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From: Cyril Chemparathy <cchemparathy@ezchip.com>
To: dev@dpdk.org
Subject: [dpdk-dev] [PATCH v2 04/12] eal: allow empty compile time flags
Date: Mon, 22 Jun 2015 11:58:36 -0700	[thread overview]
Message-ID: <1434999524-26528-5-git-send-email-cchemparathy@ezchip.com> (raw)
In-Reply-To: <1434999524-26528-1-git-send-email-cchemparathy@ezchip.com>

The rte_cpu_check_supported() code breaks with a "comparison is always
false due to limited range of data type" when the compile_time_flags[]
array is empty.  Assigning the array dimension to a local variable
apparently solves this.

Change-Id: I0ae21f529cf7b6dd9cf0f4532dce9198f4bf4230
Signed-off-by: Cyril Chemparathy <cchemparathy@ezchip.com>
---
 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 6fd360c..8ba7b30 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 <rte_common.h>
 #include <rte_cpuflags.h>
 
 /*
@@ -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) {
-- 
2.1.2

  parent reply	other threads:[~2015-06-22 18:58 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <1434999524-26528-1-git-send-email-cchemparathy@ezchip.com>
2015-06-22 18:58 ` [dpdk-dev] [PATCH v2 01/12] test: limit x86 cpuflags checks to x86 builds Cyril Chemparathy
2015-06-22 18:58 ` [dpdk-dev] [PATCH v2 02/12] hash: fix compilation on non-X86 platforms Cyril Chemparathy
2015-06-22 18:58 ` [dpdk-dev] [PATCH v2 03/12] hash: check SSE flags only on x86 builds Cyril Chemparathy
2015-06-22 18:58 ` Cyril Chemparathy [this message]
2015-06-22 18:58 ` [dpdk-dev] [PATCH v2 05/12] config: remove RTE_LIBNAME definition Cyril Chemparathy
2015-06-22 18:58 ` [dpdk-dev] [PATCH v2 06/12] memzone: refactor rte_memzone_reserve() variants Cyril Chemparathy
2015-06-22 18:58 ` [dpdk-dev] [PATCH v2 07/12] memzone: allow multiple pagesizes to be requested Cyril Chemparathy
2015-06-22 18:58 ` [dpdk-dev] [PATCH v2 08/12] mempool: allow config override on element alignment Cyril Chemparathy
2015-06-23  0:31   ` Ananyev, Konstantin
2015-06-23 20:43     ` Cyril Chemparathy
2015-06-23 21:21       ` Ananyev, Konstantin
2015-06-22 18:58 ` [dpdk-dev] [PATCH v2 09/12] tile: add page sizes for TILE-Gx/Mx platforms Cyril Chemparathy
2015-06-22 18:58 ` [dpdk-dev] [PATCH v2 10/12] tile: initial TILE-Gx support Cyril Chemparathy
2015-06-22 18:58 ` [dpdk-dev] [PATCH v2 11/12] tile: Add TILE-Gx mPIPE poll mode driver Cyril Chemparathy
2015-06-22 18:58 ` [dpdk-dev] [PATCH v2 12/12] maintainers: claim responsibility for TILE-Gx platform Cyril Chemparathy
2015-06-24 16:42 ` [dpdk-dev] [PATCH v2 00/12] Introducing the " Cyril Chemparathy

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