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When cross-compiling the perf tool for ARM64, `perf help` may crash with the following assertion failure: help.c:122: exclude_cmds: Assertion `cmds->names[ci] == NULL' failed. This happens when the perf binary is not named exactly "perf" or when multiple "perf-*" binaries exist in the same directory. In such cases, the `excludes` command list can be empty, which leads to the final assertion in exclude_cmds() being triggered. Add a simple guard at the beginning of exclude_cmds() to return early if excludes->cnt is zero, preventing the crash. Signed-off-by: hupu <hupu.gm@gmail.com> Reported-by: Guilherme Amadio <amadio@gentoo.org> Reviewed-by: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/r/20250909094953.106706-1-amadio@gentoo.org Signed-off-by: Namhyung Kim <namhyung@kernel.org>