Linux 4.2 rc4

Another week, another rc.I really wish that things were calming down, but it hasn't happenedquite yet. It's not like this is particularly big or scary, but it'salso not at the stage where it's really starting to get quiet and thebugs are really small and esoteric.So we still had some bugs due to the low-level x86 asm cleanup work,and the 32-bit compat 'syscall' instruction (only used on AMD) wassubtly broken.  That should be all fixed now, so if you run a 64-bitkernel and have 32-bit user space (including things like wine etc) andsaw problems earlier, go ahead and update.Of course, please go ahead and update even if you didn't see problems,just to test the new rc.Other than that issue, it's mostly drivers and networking.  USB, gpu,mmc, network drivers, sound. With some ARM noise (but even that ismostly driver-related: dts updates due to MMC fixes). And a few smallfilesystem fixes.Go forth and test,                 Linus