From bfee76a88bcadc6fd7007580aa49f27a8cacf622 Mon Sep 17 00:00:00 2001
From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Thu, 9 Jan 2025 11:08:23 -0500
Subject: [PATCH] compiler.h: Remove caa_unqual_scalar_typeof

commit dd8987a4052e ("Revert "compiler.h: Introduce caa_unqual_scalar_typeof"")
removed caa_unqual_scalar_typeof because it uses _Generic, which
requires C11, but liburcu supports C99.

caa_unqual_scalar_typeof was re-introduced by commit d18544842bdf
("Add CMM memory model"), even though it is unused within liburcu.

Remove it again.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I7713504433d142aee1bb1a39492843cd73b37fc2
---
 include/urcu/compiler.h | 26 --------------------------
 1 file changed, 26 deletions(-)

diff --git a/include/urcu/compiler.h b/include/urcu/compiler.h
index e027c130..2868186e 100644
--- a/include/urcu/compiler.h
+++ b/include/urcu/compiler.h
@@ -151,32 +151,6 @@
 				+ __GNUC_PATCHLEVEL__)
 #endif
 
-#ifdef __cplusplus
-#define caa_unqual_scalar_typeof(x)					\
-	std::remove_cv<std::remove_reference<decltype(x)>::type>::type
-#else
-#define caa_scalar_type_to_expr(type)					\
-	unsigned type: (unsigned type)0,				\
-	signed type: (signed type)0
-
-/*
- * Use C11 _Generic to express unqualified type from expression. This removes
- * volatile qualifier from expression type.
- */
-#define caa_unqual_scalar_typeof(x)					\
-	__typeof__(							\
-		_Generic((x),						\
-			char: (char)0,					\
-			caa_scalar_type_to_expr(char),			\
-			caa_scalar_type_to_expr(short),		\
-			caa_scalar_type_to_expr(int),			\
-			caa_scalar_type_to_expr(long),			\
-			caa_scalar_type_to_expr(long long),		\
-			default: (x)					\
-		)							\
-	)
-#endif
-
 /*
  * Allow user to manually define CMM_SANITIZE_THREAD if their toolchain is not
  * supported by this check.