Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shaggy...

[linux-2.6-omap-h63xx.git] / include / asm-sh / thread_info.h

diff --git a/include/asm-sh/thread_info.h b/include/asm-sh/thread_info.h
index 605259f88113efda4e71f2a9bd1005d00b5c8f2b..3ebc3f9039ebe3f6cebdaa43c913c5c93dbd0547 100644 (file)
--- a/include/asm-sh/thread_info.h
+++ b/include/asm-sh/thread_info.h
@@ -9,8 +9,8 @@
  *  Copyright (C) 2002  David Howells (dhowells@redhat.com)
  *  - Incorporating suggestions made by Linus Torvalds and Dave Miller
  */
-
 #ifdef __KERNEL__
+#include <asm/page.h>
 
 #ifndef __ASSEMBLY__
 #include <asm/processor.h>
@@ -23,13 +23,20 @@ struct thread_info {
        int                     preempt_count; /* 0 => preemptable, <0 => BUG */
        mm_segment_t            addr_limit;     /* thread address space */
        struct restart_block    restart_block;
+       unsigned long           previous_sp;    /* sp of previous stack in case
+                                                  of nested IRQ stacks */
        __u8                    supervisor_stack[0];
 };
 
 #endif
 
 #define PREEMPT_ACTIVE         0x10000000
+
+#ifdef CONFIG_4KSTACKS
+#define THREAD_SIZE            (PAGE_SIZE)
+#else
 #define THREAD_SIZE            (PAGE_SIZE * 2)
+#endif
 #define STACK_WARN             (THREAD_SIZE / 8)
 
 /*
@@ -52,6 +59,9 @@ struct thread_info {
 #define init_thread_info       (init_thread_union.thread_info)
 #define init_stack             (init_thread_union.stack)
 
+/* how to get the current stack pointer from C */
+register unsigned long current_stack_pointer asm("r15") __attribute_used__;
+
 /* how to get the thread information struct from C */
 static inline struct thread_info *current_thread_info(void)
 {