perf: Shrink the size of the recursion counter.

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There are four recursion counter, one for each context. The type of the
counter is `int' but the counter is used as `bool' since it is only
incremented if zero.
The main goal here is to shrink the whole struct into 32bit int which
can later be added task_struct into an existing hole.

Reduce the type of the recursion counter to an unsigned char, keep the
increment/ decrement operation.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Marco Elver <elver@google.com>
Link: https://lore.kernel.org/r/20240704170424.1466941-5-bigeasy@linutronix.de

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Sebastian Andrzej Siewior 2024-07-04 19:03:38 +02:00 • committed by Peter Zijlstra

parent c5d93d23a2

commit 5af42f928f

3 changed files with 4 additions and 4 deletions

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2

kernel/events/callchain.c

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2

kernel/events/core.c

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4

kernel/events/internal.h

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