why does interrupt need to turned off before taking spin lock

Question

Anonimo · Accepted Answer

he is looking for answer relevent on linux.

Anonimo · Answer

You have to protect a critical section. If you enter a spin lock and acquire the lock, you will then be in a critical section. You have to make sure you don't get an interrupt which takes you out of a critical section before it is completed and the lock is cleared.

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