Re: [PATCH 1/3] kernel.h: Add DO_ONCE statement expression macro

[H. Peter Anvin]

Joe Perches wrote:
> 
> Add a DO_ONCE statement expression analogous to printk_once
> that executes any arbitrary statement exactly once.
> 

If you're truly going to make that guarantee you should use an atomic
test and set.

	-hpa
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