X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fx86_64%2Fkernel%2Fmachine_kexec.c;fp=arch%2Fx86_64%2Fkernel%2Fmachine_kexec.c;h=25ac8a3faae635417ae7377cadf7f56ae2dec823;hb=64ba3f394c830ec48a1c31b53dcae312c56f1604;hp=106076b370fc8fa8a4cfc2faf610bf237b2dbde0;hpb=be1e6109ac94a859551f8e1774eb9a8469fe055c;p=linux-2.6.git

diff --git a/arch/x86_64/kernel/machine_kexec.c b/arch/x86_64/kernel/machine_kexec.c
index 106076b37..25ac8a3fa 100644
--- 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.