[PATCH v3 3/3] eal: remove typeof from per lcore macros

[Tyler Retzlaff]

The design of the macros requires a type to be provided to the macro.

By expanding the type parameter inside of typeof it also inadvertently
allows an expression to be used which appears not to have been intended
after evaluating the parameter name and existing macro use.

Technically this is an API break but only for applications that were
using these macros outside of the original design intent.

Signed-off-by: Tyler Retzlaff <roretzla at linux.microsoft.com>
Acked-by: Bruce Richardson <bruce.richardson at intel.com>
---
 doc/guides/rel_notes/release_24_03.rst | 5 +++++
 lib/eal/include/rte_per_lcore.h        | 8 ++++----
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/doc/guides/rel_notes/release_24_03.rst b/doc/guides/rel_notes/release_24_03.rst
index 6741947..39088da 100644
--- a/doc/guides/rel_notes/release_24_03.rst
+++ b/doc/guides/rel_notes/release_24_03.rst
@@ -89,6 +89,11 @@ API Changes
    Also, make sure to start the actual text at the margin.
    =======================================================
 
+* eal: Removed ``typeof(type)`` from the expansion of ``RTE_DEFINE_PER_LCORE``
+  and ``RTE_DECLARE_PER_LCORE`` macros aligning them with their intended design.
+  If use with an expression is desired applications can adapt by supplying
+  ``typeof(e)`` as an argument.
+
 * gso: ``rte_gso_segment`` now returns -ENOTSUP for unknown protocols.
 
 
diff --git a/lib/eal/include/rte_per_lcore.h b/lib/eal/include/rte_per_lcore.h
index 41fe1f0..529995e 100644
--- a/lib/eal/include/rte_per_lcore.h
+++ b/lib/eal/include/rte_per_lcore.h
@@ -24,10 +24,10 @@
 
 #ifdef RTE_TOOLCHAIN_MSVC
 #define RTE_DEFINE_PER_LCORE(type, name)			\
-	__declspec(thread) typeof(type) per_lcore_##name
+	__declspec(thread) type per_lcore_##name
 
 #define RTE_DECLARE_PER_LCORE(type, name)			\
-	extern __declspec(thread) typeof(type) per_lcore_##name
+	extern __declspec(thread) type per_lcore_##name
 #else
 /**
  * Macro to define a per lcore variable "var" of type "type", don't
@@ -35,13 +35,13 @@
  * whole macro.
  */
 #define RTE_DEFINE_PER_LCORE(type, name)			\
-	__thread __typeof__(type) per_lcore_##name
+	__thread type per_lcore_##name
 
 /**
  * Macro to declare an extern per lcore variable "var" of type "type"
  */
 #define RTE_DECLARE_PER_LCORE(type, name)			\
-	extern __thread __typeof__(type) per_lcore_##name
+	extern __thread type per_lcore_##name
 #endif
 
 /**
-- 
1.8.3.1