[patch 7.1.y 0/6] futex: Stable backports for recent issues

Greg!

The following series is the aggregate of the futex fixes which hit Linus
tree over the weekend:

d8aa5dd97944 ("futex: Fix might_sleep() warning in futex_pivot_pending()")
bde023808364 ("futex: Fix race on the initial mm->futex.phash.ref allocation")
c5f0bc9fd1ce ("futex/pi: Plug private futex exec() race")
f9ece060cc43 ("futex: Sanitize and document task_struct::futex::state transitions")
59b3732f95dd ("futex/pi: Reject cross-mm private futex owners")
8e7ff730dd96 ("futex: Fix race in futex_pivot_pending() during private hash resize")

Thanks,

	tglx