[PATCH] x86-64: Set the stack pointer correctly in init_thread and init_tss

Signed-off-by: Jan Beulich <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

arch/x86_64/kernel/init_task.c

···
  * section. Since TSS's are completely CPU-local, we want them
  * on exact cacheline boundaries, to eliminate cacheline ping-pong.
  */ 
-DEFINE_PER_CPU(struct tss_struct, init_tss) ____cacheline_maxaligned_in_smp;
+DEFINE_PER_CPU(struct tss_struct, init_tss) ____cacheline_maxaligned_in_smp = INIT_TSS;
 
 #define ALIGN_TO_4K __attribute__((section(".data.init_task")))

include/asm-x86_64/processor.h

···
 	u64 tls_array[GDT_ENTRY_TLS_ENTRIES];
 } __attribute__((aligned(16)));
 
-#define INIT_THREAD  {}
+#define INIT_THREAD  { \
+	.rsp0 = (unsigned long)&init_stack + sizeof(init_stack) \
+}
+
+#define INIT_TSS  { \
+	.rsp0 = (unsigned long)&init_stack + sizeof(init_stack) \
+}
 
 #define INIT_MMAP \
 { &init_mm, 0, 0, NULL, PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC, 1, NULL, NULL }