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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-03-30 18:29:05 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-03-30 18:29:05 -0700 |
| commit | 336622e9fce7a0b8243e1cd9f6e1c24d96f13cd8 (patch) | |
| tree | a92d7a0e419e825d398b64252493224e37cb0ca0 /kernel | |
| parent | 992a1a3b45b5c0b6e69ecc2a3f32b0d02da28d58 (diff) | |
| parent | e4970c9c54d7cb4edc24d82ed27aef69aaf593de (diff) | |
Merge tag 'timers-nohz-2020-03-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull NOHZ update from Thomas Gleixner:
"Remove TIF_NOHZ from three architectures
These architectures use a static key to decide whether context
tracking needs to be invoked and the TIF_NOHZ flag just causes a
pointless slowpath execution for nothing"
* tag 'timers-nohz-2020-03-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
arm64: Remove TIF_NOHZ
arm: Remove TIF_NOHZ
x86: Remove TIF_NOHZ
context-tracking: Introduce CONFIG_HAVE_TIF_NOHZ
x86/entry: Remove _TIF_NOHZ from _TIF_WORK_SYSCALL_ENTRY
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/context_tracking.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/context_tracking.c b/kernel/context_tracking.c index 0296b4bda8f1..ce430885c26c 100644 --- a/kernel/context_tracking.c +++ b/kernel/context_tracking.c @@ -198,11 +198,13 @@ void __init context_tracking_cpu_set(int cpu) if (initialized) return; +#ifdef CONFIG_HAVE_TIF_NOHZ /* * Set TIF_NOHZ to init/0 and let it propagate to all tasks through fork * This assumes that init is the only task at this early boot stage. */ set_tsk_thread_flag(&init_task, TIF_NOHZ); +#endif WARN_ON_ONCE(!tasklist_empty()); initialized = true; |