sh: stack debugging support.
This adds a DEBUG_STACK_USAGE and DEBUG_STACKOVERFLOW for SH.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/include/asm-sh/thread_info.h b/include/asm-sh/thread_info.h
index 5eb874b..605259f 100644
--- a/include/asm-sh/thread_info.h
+++ b/include/asm-sh/thread_info.h
@@ -29,6 +29,8 @@
#endif
#define PREEMPT_ACTIVE 0x10000000
+#define THREAD_SIZE (PAGE_SIZE * 2)
+#define STACK_WARN (THREAD_SIZE / 8)
/*
* macros/functions for gaining access to the thread information structure
@@ -50,8 +52,6 @@
#define init_thread_info (init_thread_union.thread_info)
#define init_stack (init_thread_union.stack)
-#define THREAD_SIZE (2*PAGE_SIZE)
-
/* how to get the thread information struct from C */
static inline struct thread_info *current_thread_info(void)
{
@@ -73,8 +73,12 @@
}
/* thread information allocation */
-#define alloc_thread_info(ti) ((struct thread_info *) __get_free_pages(GFP_KERNEL,1))
-#define free_thread_info(ti) free_pages((unsigned long) (ti), 1)
+#ifdef CONFIG_DEBUG_STACK_USAGE
+#define alloc_thread_info(ti) kzalloc(THREAD_SIZE, GFP_KERNEL)
+#else
+#define alloc_thread_info(ti) kmalloc(THREAD_SIZE, GFP_KERNEL)
+#endif
+#define free_thread_info(ti) kfree(ti)
#else /* !__ASSEMBLY__ */