Messages in this thread | | | From | Linus Torvalds <> | Date | Tue, 12 Feb 2013 09:00:30 -0800 | Subject | Re: [tip:x86/mm] x86, mm: Use a bitfield to mask nuisance get_user() warnings |
| |
On Tue, Feb 12, 2013 at 8:38 AM, H.J. Lu <hjl.tools@gmail.com> wrote: > > Can you do something similar to what we did in glibc:
No. Because we use macros to be type-independent (i e"get_user()" works *regardless* of type), so casting to "uintptr_t" doesn't work. It throws away the type information, and truncates 64-bit values on 32-bit architectures.
The whole point of the bitmask thing is that it doesn't have that issue, and gets the size correct automatically. It's not pretty, but it allows the rest of the sources to be readable.
Linus
| |