Re: [PATCH] make atomic_t volatile on all architectures

[Linus Torvalds]

On Thu, 9 Aug 2007, Chuck Ebbert wrote:
> 
> You can use this forget() macro to make the compiler reread a variable:
> 
> #define forget(var) asm volatile ("" : "=m"(var))

No. That will also make the compiler "forget" any previous writes to it, 
so it changes behaviour.

You'd have to use "+m".

		Linus
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