diff --git a/arch/x86/include/asm/rmwcc.h b/arch/x86/include/asm/rmwcc.h
index 7fa611216417..4b081e0d3306 100644
--- a/arch/x86/include/asm/rmwcc.h
+++ b/arch/x86/include/asm/rmwcc.h
@@ -2,12 +2,7 @@
 #ifndef _ASM_X86_RMWcc
 #define _ASM_X86_RMWcc
 
-/* This counts to 12. Any more, it will return 13th argument. */
-#define __RMWcc_ARGS(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _n, X...) _n
-#define RMWcc_ARGS(X...) __RMWcc_ARGS(, ##X, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
-
-#define __RMWcc_CONCAT(a, b) a ## b
-#define RMWcc_CONCAT(a, b) __RMWcc_CONCAT(a, b)
+#include <linux/args.h>
 
 #define __CLOBBERS_MEM(clb...)	"memory", ## clb
 
@@ -48,7 +43,7 @@ cc_label:	c = true;						\
 #define GEN_UNARY_RMWcc_3(op, var, cc)					\
 	GEN_UNARY_RMWcc_4(op, var, cc, "%[var]")
 
-#define GEN_UNARY_RMWcc(X...) RMWcc_CONCAT(GEN_UNARY_RMWcc_, RMWcc_ARGS(X))(X)
+#define GEN_UNARY_RMWcc(X...)	CONCATENATE(GEN_UNARY_RMWcc_, COUNT_ARGS(X))(X)
 
 #define GEN_BINARY_RMWcc_6(op, var, cc, vcon, _val, arg0)		\
 	__GEN_RMWcc(op " %[val], " arg0, var, cc,			\
@@ -57,7 +52,7 @@ cc_label:	c = true;						\
 #define GEN_BINARY_RMWcc_5(op, var, cc, vcon, val)			\
 	GEN_BINARY_RMWcc_6(op, var, cc, vcon, val, "%[var]")
 
-#define GEN_BINARY_RMWcc(X...) RMWcc_CONCAT(GEN_BINARY_RMWcc_, RMWcc_ARGS(X))(X)
+#define GEN_BINARY_RMWcc(X...)	CONCATENATE(GEN_BINARY_RMWcc_, COUNT_ARGS(X))(X)
 
 #define GEN_UNARY_SUFFIXED_RMWcc(op, suffix, var, cc, clobbers...)	\
 	__GEN_RMWcc(op " %[var]\n\t" suffix, var, cc,			\
diff --git a/include/kunit/test.h b/include/kunit/test.h
index 23120d50499e..107c81431634 100644
--- a/include/kunit/test.h
+++ b/include/kunit/test.h
@@ -12,6 +12,7 @@
 #include <kunit/assert.h>
 #include <kunit/try-catch.h>
 
+#include <linux/args.h>
 #include <linux/compiler.h>
 #include <linux/container_of.h>
 #include <linux/err.h>
diff --git a/include/linux/args.h b/include/linux/args.h
new file mode 100644
index 000000000000..8ff60a54eb7d
--- /dev/null
+++ b/include/linux/args.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef _LINUX_ARGS_H
+#define _LINUX_ARGS_H
+
+/*
+ * How do these macros work?
+ *
+ * In __COUNT_ARGS() _0 to _12 are just placeholders from the start
+ * in order to make sure _n is positioned over the correct number
+ * from 12 to 0 (depending on X, which is a variadic argument list).
+ * They serve no purpose other than occupying a position. Since each
+ * macro parameter must have a distinct identifier, those identifiers
+ * are as good as any.
+ *
+ * In COUNT_ARGS() we use actual integers, so __COUNT_ARGS() returns
+ * that as _n.
+ */
+
+/* This counts to 12. Any more, it will return 13th argument. */
+#define __COUNT_ARGS(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _n, X...) _n
+#define COUNT_ARGS(X...) __COUNT_ARGS(, ##X, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
+
+/* Concatenate two parameters, but allow them to be expanded beforehand. */
+#define __CONCAT(a, b) a ## b
+#define CONCATENATE(a, b) __CONCAT(a, b)
+
+#endif	/* _LINUX_ARGS_H */
diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h
index f196c19f8e55..2865b14c2bba 100644
--- a/include/linux/arm-smccc.h
+++ b/include/linux/arm-smccc.h
@@ -5,6 +5,7 @@
 #ifndef __LINUX_ARM_SMCCC_H
 #define __LINUX_ARM_SMCCC_H
 
+#include <linux/args.h>
 #include <linux/init.h>
 #include <uapi/linux/const.h>
 
@@ -413,11 +414,6 @@ asmlinkage void __arm_smccc_hvc(unsigned long a0, unsigned long a1,
 
 #endif
 
-#define ___count_args(_0, _1, _2, _3, _4, _5, _6, _7, _8, x, ...) x
-
-#define __count_args(...)						\
-	___count_args(__VA_ARGS__, 7, 6, 5, 4, 3, 2, 1, 0)
-
 #define __constraint_read_0	"r" (arg0)
 #define __constraint_read_1	__constraint_read_0, "r" (arg1)
 #define __constraint_read_2	__constraint_read_1, "r" (arg2)
@@ -475,14 +471,6 @@ asmlinkage void __arm_smccc_hvc(unsigned long a0, unsigned long a1,
 	__declare_arg_6(a0, a1, a2, a3, a4, a5, a6, res);		\
 	register typeof(a7) arg7 asm("r7") = __a7
 
