[ARM] move initrd code from kernel/setup.c to mm/init.c

This quietens some sparse warnings about phys_initrd_start and
phys_initrd_size.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/kernel/setup.c

@@ -113,9 +113,6 @@ static struct stack stacks[NR_CPUS];
 char elf_platform[ELF_PLATFORM_SIZE];
 EXPORT_SYMBOL(elf_platform);
 
-unsigned long phys_initrd_start __initdata = 0;
-unsigned long phys_initrd_size __initdata = 0;
-
 static struct meminfo meminfo __initdata = { 0, };
 static const char *cpu_name;
 static const char *machine_name;
@@ -445,20 +442,6 @@ static struct machine_desc * __init setup_machine(unsigned int nr)
 	return list;
 }
 
-static void __init early_initrd(char **p)
-{
-	unsigned long start, size;
-
-	start = memparse(*p, p);
-	if (**p == ',') {
-		size = memparse((*p) + 1, p);
-
-		phys_initrd_start = start;
-		phys_initrd_size = size;
-	}
-}
-__early_param("initrd=", early_initrd);
-
 static void __init arm_add_memory(unsigned long start, unsigned long size)
 {
 	struct membank *bank;
@@ -696,26 +679,6 @@ static int __init parse_tag_ramdisk(const struct tag *tag)
 
 __tagtable(ATAG_RAMDISK, parse_tag_ramdisk);
 
-static int __init parse_tag_initrd(const struct tag *tag)
-{
-	printk(KERN_WARNING "ATAG_INITRD is deprecated; "
-		"please update your bootloader.\n");
-	phys_initrd_start = __virt_to_phys(tag->u.initrd.start);
-	phys_initrd_size = tag->u.initrd.size;
-	return 0;
-}
-
-__tagtable(ATAG_INITRD, parse_tag_initrd);
-
-static int __init parse_tag_initrd2(const struct tag *tag)
-{
-	phys_initrd_start = tag->u.initrd.start;
-	phys_initrd_size = tag->u.initrd.size;
-	return 0;
-}
-
-__tagtable(ATAG_INITRD2, parse_tag_initrd2);
-
 static int __init parse_tag_serialnr(const struct tag *tag)
 {
 	system_serial_low = tag->u.serialnr.low;

arch/arm/mm/init.c

@@ -27,8 +27,43 @@
 #include "mm.h"
 
 extern void _text, _etext, __data_start, _end, __init_begin, __init_end;
-extern unsigned long phys_initrd_start;
-extern unsigned long phys_initrd_size;
+
+static unsigned long phys_initrd_start __initdata = 0;
+static unsigned long phys_initrd_size __initdata = 0;
+
+static void __init early_initrd(char **p)
+{
+	unsigned long start, size;
+
+	start = memparse(*p, p);
+	if (**p == ',') {
+		size = memparse((*p) + 1, p);
+
+		phys_initrd_start = start;
+		phys_initrd_size = size;
+	}
+}
+__early_param("initrd=", early_initrd);
+
+static int __init parse_tag_initrd(const struct tag *tag)
+{
+	printk(KERN_WARNING "ATAG_INITRD is deprecated; "
+		"please update your bootloader.\n");
+	phys_initrd_start = __virt_to_phys(tag->u.initrd.start);
+	phys_initrd_size = tag->u.initrd.size;
+	return 0;
+}
+
+__tagtable(ATAG_INITRD, parse_tag_initrd);
+
+static int __init parse_tag_initrd2(const struct tag *tag)
+{
+	phys_initrd_start = tag->u.initrd.start;
+	phys_initrd_size = tag->u.initrd.size;
+	return 0;
+}
+
+__tagtable(ATAG_INITRD2, parse_tag_initrd2);
 
 /*
  * This is used to pass memory configuration data from paging_init