x86: unify thread struct.

The thread_struct is not fundamentally different between architectures, and
this patch puts it in the common header. What's really unique for each of
them is enclosed in ifdefs.
Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

include/asm-x86/processor.h

@@ -126,6 +126,50 @@ extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c);
 extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c);
 extern unsigned short num_cache_leaves;
 
+struct thread_struct {
+/* cached TLS descriptors. */
+	struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
+	unsigned long	sp0;
+	unsigned long	sp;
+#ifdef CONFIG_X86_32
+	unsigned long	sysenter_cs;
+#else
+	unsigned long 	usersp;	/* Copy from PDA */
+	unsigned short	es, ds, fsindex, gsindex;
+#endif
+	unsigned long	ip;
+	unsigned long	fs;
+	unsigned long	gs;
+/* Hardware debugging registers */
+	unsigned long	debugreg0;
+	unsigned long	debugreg1;
+	unsigned long	debugreg2;
+	unsigned long	debugreg3;
+	unsigned long	debugreg6;
+	unsigned long	debugreg7;
+/* fault info */
+	unsigned long	cr2, trap_no, error_code;
+/* floating point info */
+	union i387_union	i387 __attribute__((aligned(16)));;
+#ifdef CONFIG_X86_32
+/* virtual 86 mode info */
+	struct vm86_struct __user *vm86_info;
+	unsigned long		screen_bitmap;
+	unsigned long		v86flags, v86mask, saved_sp0;
+	unsigned int		saved_fs, saved_gs;
+#endif
+/* IO permissions */
+	unsigned long	*io_bitmap_ptr;
+	unsigned long	iopl;
+/* max allowed port in the bitmap, in bytes: */
+	unsigned io_bitmap_max;
+/* MSR_IA32_DEBUGCTLMSR value to switch in if TIF_DEBUGCTLMSR is set.  */
+	unsigned long	debugctlmsr;
+/* Debug Store - if not 0 points to a DS Save Area configuration;
+ *               goes into MSR_IA32_DS_AREA */
+	unsigned long	ds_area_msr;
+};
+
 static inline unsigned long native_get_debugreg(int regno)
 {
 	unsigned long val = 0; 	/* Damn you, gcc! */

include/asm-x86/processor_32.h

@@ -176,43 +176,6 @@ typedef struct {
 
 #define ARCH_MIN_TASKALIGN	16
 
-struct thread_struct {
-/* cached TLS descriptors. */
-	struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
-	unsigned long	sp0;
-	unsigned long	sysenter_cs;
-	unsigned long	ip;
-	unsigned long	sp;
-	unsigned long	fs;
-	unsigned long	gs;
-/* Hardware debugging registers */
-	unsigned long	debugreg0;
-	unsigned long	debugreg1;
-	unsigned long	debugreg2;
-	unsigned long	debugreg3;
-	unsigned long	debugreg6;
-	unsigned long	debugreg7;
-/* fault info */
-	unsigned long	cr2, trap_no, error_code;
-/* floating point info */
-	union i387_union	i387;
-/* virtual 86 mode info */
-	struct vm86_struct __user * vm86_info;
-	unsigned long		screen_bitmap;
-	unsigned long		v86flags, v86mask, saved_sp0;
-	unsigned int		saved_fs, saved_gs;
-/* IO permissions */
-	unsigned long	*io_bitmap_ptr;
- 	unsigned long	iopl;
-/* max allowed port in the bitmap, in bytes: */
-	unsigned long	io_bitmap_max;
-/* MSR_IA32_DEBUGCTLMSR value to switch in if TIF_DEBUGCTLMSR is set.  */
-	unsigned long	debugctlmsr;
-/* Debug Store - if not 0 points to a DS Save Area configuration;
- *               goes into MSR_IA32_DS_AREA */
-	unsigned long	ds_area_msr;
-};
-
 #define INIT_THREAD  {							\
 	.sp0 = sizeof(init_stack) + (long)&init_stack,			\
 	.vm86_info = NULL,						\

include/asm-x86/processor_64.h

@@ -125,38 +125,6 @@ DECLARE_PER_CPU(struct orig_ist, orig_ist);
 #define ARCH_MIN_MMSTRUCT_ALIGN	0
 #endif
 
-struct thread_struct {
-	unsigned long	sp0;
-	unsigned long	sp;
-	unsigned long 	usersp;	/* Copy from PDA */
-	unsigned long	fs;
-	unsigned long	gs;
-	unsigned short	es, ds, fsindex, gsindex;	
-/* Hardware debugging registers */
-	unsigned long	debugreg0;  
-	unsigned long	debugreg1;  
-	unsigned long	debugreg2;  
-	unsigned long	debugreg3;  
-	unsigned long	debugreg6;  
-	unsigned long	debugreg7;  
-/* fault info */
-	unsigned long	cr2, trap_no, error_code;
-/* floating point info */
-	union i387_union	i387  __attribute__((aligned(16)));
-/* IO permissions. the bitmap could be moved into the GDT, that would make
-   switch faster for a limited number of ioperm using tasks. -AK */
-	int		ioperm;
-	unsigned long	*io_bitmap_ptr;
-	unsigned io_bitmap_max;
-/* MSR_IA32_DEBUGCTLMSR value to switch in if TIF_DEBUGCTLMSR is set.  */
-	unsigned long	debugctlmsr;
-/* Debug Store - if not 0 points to a DS Save Area configuration;
- *               goes into MSR_IA32_DS_AREA */
-	unsigned long	ds_area_msr;
-/* cached TLS descriptors. */
-	struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
-} __attribute__((aligned(16)));
-
 #define INIT_THREAD  { \
 	.sp0 = (unsigned long)&init_stack + sizeof(init_stack) \
 }