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>

1 files changed, 12 insertions, 43 deletions

diff --git a/include/asm-x86/thread_info.h b/include/asm-x86/thread_info.h
index 4b91f59de8fc..71b0880d80b5 100644
--- 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)
@@ -182,32 +177,6 @@ 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.
  */