ARM: 9314/1: tcm: move tcm_init() prototype to asm/tcm.h

The function definition is in a file that does not include the
header with the declaration:

arch/arm/kernel/tcm.c:256:13: error: no previous prototype for 'tcm_init'

Move the declaration to a global header where it can actually be
included.

Fixes: de40614 ("ARM: 7694/1: ARM, TCM: initialize TCM in paging_init(), instead of setup_arch()")
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>

Author: arndb

arch/arm/include/asm/tcm.h

@@ -9,9 +9,7 @@
 #ifndef __ASMARM_TCM_H
 #define __ASMARM_TCM_H
 
-#ifndef CONFIG_HAVE_TCM
-#error "You should not be including tcm.h unless you have a TCM!"
-#endif
+#ifdef CONFIG_HAVE_TCM
 
 #include <linux/compiler.h>
 
@@ -29,4 +27,11 @@ void tcm_free(void *addr, size_t len);
 bool tcm_dtcm_present(void);
 bool tcm_itcm_present(void);
 
+void __init tcm_init(void);
+#else
+/* No TCM support, just blank inlines to be optimized out */
+static inline void tcm_init(void)
+{
+}
+#endif
 #endif

arch/arm/mm/mmu.c

@@ -21,6 +21,7 @@
 #include <asm/sections.h>
 #include <asm/setup.h>
 #include <asm/smp_plat.h>
+#include <asm/tcm.h>
 #include <asm/tlb.h>
 #include <asm/highmem.h>
 #include <asm/system_info.h>
@@ -37,7 +38,6 @@
 
 #include "fault.h"
 #include "mm.h"
-#include "tcm.h"
 
 extern unsigned long __atags_pointer;