Re: [UBUNTU:acpi/ec] Use semaphore instead of spinlock

[Roland Dreier]

 > [UBUNTU:acpi/ec] Use semaphore instead of spinlock to get rid of missed
 > interrupts on ACPI EC (embedded controller)

 > -		spinlock_t lock;
 > +		struct semaphore sem;

 > +	init_MUTEX(&ec->poll.sem);

I think nowadays this should be a struct mutex...
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