runtime constants: move list of constants to vmlinux.lds.h

Refactor the list of constant variables into a macro.
This should make it easier to add more constants in the future.

Signed-off-by: Jann Horn <jannh@google.com>
Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm64/kernel/vmlinux.lds.S

@@ -264,8 +264,7 @@ SECTIONS
 		EXIT_DATA
 	}
 
-	RUNTIME_CONST(shift, d_hash_shift)
-	RUNTIME_CONST(ptr, dentry_hashtable)
+	RUNTIME_CONST_VARIABLES
 
 	PERCPU_SECTION(L1_CACHE_BYTES)
 	HYPERVISOR_PERCPU_SECTION

arch/s390/kernel/vmlinux.lds.S

@@ -191,8 +191,7 @@ SECTIONS
 	. = ALIGN(PAGE_SIZE);
 	INIT_DATA_SECTION(0x100)
 
-	RUNTIME_CONST(shift, d_hash_shift)
-	RUNTIME_CONST(ptr, dentry_hashtable)
+	RUNTIME_CONST_VARIABLES
 
 	PERCPU_SECTION(0x100)
 

arch/x86/kernel/vmlinux.lds.S

@@ -357,8 +357,7 @@ SECTIONS
 	PERCPU_SECTION(INTERNODE_CACHE_BYTES)
 #endif
 
-	RUNTIME_CONST(shift, d_hash_shift)
-	RUNTIME_CONST(ptr, dentry_hashtable)
+	RUNTIME_CONST_VARIABLES
 
 	. = ALIGN(PAGE_SIZE);
 

include/asm-generic/vmlinux.lds.h

@@ -918,6 +918,10 @@
 
 #define RUNTIME_CONST(t,x) NAMED_SECTION(runtime_##t##_##x)
 
+#define RUNTIME_CONST_VARIABLES						\
+		RUNTIME_CONST(shift, d_hash_shift)			\
+		RUNTIME_CONST(ptr, dentry_hashtable)
+
 /* Alignment must be consistent with (kunit_suite *) in include/kunit/test.h */
 #define KUNIT_TABLE()							\
 		. = ALIGN(8);						\