can not resolve global kernel variable.

[Eugene Goubine]

Hello , dear list users.
>From my module I am trying to register for the system suspend using the *
register_pm_notifier(nb)*
which is expanded to *blocking_notifier_chain_register(&pm_chain_head, nb).*
**
I have a linker warning which tells "pm_chain_head" is undefined. I do
see  pm_chain_head in my /proc/kallsyms.
What do I miss? Thank you.
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