> can rwlock_init and spin_lock_init be used outside of functions declared
> __init. The spinlock documentation suggests that it can't but I'd like
> someone to confirm that.
Those function can be used in any function. A function is declared
__init if it only runs during the kernel startup, so that the memory
holding the code for __init functions can be freed once startup is
done. However, spin_lock_init() is just used to initialize a freshly
allocated spinlock, and spinlocks may be allocated at any time, even
long after the kernel is done starting up. A quick look throught
kernel source code will show many, many examples where
spin_lock_init(), rwlock_init(), mutex_init(), etc. are called from
non-__init functions.
- R.
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