>>  	struct mnt_namespace *mnt_ns;
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> 
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