[PATCH] i386: task_stack_page()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/i386/kernel/process.c

@@ -771,7 +771,7 @@ unsigned long get_wchan(struct task_struct *p)
 	int count = 0;
 	if (!p || p == current || p->state == TASK_RUNNING)
 		return 0;
-	stack_page = (unsigned long)p->thread_info;
+	stack_page = (unsigned long)task_stack_page(p);
 	esp = p->thread.esp;
 	if (!stack_page || esp < stack_page || esp > top_esp+stack_page)
 		return 0;

include/asm-i386/processor.h

@@ -574,7 +574,7 @@ unsigned long get_wchan(struct task_struct *p);
 #define task_pt_regs(task)                                             \
 ({                                                                     \
        struct pt_regs *__regs__;                                       \
-       __regs__ = (struct pt_regs *)(KSTK_TOP((task)->thread_info)-8); \
+       __regs__ = (struct pt_regs *)(KSTK_TOP(task_stack_page(task))-8); \
        __regs__ - 1;                                                   \
 })