Revert "sched: don't call task_group() many times in set_task_rq()"

This reverts commit c8c7b2901bd56f537fb7287f9c489da589a3068d.
Revert "sched: reduce sleep duration in wait_task_inactive"

This reverts commit b00f637fb1b9ca95a474ec6a04d4be00393a9c22.
Revert "max77693: fix overbloated debug message"

This reverts commit fc3aaac071c85a12e0787c8c61c2017d42223c87.
Revert "writeback: Don't call writeback_set_ratelimit() too often during hotplug"

This reverts commit fcdc2d7438b575139843aed2f2ae5a4ff24b2bb1.
Revert "namespace: mount with NODIRATIME by default"

This reverts commit 5c9b2ae3d0816a47f0fb57163ccb4679ce048091.
Revert "namespace: REALTIME by default changed to NOATIME"

This reverts commit c0b0847f3c74909eca39a85491ce59a0e31ec462.