powerpc: Move free_initmem to common code

The free_initmem function is basically duplicated in mm/init_32,
and init_64, and is moved to the common 32/64-bit mm/mem.c.

All other sections except init were removed in v2.6.15 by
6c45ab99 (powerpc: Remove section
free() and linker script bits), and therefore the bulk of the executed
code is identical.

This patch also removes updating ppc_md.progress to NULL in the powermac
late_initcall.
Suggested-by: Milton Miller <miltonm@bga.com>
Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Dave Carroll <dcarroll@astekcorp.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/mm/init_32.c

@@ -191,38 +191,6 @@ void __init *early_get_page(void)
 		return __va(memblock_alloc(PAGE_SIZE, PAGE_SIZE));
 }
 
-/* Free up now-unused memory */
-static void free_sec(unsigned long start, unsigned long end, const char *name)
-{
-	unsigned long cnt = 0;
-
-	while (start < end) {
-		ClearPageReserved(virt_to_page(start));
-		init_page_count(virt_to_page(start));
-		free_page(start);
-		cnt++;
-		start += PAGE_SIZE;
- 	}
-	if (cnt) {
-		printk(" %ldk %s", cnt << (PAGE_SHIFT - 10), name);
-		totalram_pages += cnt;
-	}
-}
-
-void free_initmem(void)
-{
-#define FREESEC(TYPE) \
-	free_sec((unsigned long)(&__ ## TYPE ## _begin), \
-		 (unsigned long)(&__ ## TYPE ## _end), \
-		 #TYPE);
-
-	printk ("Freeing unused kernel memory:");
-	FREESEC(init);
- 	printk("\n");
-	ppc_md.progress = NULL;
-#undef FREESEC
-}
-
 #ifdef CONFIG_8xx /* No 8xx specific .c file to put that in ... */
 void setup_initial_memory_limit(phys_addr_t first_memblock_base,
 				phys_addr_t first_memblock_size)

arch/powerpc/mm/init_64.c

@@ -83,22 +83,6 @@ EXPORT_SYMBOL_GPL(memstart_addr);
 phys_addr_t kernstart_addr;
 EXPORT_SYMBOL_GPL(kernstart_addr);
 
-void free_initmem(void)
-{
-	unsigned long addr;
-
-	addr = (unsigned long)__init_begin;
-	for (; addr < (unsigned long)__init_end; addr += PAGE_SIZE) {
-		memset((void *)addr, POISON_FREE_INITMEM, PAGE_SIZE);
-		ClearPageReserved(virt_to_page(addr));
-		init_page_count(virt_to_page(addr));
-		free_page(addr);
-		totalram_pages++;
-	}
-	printk ("Freeing unused kernel memory: %luk freed\n",
-		((unsigned long)__init_end - (unsigned long)__init_begin) >> 10);
-}
-
 static void pgd_ctor(void *addr)
 {
 	memset(addr, 0, PGD_TABLE_SIZE);

arch/powerpc/mm/mem.c

@@ -383,6 +383,25 @@ void __init mem_init(void)
 	mem_init_done = 1;
 }
 
+void free_initmem(void)
+{
+	unsigned long addr;
+
+	ppc_md.progress = NULL;
+
+	addr = (unsigned long)__init_begin;
+	for (; addr < (unsigned long)__init_end; addr += PAGE_SIZE) {
+		memset((void *)addr, POISON_FREE_INITMEM, PAGE_SIZE);
+		ClearPageReserved(virt_to_page(addr));
+		init_page_count(virt_to_page(addr));
+		free_page(addr);
+		totalram_pages++;
+	}
+	pr_info("Freeing unused kernel memory: %luk freed\n",
+		((unsigned long)__init_end -
+		(unsigned long)__init_begin) >> 10);
+}
+
 #ifdef CONFIG_BLK_DEV_INITRD
 void __init free_initrd_mem(unsigned long start, unsigned long end)
 {

arch/powerpc/platforms/powermac/setup.c

@@ -355,9 +355,6 @@ static int initializing = 1;
 static int pmac_late_init(void)
 {
 	initializing = 0;
-	/* this is udbg (which is __init) and we can later use it during
-	 * cpu hotplug (in smp_core99_kick_cpu) */
-	ppc_md.progress = NULL;
 	return 0;
 }
 machine_late_initcall(powermac, pmac_late_init);