X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=kernel%2Fkexec.c;h=58f0f382597cf4416e475c63c2fa3736462de7f2;hb=5d22a312b7afddaed3cbb2fffb3cceb0c22a6cf5;hp=2c95848fbce8261463e54833d60d68573e9fb9b8;hpb=f0612bbc41f65f5a684f69d714a1a17a6f0f40c5;p=linux-2.6

diff --git a/kernel/kexec.c b/kernel/kexec.c
index 2c95848fbc..58f0f38259 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -6,6 +6,7 @@
  * Version 2.  See the file COPYING for more details.
  */
 
+#include <linux/capability.h>
 #include <linux/mm.h>
 #include <linux/file.h>
 #include <linux/slab.h>
@@ -26,6 +27,9 @@
 #include <asm/system.h>
 #include <asm/semaphore.h>
 
+/* Per cpu memory for storing cpu states in case of system crash. */
+note_buf_t* crash_notes;
+
 /* Location of the reserved area for the crash kernel */
 struct resource crashk_res = {
 	.name  = "Crash kernel",
@@ -898,14 +902,14 @@ static int kimage_load_segment(struct kimage *image,
  * kexec does not sync, or unmount filesystems so if you need
  * that to happen you need to do that yourself.
  */
-struct kimage *kexec_image = NULL;
-static struct kimage *kexec_crash_image = NULL;
+struct kimage *kexec_image;
+struct kimage *kexec_crash_image;
 /*
  * A home grown binary mutex.
  * Nothing can wait so this mutex is safe to use
  * in interrupt context :)
  */
-static int kexec_lock = 0;
+static int kexec_lock;
 
 asmlinkage long sys_kexec_load(unsigned long entry, unsigned long nr_segments,
 				struct kexec_segment __user *segments,
@@ -1054,9 +1058,24 @@ void crash_kexec(struct pt_regs *regs)
 	if (!locked) {
 		image = xchg(&kexec_crash_image, NULL);
 		if (image) {
-			machine_crash_shutdown(regs);
+			struct pt_regs fixed_regs;
+			crash_setup_regs(&fixed_regs, regs);
+			machine_crash_shutdown(&fixed_regs);
 			machine_kexec(image);
 		}
 		xchg(&kexec_lock, 0);
 	}
 }
+
+static int __init crash_notes_memory_init(void)
+{
+	/* Allocate memory for saving cpu registers. */
+	crash_notes = alloc_percpu(note_buf_t);
+	if (!crash_notes) {
+		printk("Kexec: Memory allocation for saving cpu register"
+		" states failed\n");
+		return -ENOMEM;
+	}
+	return 0;
+}
+module_init(crash_notes_memory_init)