Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[cascardo/linux.git] / arch / x86 / kernel / cpu / common.c

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index bcc9ccc..9bd910a 100644 (file)
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1264,9 +1264,14 @@ static __init int setup_disablecpuid(char *arg)
 __setup("clearcpuid=", setup_disablecpuid);
 
 #ifdef CONFIG_X86_64
-struct desc_ptr idt_descr = { NR_VECTORS * 16 - 1, (unsigned long) idt_table };
-struct desc_ptr debug_idt_descr = { NR_VECTORS * 16 - 1,
-                                   (unsigned long) debug_idt_table };
+struct desc_ptr idt_descr __ro_after_init = {
+       .size = NR_VECTORS * 16 - 1,
+       .address = (unsigned long) idt_table,
+};
+const struct desc_ptr debug_idt_descr = {
+       .size = NR_VECTORS * 16 - 1,
+       .address = (unsigned long) debug_idt_table,
+};
 
 DEFINE_PER_CPU_FIRST(union irq_stack_union,
                     irq_stack_union) __aligned(PAGE_SIZE) __visible;
@@ -1280,7 +1285,7 @@ DEFINE_PER_CPU(struct task_struct *, current_task) ____cacheline_aligned =
 EXPORT_PER_CPU_SYMBOL(current_task);
 
 DEFINE_PER_CPU(char *, irq_stack_ptr) =
-       init_per_cpu_var(irq_stack_union.irq_stack) + IRQ_STACK_SIZE - 64;
+       init_per_cpu_var(irq_stack_union.irq_stack) + IRQ_STACK_SIZE;
 
 DEFINE_PER_CPU(unsigned int, irq_count) __visible = -1;
 
@@ -1304,11 +1309,6 @@ static DEFINE_PER_CPU_PAGE_ALIGNED(char, exception_stacks
 /* May not be marked __init: used by software suspend */
 void syscall_init(void)
 {
-       /*
-        * LSTAR and STAR live in a bit strange symbiosis.
-        * They both write to the same internal register. STAR allows to
-        * set CS/DS but only a 32bit target. LSTAR sets the 64bit rip.
-        */
        wrmsr(MSR_STAR, 0, (__USER32_CS << 16) | __KERNEL_CS);
        wrmsrl(MSR_LSTAR, (unsigned long)entry_SYSCALL_64);