perf doc: Fix mmap failure checks in topdown example

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Use MAP_FAILED instead of NULL to detect mmap errors, and fix the
slots_p variable name typo in the sample code.

Signed-off-by: Hongfu Li <lihongfu@kylinos.cn>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

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Hongfu Li 2026-07-13 17:36:26 +08:00 • committed by Namhyung Kim

parent ea46211d7e

commit d30f2d869b

1 changed files with 2 additions and 2 deletions

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tools/perf/Documentation/topdown.txt

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