CRIS: Update init memory handling

- Add free_initrd_mem as found by Guenter Roeck <linux@roeck-us.net>
- Add free_init_pages
- Export empty_zero_page symbol

Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>

diff --git a/arch/cris/mm/init.c b/arch/cris/mm/init.c
index c81af5bd916792791ea05baf006270cf459fb26a..1e7fd45b60f82af0beefb2c609151a3879a2b6a7 100644 (file)
--- a/arch/cris/mm/init.c
+++ b/arch/cris/mm/init.c
@@ -11,13 +11,15 @@
 #include <linux/gfp.h>
 #include <linux/init.h>
 #include <linux/bootmem.h>
+#include <linux/proc_fs.h>
+#include <linux/kcore.h>
 #include <asm/tlb.h>
 #include <asm/sections.h>
 
 unsigned long empty_zero_page;
+EXPORT_SYMBOL(empty_zero_page);
 
-void __init
-mem_init(void)
+void __init mem_init(void)
 {
        BUG_ON(!mem_map);
 
@@ -31,10 +33,36 @@ mem_init(void)
        mem_init_print_info(NULL);
 }
 
-/* free the pages occupied by initialization code */
+/* Free a range of init pages. Virtual addresses. */
 
-void 
-free_initmem(void)
+void free_init_pages(const 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++;
+       }
+
+       printk(KERN_INFO "Freeing %s: %ldk freed\n", what, (end - begin) >> 10);
+}
+
+/* Free the pages occupied by initialization code. */
+
+void free_initmem(void)
 {
        free_initmem_default(-1);
 }
+
+/* Free the pages occupied by initrd code. */
+
+#ifdef CONFIG_BLK_DEV_INITRD
+void free_initrd_mem(unsigned long start, unsigned long end)
+{
+       free_init_pages("initrd memory",
+                       start,
+                       end);
+}
+#endif