Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6

[linux-2.6-omap-h63xx.git] / arch / x86 / kernel / machine_kexec_32.c

diff --git a/arch/x86/kernel/machine_kexec_32.c b/arch/x86/kernel/machine_kexec_32.c
index 9fe478d984068fea53488d4405db4066863df39c..0732adba05ca95bfaf851d3d2193df5074478482 100644 (file)
--- a/arch/x86/kernel/machine_kexec_32.c
+++ b/arch/x86/kernel/machine_kexec_32.c
@@ -12,6 +12,7 @@
 #include <linux/init.h>
 #include <linux/numa.h>
 #include <linux/ftrace.h>
+#include <linux/suspend.h>
 
 #include <asm/pgtable.h>
 #include <asm/pgalloc.h>
@@ -78,7 +79,7 @@ static void load_segments(void)
 /*
  * A architecture hook called to validate the
  * proposed image and prepare the control pages
- * as needed.  The pages for KEXEC_CONTROL_CODE_SIZE
+ * as needed.  The pages for KEXEC_CONTROL_PAGE_SIZE
  * have been allocated, but the segments have yet
  * been copied into the kernel.
  *
@@ -113,6 +114,7 @@ void machine_kexec(struct kimage *image)
 {
        unsigned long page_list[PAGES_NR];
        void *control_page;
+       int save_ftrace_enabled;
        asmlinkage unsigned long
                (*relocate_kernel_ptr)(unsigned long indirection_page,
                                       unsigned long control_page,
@@ -120,7 +122,12 @@ void machine_kexec(struct kimage *image)
                                       unsigned int has_pae,
                                       unsigned int preserve_context);
 
-       tracer_disable();
+#ifdef CONFIG_KEXEC_JUMP
+       if (kexec_image->preserve_context)
+               save_processor_state();
+#endif
+
+       save_ftrace_enabled = __ftrace_enabled_save();
 
        /* Interrupts aren't acceptable while we reboot */
        local_irq_disable();
@@ -138,7 +145,7 @@ void machine_kexec(struct kimage *image)
        }
 
        control_page = page_address(image->control_code_page);
-       memcpy(control_page, relocate_kernel, PAGE_SIZE/2);
+       memcpy(control_page, relocate_kernel, KEXEC_CONTROL_CODE_MAX_SIZE);
 
        relocate_kernel_ptr = control_page;
        page_list[PA_CONTROL_PAGE] = __pa(control_page);
@@ -178,6 +185,13 @@ void machine_kexec(struct kimage *image)
                                           (unsigned long)page_list,
                                           image->start, cpu_has_pae,
                                           image->preserve_context);
+
+#ifdef CONFIG_KEXEC_JUMP
+       if (kexec_image->preserve_context)
+               restore_processor_state();
+#endif
+
+       __ftrace_enabled_restore(save_ftrace_enabled);
 }
 
 void arch_crash_save_vmcoreinfo(void)