[PATCHv3 04/10] linux/kernel: introduce lower_48_bits macro

[Keith Busch]

On Tue, Feb 22, 2022 at 12:31:30PM -0800, Joe Perches wrote:
> > I'd only use something GENMASK() for bit ranges.
> > Even then it is often easier to just write the value in hex.
> 
> Mostly it's the count of the repeated f that's difficult to
> quickly verify visually.

I admit I made this counting mistake in earlier versions of this series.

I think the earlier suggested "(1ull << 48) - 1" style in an inline
function seems good, and it doesn't appear to cause compiler concerns.