Linux 3.15 rc4

Nothing particularly unusual going on. 45% drivers (drm, sound, md,pin-control, acpi etc), 40% arch (mainly powerpc/powernv, but x86 andarm too), 15% misc (perf tooling, documentation updates, core code).The appended shortlog gives some kind of overview of the detailswithout being _too_ big.There's a few known things pending still (pending fix for someinteresting dentry list corruption, for example - not that anyremotely normal use will likely ever hit it), but on the whole thingsare fairly calm and nothing horribly scary. We're in the middle of thecalming-down period, so that's just how I like it.But the more testing we get, the better, so please do give this a whirl,                  Linus