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authorJesper Nilsson <jespern@axis.com>2014-10-07 13:03:17 +0200
committerJesper Nilsson <jespern@axis.com>2014-12-20 00:04:52 +0100
commit80d6170a289a1201480242d3570c5d7606ea1de9 (patch)
treeb68b2a96d57a5de52269c069f1276c22d0e5e300 /arch/cris/mm
parentd6517c4c192b04016e2fbf12322bc6bd00f23835 (diff)
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>
Diffstat (limited to 'arch/cris/mm')
-rw-r--r--arch/cris/mm/init.c38
1 files changed, 33 insertions, 5 deletions
diff --git a/arch/cris/mm/init.c b/arch/cris/mm/init.c
index c81af5bd9167..1e7fd45b60f8 100644
--- 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