Re: rcu_read_lock lost its compiler barrier

[Herbert Xu]

On Sun, Jun 02, 2019 at 08:47:07PM -0700, Paul E. McKenney wrote:
>
> 	CPU2:         if (b != 1)
> 	CPU2:                 b = 1;

Stop right there.  The kernel is full of code that assumes that
assignment to an int/long is atomic.  If your compiler breaks this
assumption that we can kiss the kernel good-bye.

Cheers,
-- 
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
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