x86: common thread_info definitions

Merge the thread_info definition into one structure definition for both arches.

The __u32 is equal to unsigned long for 32 bit.

sysenter_return is used both for the IA32 emulation for 64 and x86_32.
Avoid complicated #ifdef by simply always including it.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/include/asm-x86/thread_info.h b/include/asm-x86/thread_info.h
index 4b91f59de8fccf381d50316ff28b7977fa02d8af..71b0880d80b5a550e18de5e5a27d57c016b1dbcc 100644 (file)
--- a/include/asm-x86/thread_info.h
+++ b/include/asm-x86/thread_info.h
@@ -11,47 +11,42 @@
 #include <asm/page.h>
 #include <asm/types.h>
 
-#ifdef CONFIG_X86_32
-
-#ifndef __ASSEMBLY__
-#include <asm/processor.h>
-#endif
-
 /*
  * low level task data that entry.S needs immediate access to
  * - this struct should fit entirely inside of one cache line
  * - this struct shares the supervisor stack pages
- * - if the contents of this structure are changed,
- *   the assembly constants must also be changed
  */
 #ifndef __ASSEMBLY__
+struct task_struct;
+struct exec_domain;
+#include <asm/processor.h>
 
 struct thread_info {
        struct task_struct      *task;          /* main task structure */
        struct exec_domain      *exec_domain;   /* execution domain */
-       unsigned long           flags;          /* low level flags */
-       unsigned long           status;         /* thread-synchronous flags */
+       __u32                   flags;          /* low level flags */
+       __u32                   status;         /* thread synchronous flags */
        __u32                   cpu;            /* current CPU */
-       int                     preempt_count;  /* 0 => preemptable,
+       int                     preempt_count;  /* 0 => preemptable,
                                                   <0 => BUG */
-       mm_segment_t            addr_limit;     /* thread address space:
-                                                  0-0xBFFFFFFF user-thread
-                                                  0-0xFFFFFFFF kernel-thread
-                                               */
-       void                    *sysenter_return;
+       mm_segment_t            addr_limit;
        struct restart_block    restart_block;
+       void __user             *sysenter_return;
+#ifdef CONFIG_X86_32
        unsigned long           previous_esp;   /* ESP of the previous stack in
                                                   case of nested (IRQ) stacks
                                                */
        __u8                    supervisor_stack[0];
+#endif
 };
-
 #else /* !__ASSEMBLY__ */
 
 #include <asm/asm-offsets.h>
 
 #endif
 
+#ifdef CONFIG_X86_32
+
 #define PREEMPT_ACTIVE         0x10000000
 #ifdef CONFIG_4KSTACKS
 #define THREAD_SIZE            (4096)
@@ -181,32 +176,6 @@ static inline struct thread_info *current_thread_info(void)
 
 #include <asm/pda.h>
 
-/*
- * low level task data that entry.S needs immediate access to
- * - this struct should fit entirely inside of one cache line
- * - this struct shares the supervisor stack pages
- */
-#ifndef __ASSEMBLY__
-struct task_struct;
-struct exec_domain;
-#include <asm/processor.h>
-
-struct thread_info {
-       struct task_struct      *task;          /* main task structure */
-       struct exec_domain      *exec_domain;   /* execution domain */
-       __u32                   flags;          /* low level flags */
-       __u32                   status;         /* thread synchronous flags */
-       __u32                   cpu;            /* current CPU */
-       int                     preempt_count;  /* 0 => preemptable,
-                                                  <0 => BUG */
-       mm_segment_t            addr_limit;
-       struct restart_block    restart_block;
-#ifdef CONFIG_IA32_EMULATION
-       void __user             *sysenter_return;
-#endif
-};
-#endif
-
 /*
  * macros/functions for gaining access to the thread information structure
  * preempt_count needs to be 1 initially, until the scheduler is functional.