x86: thread_info: merge thread_info allocation

Make them similar so that both use THREAD_ORDER and THREAD_FLAGS and have a
THREAD_SIZE definition that is setup in asm/page_xx.h

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/page_32.h b/include/asm-x86/page_32.h
index 424e82f..50b33eb 100644 (file)
--- a/include/asm-x86/page_32.h
+++ b/include/asm-x86/page_32.h
@@ -13,6 +13,14 @@
  */
 #define __PAGE_OFFSET          _AC(CONFIG_PAGE_OFFSET, UL)
 
+#ifdef CONFIG_4KSTACKS
+#define THREAD_ORDER   0
+#else
+#define THREAD_ORDER   1
+#endif
+#define THREAD_SIZE    (PAGE_SIZE << THREAD_ORDER)
+
+
 #ifdef CONFIG_X86_PAE
 #define __PHYSICAL_MASK_SHIFT  36
 #define __VIRTUAL_MASK_SHIFT   32

diff --git a/include/asm-x86/thread_info.h b/include/asm-x86/thread_info.h
index b7cd413..348f0e0 100644 (file)
--- a/include/asm-x86/thread_info.h
+++ b/include/asm-x86/thread_info.h
@@ -132,6 +132,7 @@ struct thread_info {
 /* work to do on any return to user space */
 #define _TIF_ALLWORK_MASK (0x0000FFFF & ~_TIF_SECCOMP)
 
+/* Only used for 64 bit */
 #define _TIF_DO_NOTIFY_MASK                                            \
        (_TIF_SIGPENDING|_TIF_SINGLESTEP|_TIF_MCE_NOTIFY|_TIF_HRTICK_RESCHED)
 
@@ -143,18 +144,21 @@ struct thread_info {
 #define _TIF_WORK_CTXSW_PREV _TIF_WORK_CTXSW
 #define _TIF_WORK_CTXSW_NEXT (_TIF_WORK_CTXSW|_TIF_DEBUG)
 
-
 #define PREEMPT_ACTIVE         0x10000000
 
-#ifdef CONFIG_X86_32
-
-#ifdef CONFIG_4KSTACKS
-#define THREAD_SIZE            (4096)
+/* thread information allocation */
+#ifdef CONFIG_DEBUG_STACK_USAGE
+#define THREAD_FLAGS (GFP_KERNEL | __GFP_ZERO)
 #else
-#define THREAD_SIZE            (8192)
+#define THREAD_FLAGS GFP_KERNEL
 #endif
 
-#define STACK_WARN             (THREAD_SIZE/8)
+#define alloc_thread_info(tsk)                                         \
+       ((struct thread_info *)__get_free_pages(THREAD_FLAGS, THREAD_ORDER))
+
+#ifdef CONFIG_X86_32
+
+#define STACK_WARN     (THREAD_SIZE/8)
 /*
  * macros/functions for gaining access to the thread information structure
  *
@@ -173,15 +177,6 @@ static inline struct thread_info *current_thread_info(void)
                (current_stack_pointer & ~(THREAD_SIZE - 1));
 }
 
-/* thread information allocation */
-#ifdef CONFIG_DEBUG_STACK_USAGE
-#define alloc_thread_info(tsk) ((struct thread_info *)                 \
-       __get_free_pages(GFP_KERNEL | __GFP_ZERO, get_order(THREAD_SIZE)))
-#else
-#define alloc_thread_info(tsk) ((struct thread_info *)                 \
-       __get_free_pages(GFP_KERNEL, get_order(THREAD_SIZE)))
-#endif
-
 #else /* !__ASSEMBLY__ */
 
 /* how to get the thread information struct from ASM */
@@ -219,16 +214,6 @@ static inline struct thread_info *stack_thread_info(void)
        return ti;
 }
 
-/* thread information allocation */
-#ifdef CONFIG_DEBUG_STACK_USAGE
-#define THREAD_FLAGS (GFP_KERNEL | __GFP_ZERO)
-#else
-#define THREAD_FLAGS GFP_KERNEL
-#endif
-
-#define alloc_thread_info(tsk)                                         \
-       ((struct thread_info *)__get_free_pages(THREAD_FLAGS, THREAD_ORDER))
-
 #else /* !__ASSEMBLY__ */
 
 /* how to get the thread information struct from ASM */