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sched: Use trace_call__<tp>() to save a static branch

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The wrapper functions __trace_set_current_state() and
__trace_set_need_resched() allow the tracepoints to be called from code
outside sched/core.c, those calls are already guarded by a
tracepoint_enabled(<tp>) so there is no need to repeat this check once
again inside the call using trace_<tp>().

Use the new trace_call__<tp>() API to directly call the tracepoint
without check. Those helper functions must be called after the
appropriate check.

Signed-off-by: Gabriele Monaco <gmonaco@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260429094227.34087-1-gmonaco@redhat.com
This commit is contained in:
Gabriele Monaco
2026-04-29 11:41:37 +02:00
committed by Peter Zijlstra
parent 7fd2df204f
commit 4ac4d6549a
1 changed files with 11 additions and 3 deletions
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14
kernel/sched/core.c
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@@ -537,10 +537,14 @@ sched_core_dequeue(struct rq *rq, struct task_struct *p, int flags) { }
/* need a wrapper since we may need to trace from modules */
EXPORT_TRACEPOINT_SYMBOL(sched_set_state_tp);
/* Call via the helper macro trace_set_current_state. */
/*
* Call via the helper macro trace_set_current_state.
* Calls to this function MUST be guarded by a
* tracepoint_enabled(sched_set_state_tp)
*/
void __trace_set_current_state(int state_value)
{
trace_sched_set_state_tp(current, state_value);
trace_call__sched_set_state_tp(current, state_value);
}
EXPORT_SYMBOL(__trace_set_current_state);
@@ -1203,9 +1207,13 @@ static void __resched_curr(struct rq *rq, int tif)
}
}
/*
* Calls to this function MUST be guarded by a
* tracepoint_enabled(sched_set_need_resched_tp)
*/
void __trace_set_need_resched(struct task_struct *curr, int tif)
{
trace_sched_set_need_resched_tp(curr, smp_processor_id(), tif);
trace_call__sched_set_need_resched_tp(curr, smp_processor_id(), tif);
}
EXPORT_SYMBOL_GPL(__trace_set_need_resched);