Question: Atomic instructions such as compare-and-swap and test-and-set also execute a memory fence as part of the instruction on many architectures. Explain what is the motivation

Atomic instructions such as compare-and-swap and test-and-set also execute a memory fence as part of the instruction on many architectures. Explain what is the motivation for executing the memory fence, from the viewpoint of data in shared memory that is protected by a mutex implemented by the atomic

Instruction.

Also explain what a process should do before releasing a mutex.

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