From d67b8d7bd88123af2802c14a9815ecbac0567cfa Mon Sep 17 00:00:00 2001 From: Zhigang Lu Date: Thu, 9 Jul 2015 16:25:12 +0800 Subject: [PATCH] eal: allow empty compile time cpu flags When RTE_COMPILE_TIME_CPUFLAGS is empty, the rte_cpu_check_supported() code breaks with a "comparison is always false due to limited range of data type". This is because the compile_time_flags[] array is empty. Assigning the array dimension to a local variable apparently solves this. Signed-off-by: Cyril Chemparathy Signed-off-by: Zhigang Lu Acked-by: Bruce Richardson --- lib/librte_eal/common/eal_common_cpuflags.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/lib/librte_eal/common/eal_common_cpuflags.c b/lib/librte_eal/common/eal_common_cpuflags.c index 6fd360cbb2..8ba7b30e0c 100644 --- a/lib/librte_eal/common/eal_common_cpuflags.c +++ b/lib/librte_eal/common/eal_common_cpuflags.c @@ -30,6 +30,7 @@ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ +#include #include /* @@ -62,10 +63,10 @@ rte_cpu_check_supported(void) static const enum rte_cpu_flag_t compile_time_flags[] = { RTE_COMPILE_TIME_CPUFLAGS }; - unsigned i; + unsigned count = RTE_DIM(compile_time_flags), i; int ret; - for (i = 0; i < sizeof(compile_time_flags)/sizeof(compile_time_flags[0]); i++) { + for (i = 0; i < count; i++) { ret = rte_cpu_get_flag_enabled(compile_time_flags[i]); if (ret < 0) { -- 2.20.1