[PATCH] arm26: 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>

diff --git a/arch/arm26/kernel/traps.c b/arch/arm26/kernel/traps.c
index f64f590..5847ea5 100644 (file)
--- a/arch/arm26/kernel/traps.c
+++ b/arch/arm26/kernel/traps.c
@@ -132,7 +132,7 @@ static void dump_instr(struct pt_regs *regs)
 
 /*static*/ void __dump_stack(struct task_struct *tsk, unsigned long sp)
 {
-       dump_mem("Stack: ", sp, 8192+(unsigned long)tsk->thread_info);
+       dump_mem("Stack: ", sp, 8192+(unsigned long)task_stack_page(tsk));
 }
 
 void dump_stack(void)
@@ -158,7 +158,7 @@ void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk)
        } else if (verify_stack(fp)) {
                printk("invalid frame pointer 0x%08x", fp);
                ok = 0;
-       } else if (fp < (unsigned long)(tsk->thread_info + 1))
+       } else if (fp < (unsigned long)end_of_stack(tsk))
                printk("frame pointer underflow");
        printk("\n");
 
@@ -168,7 +168,7 @@ void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk)
 
 /* FIXME - this is probably wrong.. */
 void show_stack(struct task_struct *task, unsigned long *sp) {
-       dump_mem("Stack: ", (unsigned long)sp, 8192+(unsigned long)task->thread_info);
+       dump_mem("Stack: ", (unsigned long)sp, 8192+(unsigned long)task_stack_page(task));
 }
 
 DEFINE_SPINLOCK(die_lock);
@@ -187,7 +187,7 @@ NORET_TYPE void die(const char *str, struct pt_regs *regs, int err)
        printk("CPU: %d\n", smp_processor_id());
        show_regs(regs);
        printk("Process %s (pid: %d, stack limit = 0x%p)\n",
-               current->comm, current->pid, tsk->thread_info + 1);
+               current->comm, current->pid, end_of_stack(tsk));
 
        if (!user_mode(regs) || in_interrupt()) {
                __dump_stack(tsk, (unsigned long)(regs + 1));

diff --git a/include/asm-arm26/thread_info.h b/include/asm-arm26/thread_info.h
index f332b40..7a35e7a 100644 (file)
--- a/include/asm-arm26/thread_info.h
+++ b/include/asm-arm26/thread_info.h
@@ -82,7 +82,7 @@ static inline struct thread_info *current_thread_info(void)
 
 /* FIXME - PAGE_SIZE < 32K */
 #define THREAD_SIZE            (8*32768) // FIXME - this needs attention (see kernel/fork.c which gets a nice div by zero if this is lower than 8*32768
-#define task_pt_regs(task) ((struct pt_regs *)((unsigned long)(task)->thread_info + THREAD_SIZE - 8) - 1)
+#define task_pt_regs(task) ((struct pt_regs *)(task_stack_page(task) + THREAD_SIZE - 8) - 1)
 
 extern struct thread_info *alloc_thread_info(struct task_struct *task);
 extern void free_thread_info(struct thread_info *);