powerpc: Support for relocatable kdump kernel

[linux-2.6-omap-h63xx.git] / arch / powerpc / kernel / machine_kexec.c

diff --git a/arch/powerpc/kernel/machine_kexec.c b/arch/powerpc/kernel/machine_kexec.c
index 2d202f274e7384722a0584a224b415420ee5ed11..ac2a21f45c757a41f8ab639abca5a449d6576207 100644 (file)
--- a/arch/powerpc/kernel/machine_kexec.c
+++ b/arch/powerpc/kernel/machine_kexec.c
@@ -48,7 +48,7 @@ void machine_kexec_cleanup(struct kimage *image)
  * Do not allocate memory (or fail in any way) in machine_kexec().
  * We are past the point of no return, committed to rebooting now.
  */
-NORET_TYPE void machine_kexec(struct kimage *image)
+void machine_kexec(struct kimage *image)
 {
        if (ppc_md.machine_kexec)
                ppc_md.machine_kexec(image);
@@ -74,25 +74,27 @@ void __init reserve_crashkernel(void)
        ret = parse_crashkernel(boot_command_line, lmb_phys_mem_size(),
                        &crash_size, &crash_base);
        if (ret == 0 && crash_size > 0) {
-               if (crash_base == 0)
-                       crash_base = KDUMP_KERNELBASE;
                crashk_res.start = crash_base;
-       } else {
-               /* handle the device tree */
-               crash_size = crashk_res.end - crashk_res.start + 1;
+               crashk_res.end = crash_base + crash_size - 1;
        }
 
-       if (crash_size == 0)
+       if (crashk_res.end == crashk_res.start) {
+               crashk_res.start = crashk_res.end = 0;
                return;
+       }
 
        /* We might have got these values via the command line or the
         * device tree, either way sanitise them now. */
 
+       crash_size = crashk_res.end - crashk_res.start + 1;
+
+#ifndef CONFIG_RELOCATABLE
        if (crashk_res.start != KDUMP_KERNELBASE)
                printk("Crash kernel location must be 0x%x\n",
                                KDUMP_KERNELBASE);
 
        crashk_res.start = KDUMP_KERNELBASE;
+#endif
        crash_size = PAGE_ALIGN(crash_size);
        crashk_res.end = crashk_res.start + crash_size - 1;