perf: Re-instate the linear PMU search

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Full revert of commit 9551fbb64d ("perf/core: Remove pmu linear
searching code").

Some architectures (notably arm/arm64) still relied on the linear
search in order to find the PMU that consumes
PERF_TYPE_{HARDWARE,HW_CACHE,RAW}.

This will need a more thorought audit and cleanup.

Reported-by: Nathan Chancellor <nathan@kernel.org>
Reported-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20230605101401.GL38236@hirez.programming.kicks-ass.net

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This commit is contained in:

Peter Zijlstra 2023-06-05 12:14:01 +02:00

parent 10d95a317e

commit 228020b490

1 changed files with 24 additions and 13 deletions

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37

kernel/events/core.c

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