[PATCH] md: Final stages of raid5 expand code
[linux-2.6.git] / init / initramfs.c
index 0c5d9a3f951baea7efa88f37683641e7efc3a978..679d870d991b760438a95d133c9684b9f381eb0d 100644 (file)
@@ -466,10 +466,32 @@ static char * __init unpack_to_rootfs(char *buf, unsigned len, int check_only)
 extern char __initramfs_start[], __initramfs_end[];
 #ifdef CONFIG_BLK_DEV_INITRD
 #include <linux/initrd.h>
+#include <linux/kexec.h>
 
 static void __init free_initrd(void)
 {
-       free_initrd_mem(initrd_start, initrd_end);
+#ifdef CONFIG_KEXEC
+       unsigned long crashk_start = (unsigned long)__va(crashk_res.start);
+       unsigned long crashk_end   = (unsigned long)__va(crashk_res.end);
+
+       /*
+        * If the initrd region is overlapped with crashkernel reserved region,
+        * free only memory that is not part of crashkernel region.
+        */
+       if (initrd_start < crashk_end && initrd_end > crashk_start) {
+               /*
+                * Initialize initrd memory region since the kexec boot does
+                * not do.
+                */
+               memset((void *)initrd_start, 0, initrd_end - initrd_start);
+               if (initrd_start < crashk_start)
+                       free_initrd_mem(initrd_start, crashk_start);
+               if (initrd_end > crashk_end)
+                       free_initrd_mem(crashk_end, initrd_end);
+       } else
+#endif
+               free_initrd_mem(initrd_start, initrd_end);
+
        initrd_start = 0;
        initrd_end = 0;
 }
@@ -484,6 +506,7 @@ void __init populate_rootfs(void)
                panic(err);
 #ifdef CONFIG_BLK_DEV_INITRD
        if (initrd_start) {
+#ifdef CONFIG_BLK_DEV_RAM
                int fd;
                printk(KERN_INFO "checking if image is initramfs...");
                err = unpack_to_rootfs((char *)initrd_start,
@@ -496,13 +519,22 @@ void __init populate_rootfs(void)
                        return;
                }
                printk("it isn't (%s); looks like an initrd\n", err);
-               fd = sys_open("/initrd.image", O_WRONLY|O_CREAT, 700);
+               fd = sys_open("/initrd.image", O_WRONLY|O_CREAT, 0700);
                if (fd >= 0) {
                        sys_write(fd, (char *)initrd_start,
                                        initrd_end - initrd_start);
                        sys_close(fd);
                        free_initrd();
                }
+#else
+               printk(KERN_INFO "Unpacking initramfs...");
+               err = unpack_to_rootfs((char *)initrd_start,
+                       initrd_end - initrd_start, 0);
+               if (err)
+                       panic(err);
+               printk(" done\n");
+               free_initrd();
+#endif
        }
 #endif
 }