Re: [PATCH] x86: Make variable_test_bit reference all of *addr
Date: Thu Oct 06 2011 - 23:14:35 EST
Memory clobbers are universal producers, not consumers.
Andi Kleen <andi@xxxxxxxxxxxxxx> wrote:
>"hpanvin@xxxxxxxxx" <hpa@xxxxxxxxx> writes:
>> This is concerning... the kernel relies heavily on asm volatile being
>a universal memory consumer. If that is suddenly broken, we are f***
>in many, many, MANY places in the kernel all of a sudden!
>I don't think that's true. We generally add "memory" clobbers for this
>purpose. asm volatile just means "don't move"
>Just this one doesn't have it for unknown reasons (someone
>ak@xxxxxxxxxxxxxxx -- Speaking for myself only
Sent from my Android phone with K-9 Mail. Please excuse my brevity.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/