We currently have uapi versions of <asm/siginfo.h> which at least on a few architectures define bits of the userspace ABI before including an uapi asm-generic version, and also non-uapi versions which do almost nothing except for making sure other headers include the right uapi one before including an asm-generic that defined two prototypes and a few defines that aren't architecture specific in any. This series completely gets rid of the non-uapi versions and cleans up various small bits on the way. Note that Thomas has some posix-timers work overlapping with this, so it might make sense to take these through the tip tree.
