Revert "sched,rt: disable rt_runtime borrowing by default"

This reverts commit e5d103425e9398fd8ce4532507f828b11d82b149.
Revert "sched: reinitialize rq->next_balance when a CPU is hot-added"

This reverts commit dc962698d4de8de8002d8dd7a57e1332f128ed7c.
Revert "sched: Micro-optimize the smart wake-affine logic"

This reverts commit 47272312d8b2401e80b1a8f7fc7c1ae77cf62030.
Revert "sched: Implement smarter wake-affine logic"

This reverts commit a6b41e5f13487701953309af27990733f39060cc.
Revert "sched: Fix select_idle_sibling() bouncing cow syndrome"

This reverts commit df0db108118d7dc36ac3d39d0217e1e31ff35253.
update defconfig
Revert "sync: don't block the flusher thread waiting on IO"

This reverts commit c5f729922d71170b2c5f683b575bf5bfc67c1230.
Revert "mm: pass readahead info down to the i/o scheduler"

This reverts commit b377c7715faa2efae547055ec51cd2c9b7abce7a.

Conflicts:
	include/linux/page-flags.h