sched/preempt: Refactor sched_dynamic_update()

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Currently sched_dynamic_update needs to open-code the enabled/disabled
function names for each preemption model it supports, when in practice
this is a boolean enabled/disabled state for each function.

Make this clearer and avoid repetition by defining the enabled/disabled
states at the function definition, and using helper macros to perform the
static_call_update(). Where x86 currently overrides the enabled
function, it is made to provide both the enabled and disabled states for
consistency, with defaults provided by the core code otherwise.

In subsequent patches this will allow us to support PREEMPT_DYNAMIC
without static calls.

There should be no functional change as a result of this patch.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Frederic Weisbecker <frederic@kernel.org>
Link: https://lore.kernel.org/r/20220214165216.2231574-3-mark.rutland@arm.com

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This commit is contained in:

Mark Rutland 2022-02-14 16:52:11 +00:00 • committed by Peter Zijlstra

parent 4c7485584d

commit 8a69fe0be1

3 changed files with 45 additions and 26 deletions

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10

arch/x86/include/asm/preempt.h

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2

include/linux/entry-common.h

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59

kernel/sched/core.c

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