mm/microblaze: use common help functions to free reserved pages

Use common help functions to free reserved pages.
Signed-off-by: NJiang Liu <jiang.liu@huawei.com>
Cc: Michal Simek <monstr@monstr.eu>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

arch/microblaze/include/asm/setup.h

@@ -46,7 +46,6 @@ void machine_shutdown(void);
 void machine_halt(void);
 void machine_power_off(void);
 
-void free_init_pages(char *what, unsigned long begin, unsigned long end);
 extern void *alloc_maybe_bootmem(size_t size, gfp_t mask);
 extern void *zalloc_maybe_bootmem(size_t size, gfp_t mask);
 

arch/microblaze/mm/init.c

@@ -236,40 +236,16 @@ void __init setup_memory(void)
 	paging_init();
 }
 
-void free_init_pages(char *what, unsigned long begin, unsigned long end)
-{
-	unsigned long addr;
-
-	for (addr = begin; addr < end; addr += PAGE_SIZE) {
-		ClearPageReserved(virt_to_page(addr));
-		init_page_count(virt_to_page(addr));
-		free_page(addr);
-		totalram_pages++;
-	}
-	pr_info("Freeing %s: %ldk freed\n", what, (end - begin) >> 10);
-}
-
 #ifdef CONFIG_BLK_DEV_INITRD
 void free_initrd_mem(unsigned long start, unsigned long end)
 {
-	int pages = 0;
-	for (; start < end; start += PAGE_SIZE) {
-		ClearPageReserved(virt_to_page(start));
-		init_page_count(virt_to_page(start));
-		free_page(start);
-		totalram_pages++;
-		pages++;
-	}
-	pr_notice("Freeing initrd memory: %dk freed\n",
-					(int)(pages * (PAGE_SIZE / 1024)));
+	free_reserved_area(start, end, 0, "initrd");
 }
 #endif
 
 void free_initmem(void)
 {
-	free_init_pages("unused kernel memory",
-			(unsigned long)(&__init_begin),
-			(unsigned long)(&__init_end));
+	free_initmem_default(0);
 }
 
 void __init mem_init(void)