eal: replace page sizes enum with a set of constants

Clang on Windows follows MS ABI where enum values are limited to 2^31-1.
Enum rte_page_sizes has members valued above this limit, which get
wrapped to zero, resulting in compilation error (duplicate values in
enum). Using MS ABI is mandatory for Windows EAL to call Win32 APIs.

Remove rte_page_sizes and replace its values with #define's.
This enumeration is not used in public API, so there's no ABI breakage.
Announce API changes for 20.08 in documentation.

Suggested-by: Jerin Jacob <jerinjacobk@gmail.com>
Signed-off-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>

diff --git a/doc/guides/rel_notes/release_20_08.rst b/doc/guides/rel_notes/release_20_08.rst
index dee4ccb..86d2402 100644 (file)
--- a/doc/guides/rel_notes/release_20_08.rst
+++ b/doc/guides/rel_notes/release_20_08.rst
@@ -91,6 +91,8 @@ API Changes
    Also, make sure to start the actual text at the margin.
    =========================================================
 
+* ``rte_page_sizes`` enumeration is replaced with ``RTE_PGSIZE_xxx`` defines.
+
 
 ABI Changes
 -----------

diff --git a/lib/librte_eal/include/rte_memory.h b/lib/librte_eal/include/rte_memory.h
index 3d8d0bd..65374d5 100644 (file)
--- a/lib/librte_eal/include/rte_memory.h
+++ b/lib/librte_eal/include/rte_memory.h
@@ -24,19 +24,16 @@ extern "C" {
 #include <rte_config.h>
 #include <rte_fbarray.h>
 
-__extension__
-enum rte_page_sizes {
-       RTE_PGSIZE_4K    = 1ULL << 12,
-       RTE_PGSIZE_64K   = 1ULL << 16,
-       RTE_PGSIZE_256K  = 1ULL << 18,
-       RTE_PGSIZE_2M    = 1ULL << 21,
-       RTE_PGSIZE_16M   = 1ULL << 24,
-       RTE_PGSIZE_256M  = 1ULL << 28,
-       RTE_PGSIZE_512M  = 1ULL << 29,
-       RTE_PGSIZE_1G    = 1ULL << 30,
-       RTE_PGSIZE_4G    = 1ULL << 32,
-       RTE_PGSIZE_16G   = 1ULL << 34,
-};
+#define RTE_PGSIZE_4K   (1ULL << 12)
+#define RTE_PGSIZE_64K  (1ULL << 16)
+#define RTE_PGSIZE_256K (1ULL << 18)
+#define RTE_PGSIZE_2M   (1ULL << 21)
+#define RTE_PGSIZE_16M  (1ULL << 24)
+#define RTE_PGSIZE_256M (1ULL << 28)
+#define RTE_PGSIZE_512M (1ULL << 29)
+#define RTE_PGSIZE_1G   (1ULL << 30)
+#define RTE_PGSIZE_4G   (1ULL << 32)
+#define RTE_PGSIZE_16G  (1ULL << 34)
 
 #define SOCKET_ID_ANY -1                    /**< Any NUMA socket. */