Pull mca-cleanup into release branch

[pandora-kernel.git] / init / initramfs.c

diff --git a/init/initramfs.c b/init/initramfs.c
index 0c5d9a3..637344b 100644 (file)
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -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;
 }