On Wed, May 23, 2012 at 9:42 AM, H. Peter Anvin <hpa@xxxxxxxxx> wrote:
> On 05/23/2012 09:40 AM, Linus Torvalds wrote:
>
> And it doesn't work in assembly. However, I really question the assumption.
The asm case is *trivial*.
asm cannot handle anything but constant shifts anyway, so the BIT()
constness rules would remain. But since asm doesn't have any integer
types, you simply do
#ifdef __ASSEMBLY__
#define BIT(x) (1<<(x))
#else
.. the C type-morphing one ..
#endif
As to questioning the assumption, you're simply wrong. BIT(0)
absolutely MUST NOT be a 64-bit value on a 32-bit kernel. End of
discussion. This isn't an "assumption", it's an axiom.
Linus
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