fdpic: check that the size returned by kernel_read() is what we asked for

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

diff --git a/include/asm-blackfin/thread_info.h b/include/asm-blackfin/thread_info.h
index fa8f08cf283e2692f6c5291c229721ba96e05287..bc2fe5accf20a7f4c55f5b45c640e7e025a29ec1 100644 (file)
--- a/include/asm-blackfin/thread_info.h
+++ b/include/asm-blackfin/thread_info.h
@@ -39,6 +39,11 @@
  */
 #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;
@@ -76,25 +81,17 @@ struct thread_info {
 #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 */
@@ -118,18 +115,16 @@ static inline struct thread_info *current_thread_info(void)
  * 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)