vserver 2.0 rc7

[linux-2.6.git] / arch / arm / kernel / process.c

diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index dbd8ca8..8f146a4 100644 (file)
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -168,12 +168,11 @@ void machine_restart(char * __unused)
 
 EXPORT_SYMBOL(machine_restart);
 
-void show_regs(struct pt_regs * regs)
+void __show_regs(struct pt_regs *regs)
 {
-       unsigned long flags;
-
-       flags = condition_codes(regs);
+       unsigned long flags = condition_codes(regs);
 
+       printk("CPU: %d\n", smp_processor_id());
        print_symbol("PC is at %s\n", instruction_pointer(regs));
        print_symbol("LR is at %s\n", regs->ARM_lr);
        printk("pc : [<%08lx>]    lr : [<%08lx>]    %s\n"
@@ -213,6 +212,14 @@ void show_regs(struct pt_regs * regs)
        }
 }
 
+void show_regs(struct pt_regs * regs)
+{
+       printk("\n");
+       printk("Pid: %d, comm: %20s\n", current->pid, current->comm);
+       __show_regs(regs);
+       __backtrace();
+}
+
 void show_fpregs(struct user_fp *regs)
 {
        int i;
@@ -249,8 +256,6 @@ static unsigned long *thread_info_head;
 static unsigned int nr_thread_info;
 
 #define EXTRA_TASK_STRUCT      4
-#define ll_alloc_task_struct() ((struct thread_info *) __get_free_pages(GFP_KERNEL,1))
-#define ll_free_task_struct(p) free_pages((unsigned long)(p),1)
 
 struct thread_info *alloc_thread_info(struct task_struct *task)
 {
@@ -267,17 +272,16 @@ struct thread_info *alloc_thread_info(struct task_struct *task)
        }
 
        if (!thread)
-               thread = ll_alloc_task_struct();
+               thread = (struct thread_info *)
+                          __get_free_pages(GFP_KERNEL, THREAD_SIZE_ORDER);
 
-#ifdef CONFIG_MAGIC_SYSRQ
+#ifdef CONFIG_DEBUG_STACK_USAGE
        /*
         * The stack must be cleared if you want SYSRQ-T to
         * give sensible stack usage information
         */
-       if (thread) {
-               char *p = (char *)thread;
-               memzero(p+KERNEL_STACK_SIZE, KERNEL_STACK_SIZE);
-       }
+       if (thread)
+               memzero(thread, THREAD_SIZE);
 #endif
        return thread;
 }
@@ -290,7 +294,7 @@ void free_thread_info(struct thread_info *thread)
                thread_info_head = p;
                nr_thread_info += 1;
        } else
-               ll_free_task_struct(thread);
+               free_pages((unsigned long)thread, THREAD_SIZE_ORDER);
 }
 
 /*
@@ -343,7 +347,7 @@ copy_thread(int nr, unsigned long clone_flags, unsigned long stack_start,
        struct thread_info *thread = p->thread_info;
        struct pt_regs *childregs;
 
-       childregs = ((struct pt_regs *)((unsigned long)thread + THREAD_SIZE - 8)) - 1;
+       childregs = ((struct pt_regs *)((unsigned long)thread + THREAD_START_SP)) - 1;
        *childregs = *regs;
        childregs->ARM_r0 = 0;
        childregs->ARM_sp = stack_start;
@@ -440,15 +444,17 @@ EXPORT_SYMBOL(kernel_thread);
 unsigned long get_wchan(struct task_struct *p)
 {
        unsigned long fp, lr;
-       unsigned long stack_page;
+       unsigned long stack_start, stack_end;
        int count = 0;
        if (!p || p == current || p->state == TASK_RUNNING)
                return 0;
 
-       stack_page = 4096 + (unsigned long)p->thread_info;
+       stack_start = (unsigned long)(p->thread_info + 1);
+       stack_end = ((unsigned long)p->thread_info) + THREAD_SIZE;
+
        fp = thread_saved_fp(p);
        do {
-               if (fp < stack_page || fp > 4092+stack_page)
+               if (fp < stack_start || fp > stack_end)
                        return 0;
                lr = pc_pointer (((unsigned long *)fp)[-1]);
                if (!in_sched_functions(lr))