On Wed, 2012-02-01 at 16:19 +0100, Jan Kara wrote: > I've raised the issue with our GCC guys and they said to me that: "C does > not provide such guarantee, nor can you reliably lock different > structure fields with different locks if they share naturally aligned > word-size memory regions. The C++11 memory model would guarantee this, > but that's not implemented nor do you build the kernel with a C++11 > compiler."
That's interesting. So it seems like there are two solutions: 1) Use the same lock for a given bitfield 2) Split up the bitfield into different words
