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Avoid DIR allocations when scanning sysfs by using io_dir for the readdir implementation, that allocates about 1kb on the stack. Signed-off-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20250222061015.303622-7-irogers@google.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>