Re: [CHECKER] repetitive/contradictory comparison bugs for 2.4.7

Alan Cox (alan@lxorguk.ukuu.org.uk)
Thu, 26 Jul 2001 23:06:02 +0100 (BST)

> How will this be guaranteed to help handle a race, when gcc is
> likely either to have tmp_buf in a register (not declared
> volatile), or perhaps even optimize out the second reference.

The function call is a synchronization point, and the function it calls
might change the value. I put the barriers into my tree to make this clear
although I cant see some future super gcc globally optimising that one
anyway

Alan
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