eal: add packing and alignment macros

Adding a new macro for specifying __aligned__ attribute, and updating the
current __rte_cache_aligned macro to use it.

Also adding a new macro to specify the __packed__ attribute

Signed-off-by: Declan Doherty <declan.doherty@intel.com>
Acked-by: Sergio Gonzalez Monroy <sergio.gonzalez.monroy@intel.com>

diff --git a/lib/librte_eal/common/include/rte_common.h b/lib/librte_eal/common/include/rte_common.h
index f8ca6f3..b58a384 100644 (file)
--- a/lib/librte_eal/common/include/rte_common.h
+++ b/lib/librte_eal/common/include/rte_common.h
@@ -69,6 +69,16 @@ typedef uint32_t unaligned_uint32_t;
 typedef uint16_t unaligned_uint16_t;
 #endif
 
+/**
+ * Force alignment
+ */
+#define __rte_aligned(a) __attribute__((__aligned__(a)))
+
+/**
+ * Force a structure to be packed
+ */
+#define __rte_packed __attribute__((__packed__))
+
 /******* Macro to mark functions and fields scheduled for removal *****/
 #define __rte_deprecated       __attribute__((__deprecated__))
 

diff --git a/lib/librte_eal/common/include/rte_memory.h b/lib/librte_eal/common/include/rte_memory.h
index 067be10..33f5a77 100644 (file)
--- a/lib/librte_eal/common/include/rte_memory.h
+++ b/lib/librte_eal/common/include/rte_memory.h
@@ -80,7 +80,7 @@ enum rte_page_sizes {
 /**
  * Force alignment to cache line.
  */
-#define __rte_cache_aligned __attribute__((__aligned__(RTE_CACHE_LINE_SIZE)))
+#define __rte_cache_aligned __rte_aligned(RTE_CACHE_LINE_SIZE)
 
 typedef uint64_t phys_addr_t; /**< Physical address definition. */
 #define RTE_BAD_PHYS_ADDR ((phys_addr_t)-1)
@@ -106,7 +106,7 @@ struct rte_memseg {
         /**< store segment MFNs */
        uint64_t mfn[DOM0_NUM_MEMBLOCK];
 #endif
-} __attribute__((__packed__));
+} __rte_packed;
 
 /**
  * Lock page in physical memory and prevent from swapping.