commit 629f4f9d59a27d8e58aa612e886e6a9a63ea7aeb
author Seiji Aguchi <seiji.aguchi@hds.com> Thu Jun 20 11:45:44 2013 -0400
committer H. Peter Anvin <hpa@linux.intel.com> Thu Jun 20 22:25:13 2013 -0700
tree 049f9d16e2c304a51fa62d47cde34af8b10fc65d
parent eddc0e922a3530e0f22cef170229bcae3a7d5e31

x86: Rename variables for debugging

Rename variables for debugging to describe meaning of them precisely.

Also, introduce a generic way to switch IDT by checking a current state,
debug on/off.

Signed-off-by: Seiji Aguchi <seiji.aguchi@hds.com>
Link: http://lkml.kernel.org/r/51C323A8.7050905@hds.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Steven Rostedt <rostedt@goodmis.org>

arch/x86/kernel/cpu/common.c

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 22018f7..8f6a0f9 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1071,8 +1071,8 @@
 
 #ifdef CONFIG_X86_64
 struct desc_ptr idt_descr = { NR_VECTORS * 16 - 1, (unsigned long) idt_table };
-struct desc_ptr nmi_idt_descr = { NR_VECTORS * 16 - 1,
-				    (unsigned long) nmi_idt_table };
+struct desc_ptr debug_idt_descr = { NR_VECTORS * 16 - 1,
+				    (unsigned long) debug_idt_table };
 
 DEFINE_PER_CPU_FIRST(union irq_stack_union,
 		     irq_stack_union) __aligned(PAGE_SIZE);
@@ -1148,20 +1148,20 @@
 		 addr > (__get_cpu_var(debug_stack_addr) - DEBUG_STKSZ));
 }
 
-static DEFINE_PER_CPU(u32, debug_stack_use_ctr);
+DEFINE_PER_CPU(u32, debug_idt_ctr);
 
 void debug_stack_set_zero(void)
 {
-	this_cpu_inc(debug_stack_use_ctr);
-	load_idt((const struct desc_ptr *)&nmi_idt_descr);
+	this_cpu_inc(debug_idt_ctr);
+	load_current_idt();
 }
 
 void debug_stack_reset(void)
 {
-	if (WARN_ON(!this_cpu_read(debug_stack_use_ctr)))
+	if (WARN_ON(!this_cpu_read(debug_idt_ctr)))
 		return;
-	if (this_cpu_dec_return(debug_stack_use_ctr) == 0)
-		load_idt((const struct desc_ptr *)&idt_descr);
+	if (this_cpu_dec_return(debug_idt_ctr) == 0)
+		load_current_idt();
 }
 
 #else	/* CONFIG_X86_64 */