From: Intel <intel.com>
Date: Wed, 19 Dec 2012 23:00:00 +0000 (+0100)
Subject: eal: always check CPU support at runtime
X-Git-Tag: spdx-start~11400
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=277ff5bb75b05480c3f42597a4c5019d51833fdf;p=dpdk.git

eal: always check CPU support at runtime

Signed-off-by: Intel
---

diff --git a/lib/librte_eal/common/eal_common_cpuflags.c b/lib/librte_eal/common/eal_common_cpuflags.c
index b3d03e5748..8312614b65 100644
--- a/lib/librte_eal/common/eal_common_cpuflags.c
+++ b/lib/librte_eal/common/eal_common_cpuflags.c
@@ -243,7 +243,10 @@ rte_cpu_get_flag_enabled(enum rte_cpu_flag_t feature)
  * with ICC, the check is generated by the compiler.
  */
 #ifndef __INTEL_COMPILER
-static void __attribute__ ((__constructor__))
+void __attribute__ ((__constructor__))
+#else
+void
+#endif
 rte_cpu_check_supported(void)
 {
 	/* This is generated at compile-time by the build system */
@@ -261,4 +264,3 @@ rte_cpu_check_supported(void)
 			exit(1);
 		}
 }
-#endif
diff --git a/lib/librte_eal/common/include/rte_cpuflags.h b/lib/librte_eal/common/include/rte_cpuflags.h
index cb22396437..abd48005fd 100644
--- a/lib/librte_eal/common/include/rte_cpuflags.h
+++ b/lib/librte_eal/common/include/rte_cpuflags.h
@@ -156,15 +156,23 @@ enum rte_cpu_flag_t {
  * Function for checking a CPU flag availability
  *
  * @param flag
- * 	CPU flag to query CPU for
+ *     CPU flag to query CPU for
  * @return
- *  1 if flag is available
- *  0 if flag is not available
- *  -ENOENT if flag is invalid
+ *     1 if flag is available
+ *     0 if flag is not available
+ *     -ENOENT if flag is invalid
  */
 int
 rte_cpu_get_flag_enabled(enum rte_cpu_flag_t flag);
 
+/**
+ * This function checks that the currently used CPU supports the CPU features
+ * that were specified at compile time. It is called automatically within the
+ * EAL, so does not need to be used by applications.
+ */
+void
+rte_cpu_check_supported(void);
+
 #ifdef __cplusplus
 }
 #endif