*/
#define ALIGN_PAGE_MASK 0xffffe000
+/*
+ * Size of kernel stack for each process. This must be a power of 2...
+ */
+#define THREAD_SIZE 8192 /* 2 pages */
+
#ifndef __ASSEMBLY__
typedef unsigned long mm_segment_t;
#define init_thread_info (init_thread_union.thread_info)
#define init_stack (init_thread_union.stack)
-/*
- * Size of kernel stack for each process. This must be a power of 2...
- */
-#define THREAD_SIZE 8192 /* 2 pages */
-
-/* How to get the thread information struct from C */
-
-static inline struct thread_info *current_thread_info(void)
- __attribute__ ((__const__));
-
-/* Given a task stack pointer, you can find it's task structure
- * just by masking it to the 8K boundary.
+/* Given a task stack pointer, you can find its corresponding
+ * thread_info structure just by masking it to the THREAD_SIZE
+ * boundary (currently 8K as you can see above).
*/
+__attribute_const__
static inline struct thread_info *current_thread_info(void)
{
struct thread_info *ti;
__asm__("%0 = sp;": "=&d"(ti):
);
- return (struct thread_info *)((long)ti & ~8191UL);
+ return (struct thread_info *)((long)ti & ~((long)THREAD_SIZE-1));
}
/* thread information allocation */
* thread information flag bit numbers
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
-#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
-#define TIF_SIGPENDING 2 /* signal pending */
-#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
-#define TIF_POLLING_NRFLAG 4 /* true if poll_idle() is polling
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
TIF_NEED_RESCHED */
-#define TIF_MEMDIE 5
-#define TIF_RESTORE_SIGMASK 6 /* restore signal mask in do_signal() */
-#define TIF_FREEZE 7 /* is freezing for suspend */
+#define TIF_MEMDIE 4
+#define TIF_RESTORE_SIGMASK 5 /* restore signal mask in do_signal() */
+#define TIF_FREEZE 6 /* is freezing for suspend */
/* as above, but as bit values */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
-#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)