linux-kernel - [PATCH] i386: init early_gdt_descr and idle task properly on voyager

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Date:	Sat, 28 Apr 2007 17:21:27 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Andi Kleen <ak@...e.de>
CC:	James Bottomley <James.Bottomley@...senPartnership.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH] i386: init early_gdt_descr and idle task properly on voyager

Initialize early_gdt_descr and idle task properly.

[ Incremental fix for "i386: introduce voyager smp_ops, fix voyager build" ]

Signed-off-by: Jeremy Fitzhardinge <jeremy@...source.com>
Cc: James Bottomley <James.Bottomley@...senPartnership.com>
Cc: Eric W. Biederman <ebiederm@...ssion.com>

---
 arch/i386/kernel/smpboot.c           |    3 ---
 arch/i386/mach-voyager/voyager_smp.c |    2 ++
 include/asm-i386/processor.h         |    3 +++
 3 files changed, 5 insertions(+), 3 deletions(-)

===================================================================
--- a/arch/i386/kernel/smpboot.c
+++ b/arch/i386/kernel/smpboot.c
@@ -763,9 +763,6 @@ static inline struct task_struct * alloc
 #define alloc_idle_task(cpu) fork_idle(cpu)
 #endif
 
-/* Defined in head.S */
-extern struct Xgt_desc_struct early_gdt_descr;
-
 static int __cpuinit do_boot_cpu(int apicid, int cpu)
 /*
  * NOTE - on most systems this is a PHYSICAL apic ID, but on multiquad
===================================================================
--- a/arch/i386/mach-voyager/voyager_smp.c
+++ b/arch/i386/mach-voyager/voyager_smp.c
@@ -580,6 +580,8 @@ do_boot_cpu(__u8 cpu)
 	stack_start.esp = (void *) idle->thread.esp;
 
 	init_gdt(cpu);
+ 	per_cpu(current_task, cpu) = idle;
+	early_gdt_descr.address = (unsigned long)get_cpu_gdt_table(cpu);
 	irq_ctx_init(cpu);
 
 	/* Note: Don't modify initial ss override */
===================================================================
--- a/include/asm-i386/processor.h
+++ b/include/asm-i386/processor.h
@@ -749,6 +749,9 @@ extern void enable_sep_cpu(void);
 extern void enable_sep_cpu(void);
 extern int sysenter_setup(void);
 
+/* Defined in head.S */
+extern struct Xgt_desc_struct early_gdt_descr;
+
 extern void cpu_set_gdt(int);
 extern void switch_to_new_gdt(void);
 extern void cpu_init(void);

-
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