Re: [PATCH] zram: remove global tb_lock by using lock-free CAS

[Joonsoo Kim]

>> Most popular use of zram is the in-memory swap for small embedded system
>> so I don't want to increase memory footprint without good reason although
>> it makes synthetic benchmark. Alhought it's 1M for 1G, it isn't small if we
>> consider compression ratio and real free memory after boot

We can use bit spin lock and this would not increase memory footprint for 32 bit
platform.

Thanks.
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