tick/nohz: Move tick_nohz_full_mask declaration outside the #ifdef

tick_nohz_full_mask lists the CPUs that are nohz_full. This is only needed when
CONFIG_NO_HZ_FULL is defined. tick_nohz_full_cpu() allows a specific CPU to be
tested against the mask, and evaluates to false when CONFIG_NO_HZ_FULL is not
defined.

The resctrl code needs to pick a CPU to run some work on, a new helper prefers
housekeeping CPUs by examining the tick_nohz_full_mask. Hiding the declaration
behind #ifdef CONFIG_NO_HZ_FULL forces all the users to be behind an #ifdef
too.

Move the tick_nohz_full_mask declaration, this lets callers drop the #ifdef,
and guard access to tick_nohz_full_mask with IS_ENABLED() or something like
tick_nohz_full_cpu().

The definition does not need to be moved as any callers should be removed at
compile time unless CONFIG_NO_HZ_FULL is defined.

Signed-off-by: James Morse <[email protected]>
Signed-off-by: Borislav Petkov (AMD) <[email protected]>
Reviewed-by: Shaopeng Tan <[email protected]>
Reviewed-by: Thomas Gleixner <[email protected]>
Acked-by: Reinette Chatre <[email protected]> # for resctrl dependency
Tested-by: Shaopeng Tan <[email protected]>
Tested-by: Peter Newman <[email protected]>
Tested-by: Carl Worth <[email protected]> # arm64
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Borislav Petkov (AMD) <[email protected]>

0 files changed, 0 insertions, 0 deletions