Re: [PATCH] net: fix race in the receive/select

[Herbert Xu]

Andi Kleen <andi@xxxxxxxxxxxxxx> wrote:
> 
> At least on x86 I can't see how it happens. mb() is only a compile
> time barrier and the compiler doesn't optimize over indirect callbacks
> like __pollwait() anyways.

mb() does more than just a compiler barrier, it also issues mfence.

Cheers,
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