-#define ___declare_args(count, ...) __declare_arg_ ## count(__VA_ARGS__)
-#define __declare_args(count, ...)  ___declare_args(count, __VA_ARGS__)
-
-#define ___constraints(count)						\
-	: __constraint_read_ ## count					\
-	: smccc_sve_clobbers "memory"
-#define __constraints(count)	___constraints(count)
-
 /*
  * We have an output list that is not necessarily used, and GCC feels
  * entitled to optimise the whole sequence away. "volatile" is what
@@ -494,11 +482,13 @@ asmlinkage void __arm_smccc_hvc(unsigned long a0, unsigned long a1,
 		register unsigned long r1 asm("r1");			\
 		register unsigned long r2 asm("r2");			\
 		register unsigned long r3 asm("r3"); 			\
-		__declare_args(__count_args(__VA_ARGS__), __VA_ARGS__);	\
+		CONCATENATE(__declare_arg_, COUNT_ARGS(__VA_ARGS__));	\
 		asm volatile(SMCCC_SVE_CHECK				\
 			     inst "\n" :				\
 			     "=r" (r0), "=r" (r1), "=r" (r2), "=r" (r3)	\
-			     __constraints(__count_args(__VA_ARGS__)));	\
+			     : CONCATENATE(__constraint_read_,		\
+					   COUNT_ARGS(__VA_ARGS__))	\
+			     : smccc_sve_clobbers "memory");		\
 		if (___res)						\
 			*___res = (typeof(*___res)){r0, r1, r2, r3};	\
 	} while (0)
@@ -542,8 +532,11 @@ asmlinkage void __arm_smccc_hvc(unsigned long a0, unsigned long a1,
  */
 #define __fail_smccc_1_1(...)						\
 	do {								\
-		__declare_args(__count_args(__VA_ARGS__), __VA_ARGS__);	\
-		asm ("" : __constraints(__count_args(__VA_ARGS__)));	\
+		CONCATENATE(__declare_arg_, COUNT_ARGS(__VA_ARGS__));	\
+		asm ("" :						\
+		     : CONCATENATE(__constraint_read_,			\
+				   COUNT_ARGS(__VA_ARGS__))		\
+		     : smccc_sve_clobbers "memory");			\
 		if (___res)						\
 			___res->a0 = SMCCC_RET_NOT_SUPPORTED;		\
 	} while (0)
diff --git a/include/linux/genl_magic_struct.h b/include/linux/genl_magic_struct.h
index f81d48987528..a419d93789ff 100644
--- a/include/linux/genl_magic_struct.h
+++ b/include/linux/genl_magic_struct.h
@@ -14,14 +14,12 @@
 # error "you need to define GENL_MAGIC_INCLUDE_FILE before inclusion"
 #endif
 
+#include <linux/args.h>
 #include <linux/genetlink.h>
 #include <linux/types.h>
 
-#define CONCAT__(a,b)	a ## b
-#define CONCAT_(a,b)	CONCAT__(a,b)
-
-extern int CONCAT_(GENL_MAGIC_FAMILY, _genl_register)(void);
-extern void CONCAT_(GENL_MAGIC_FAMILY, _genl_unregister)(void);
+extern int CONCATENATE(GENL_MAGIC_FAMILY, _genl_register)(void);
+extern void CONCATENATE(GENL_MAGIC_FAMILY, _genl_unregister)(void);
 
 /*
  * Extension of genl attribute validation policies			{{{2
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 0b00e1aef33d..15d9496db169 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -419,13 +419,6 @@ ftrace_vprintk(const char *fmt, va_list ap)
 static inline void ftrace_dump(enum ftrace_dump_mode oops_dump_mode) { }
 #endif /* CONFIG_TRACING */
 
-/* This counts to 12. Any more, it will return 13th argument. */
-#define __COUNT_ARGS(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _n, X...) _n
-#define COUNT_ARGS(X...) __COUNT_ARGS(, ##X, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
-
-#define __CONCAT(a, b) a ## b
-#define CONCATENATE(a, b) __CONCAT(a, b)
-
 /* Rebuild everything on CONFIG_FTRACE_MCOUNT_RECORD */
 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
 # define REBUILD_DUE_TO_FTRACE_MCOUNT_RECORD
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 0ff7500772e6..eeb2e6f6130f 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -23,7 +23,7 @@
 #ifndef LINUX_PCI_H
 #define LINUX_PCI_H
 
-
+#include <linux/args.h>
 #include <linux/mod_devicetable.h>
 
 #include <linux/types.h>
diff --git a/include/trace/bpf_probe.h b/include/trace/bpf_probe.h
index 1f7fc1fc590c..e609cd7da47e 100644
--- a/include/trace/bpf_probe.h
+++ b/include/trace/bpf_probe.h
@@ -12,6 +12,8 @@
 #undef __perf_task
 #define __perf_task(t)	(t)
 
+#include <linux/args.h>
+
 /* cast any integer, pointer, or small struct to u64 */
 #define UINTTYPE(size) \
 	__typeof__(__builtin_choose_expr(size == 1,  (u8)1, \
