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"[" is part of the shell builtin test (and a synonym for it), not a link to the external command /usr/bin/test. Using the "test" is simpler because it avoids a lot of "[]". Suggested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Yanteng Si <siyanteng@loongson.cn> Acked-by: Huacai Chen <chenhuacai@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: loongarch@lists.linux.dev Cc: loongson-kernel@lists.loongnix.cn Link: https://lore.kernel.org/r/c50bc0a92dce0ff0fa6504c1a52fb53e2ac007bf.1692962043.git.siyanteng@loongson.cn Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>