sched: fair: move unused stub functions to header

These four functions have a normal definition for CONFIG_FAIR_GROUP_SCHED,
and empty one that is only referenced when FAIR_GROUP_SCHED is disabled
but CGROUP_SCHED is still enabled.  If both are turned off, the functions
are still defined but the misisng prototype causes a W=1 warning:

kernel/sched/fair.c:12544:6: error: no previous prototype for 'free_fair_sched_group'
kernel/sched/fair.c:12546:5: error: no previous prototype for 'alloc_fair_sched_group'
kernel/sched/fair.c:12553:6: error: no previous prototype for 'online_fair_sched_group'
kernel/sched/fair.c:12555:6: error: no previous prototype for 'unregister_fair_sched_group'

Move the alternatives into the header as static inline functions with the
correct combination of #ifdef checks to avoid the warning without adding
even more complexity.

[A different patch with the same description got applied by accident
 and was later reverted, but the original patch is still missing]

Link: https://lkml.kernel.org/r/[email protected]
Fixes: 7aa55f2a5902 ("sched/fair: Move unused stub functions to header")
Signed-off-by: Arnd Bergmann <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: David Woodhouse <[email protected]>
Cc: Dinh Nguyen <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Ivan Kokshaysky <[email protected]>
Cc: John Paul Adrian Glaubitz <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Masahiro Yamada <[email protected]>
Cc: Matt Turner <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Nathan Chancellor <[email protected]>
Cc: Nicolas Schier <[email protected]>
Cc: Palmer Dabbelt <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Richard Henderson <[email protected]>
Cc: Richard Weinberger <[email protected]>
Cc: Rich Felker <[email protected]>
Cc: Stephen Rothwell <[email protected]>
Cc: Thomas Bogendoerfer <[email protected]>
Cc: Tudor Ambarus <[email protected]>
Cc: Yoshinori Sato <[email protected]>
Cc: Zhihao Cheng <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions