Re: [KJ]remove SPIN_LOCK_UNLOCKED

[Roland Dreier]

 > Fact is, we cannot remove SPIN_LOCK_UNLOCKED. It's needed for
 > variables outside functions:
 > 
 > static spinlock_t foobar = SPIN_LOCK_UNLOCKED;

DEFINE_SPINLOCK() is provided to define variables that way.

 - R.
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