Re: atomics: document that linux expects certain atomic behaviourfrom unsigned long

[Alan Cox]

On Sat, 3 Jan 2009 13:44:00 +0100
Pavel Machek <pavel@xxxxxxx> wrote:

> Linux relies on unsigned long to behave like atomic for read/write.

Actually it isn't that simple and this advice shouldn't be given IMHO.

unsigned long is not the same as atomic in several respects including
ordering and caching of the result.

Alan
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