Merge to Fedora kernel-2.6.18-1.2224_FC5 patched with stable patch-2.6.18.1-vs2.0...

[linux-2.6.git] / include / asm-i386 / thread_info.h

diff --git a/include/asm-i386/thread_info.h b/include/asm-i386/thread_info.h
index f84290f..b3fa512 100644 (file)
--- a/include/asm-i386/thread_info.h
+++ b/include/asm-i386/thread_info.h
@@ -9,7 +9,6 @@
 
 #ifdef __KERNEL__
 
-#include <linux/config.h>
 #include <linux/compiler.h>
 #include <asm/page.h>
 
@@ -85,17 +84,15 @@ struct 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("esp") __attribute_used__;
+
 /* how to get the thread information struct from C */
 static inline struct thread_info *current_thread_info(void)
 {
-       struct thread_info *ti;
-       __asm__("andl %%esp,%0; ":"=r" (ti) : "0" (~(THREAD_SIZE - 1)));
-       return ti;
+       return (struct thread_info *)(current_stack_pointer & ~(THREAD_SIZE - 1));
 }
 
-/* how to get the current stack pointer from C */
-register unsigned long current_stack_pointer asm("esp") __attribute_used__;
-
 /* thread information allocation */
 #ifdef CONFIG_DEBUG_STACK_USAGE
 #define alloc_thread_info(tsk)                                 \
@@ -138,12 +135,13 @@ register unsigned long current_stack_pointer asm("esp") __attribute_used__;
 #define TIF_NEED_RESCHED       3       /* rescheduling necessary */
 #define TIF_SINGLESTEP         4       /* restore singlestep on return to user mode */
 #define TIF_IRET               5       /* return with iret */
-#define TIF_SYSCALL_EMU                6       /* syscall emulation active */
 #define TIF_SYSCALL_AUDIT      7       /* syscall auditing active */
 #define TIF_SECCOMP            8       /* secure computing */
 #define TIF_RESTORE_SIGMASK    9       /* restore signal mask in do_signal() */
-#define TIF_POLLING_NRFLAG     16      /* true if poll_idle() is polling TIF_NEED_RESCHED */
-#define TIF_MEMDIE             17
+#define TIF_MEMDIE             16
+#define TIF_DEBUG              17      /* uses debug registers */
+#define TIF_IO_BITMAP          18      /* uses I/O bitmap */
+#define TIF_FORCED_TF          19      /* true if TF in eflags artificially */
 
 #define _TIF_SYSCALL_TRACE     (1<<TIF_SYSCALL_TRACE)
 #define _TIF_NOTIFY_RESUME     (1<<TIF_NOTIFY_RESUME)
@@ -151,19 +149,22 @@ register unsigned long current_stack_pointer asm("esp") __attribute_used__;
 #define _TIF_NEED_RESCHED      (1<<TIF_NEED_RESCHED)
 #define _TIF_SINGLESTEP                (1<<TIF_SINGLESTEP)
 #define _TIF_IRET              (1<<TIF_IRET)
-#define _TIF_SYSCALL_EMU       (1<<TIF_SYSCALL_EMU)
 #define _TIF_SYSCALL_AUDIT     (1<<TIF_SYSCALL_AUDIT)
 #define _TIF_SECCOMP           (1<<TIF_SECCOMP)
 #define _TIF_RESTORE_SIGMASK   (1<<TIF_RESTORE_SIGMASK)
-#define _TIF_POLLING_NRFLAG    (1<<TIF_POLLING_NRFLAG)
+#define _TIF_DEBUG             (1<<TIF_DEBUG)
+#define _TIF_IO_BITMAP         (1<<TIF_IO_BITMAP)
+#define _TIF_FORCED_TF         (1<<TIF_FORCED_TF)
 
 /* work to do on interrupt/exception return */
 #define _TIF_WORK_MASK \
-  (0x0000FFFF & ~(_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
-                 _TIF_SECCOMP | _TIF_SYSCALL_EMU))
+  (0x0000FFFF & ~(_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | _TIF_SECCOMP))
 /* work to do on any return to u-space */
 #define _TIF_ALLWORK_MASK      (0x0000FFFF & ~_TIF_SECCOMP)
 
+/* flags to check in __switch_to() */
+#define _TIF_WORK_CTXSW (_TIF_DEBUG|_TIF_IO_BITMAP)
+
 /*
  * Thread-synchronous status.
  *
@@ -172,6 +173,9 @@ register unsigned long current_stack_pointer asm("esp") __attribute_used__;
  * have to worry about atomic accesses.
  */
 #define TS_USEDFPU             0x0001  /* FPU was used by this task this quantum (SMP) */
+#define TS_POLLING             0x0002  /* True if in idle loop and not sleeping */
+
+#define tsk_is_polling(t) ((t)->thread_info->status & TS_POLLING)
 
 #endif /* __KERNEL__ */