sched/isolation: Prep work for pcp cache draining isolation

For reference: https://lore.kernel.org/lkml/20230125073502.743446-1-leobras-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org/
And the latest proposal: https://lore.kernel.org/lkml/[email protected]/

Pcp cache draining isolation needs a function that abstracts checking if a CPU is isolated through isolcpus= or nohz_full=. Take advantage of that to do some cleanups.

Frederic Weisbecker (2):
sched/isolation: Merge individual nohz_full features into a common
housekeeping flag
sched/isolation: Add cpu_is_isolated() API

 arch/x86/kvm/x86.c              |  2 +-
 drivers/char/random.c           |  2 +-
 drivers/pci/pci-driver.c        |  2 +-
 include/linux/sched/isolation.h | 13 +++++++------
 include/net/ip_vs.h             |  4 ++--
 kernel/cpu.c                    |  4 ++--
 kernel/kthread.c                |  4 ++--
 kernel/rcu/tasks.h              |  2 +-
 kernel/rcu/tree_plugin.h        |  6 +++---
 kernel/sched/core.c             | 12 ++++++------
 kernel/sched/fair.c             |  6 +++---
 kernel/sched/isolation.c        | 22 ++++++----------------
 kernel/watchdog.c               |  2 +-
 kernel/workqueue.c              |  2 +-
 net/core/net-sysfs.c            |  2 +-
 net/netfilter/ipvs/ip_vs_ctl.c  |  2 +-
 16 files changed, 39 insertions(+), 48 deletions(-)

2.34.1