Quoting Pavel Emelyanov (xemul@xxxxxxxxxx):
> The nslock spinlock is not used in the kernel at all.
> Remove it.
>
> Signed-off-by: Pavel Emelyanov <xemul@xxxxxxxxxx>
Acked-by: Serge Hallyn <serue@xxxxxxxxxx>
> ---
>
> 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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