linux 2.6.16.38 w/ vs2.0.3-rc1

[linux-2.6.git] / arch / x86_64 / kernel / machine_kexec.c

diff --git a/arch/x86_64/kernel/machine_kexec.c b/arch/x86_64/kernel/machine_kexec.c
index 106076b..25ac8a3 100644 (file)
--- a/arch/x86_64/kernel/machine_kexec.c
+++ b/arch/x86_64/kernel/machine_kexec.c
@@ -149,8 +149,8 @@ typedef NORET_TYPE void (*relocate_new_kernel_t)(unsigned long indirection_page,
                                        unsigned long start_address,
                                        unsigned long pgtable) ATTRIB_NORET;
 
-extern const unsigned char relocate_new_kernel[];
-extern const unsigned long relocate_new_kernel_size;
+const extern unsigned char relocate_new_kernel[];
+const extern unsigned long relocate_new_kernel_size;
 
 int machine_kexec_prepare(struct kimage *image)
 {
@@ -207,11 +207,14 @@ NORET_TYPE void machine_kexec(struct kimage *image)
        __flush_tlb();
 
 
-       /* The segment registers are funny things, they have both a
-        * visible and an invisible part.  Whenever the visible part is
-        * set to a specific selector, the invisible part is loaded
-        * with from a table in memory.  At no other time is the
-        * descriptor table in memory accessed.
+       /* The segment registers are funny things, they are
+        * automatically loaded from a table, in memory wherever you
+        * set them to a specific selector, but this table is never
+        * accessed again unless you set the segment to a different selector.
+        *
+        * The more common model are caches where the behide
+        * the scenes work is done, but is also dropped at arbitrary
+        * times.
         *
         * I take advantage of this here by force loading the
         * segments, before I zap the gdt with an invalid value.