Hmm. What about this (untested, but simple) code? It saves the flags
in one function and restores them in another, but the flags variable
is not shared with anyone else.
I think I've heard that you aren't supposed to do this, but I'm
interested to know why. (And whether it's true!)
static spinlock_t mylock = SPIN_LOCK_UNLOCKED;
static void unlock(unsigned long flags)
{
spin_unlock_irqrestore(&mylock, flags);
}
void demo(void)
{
unsigned long flags;
spin_lock_irqsave(&mylock, flags);
/* use locked resource ... */
unlock(flags);
}
--
--Ed L Cashin | PGP public key:
ecashin@uga.edu | http://noserose.net/e/pgp/
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