clean up duplicated alloc/free_thread_info

We duplicate alloc/free_thread_info defines on many platforms (the
majority uses __get_free_pages/free_pages).  This patch defines common
defines and removes these duplicated defines.
__HAVE_ARCH_THREAD_INFO_ALLOCATOR is introduced for platforms that do
something different.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 13 deletions

diff --git a/include/asm-arm/thread_info.h b/include/asm-arm/thread_info.h
index f5a664786311..d4be2d646160 100644
--- a/include/asm-arm/thread_info.h
+++ b/include/asm-arm/thread_info.h
@@ -97,19 +97,6 @@ static inline struct thread_info *current_thread_info(void)
         return (struct thread_info *)(sp & ~(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, \
-                THREAD_SIZE_ORDER))
-#else
-#define alloc_thread_info(tsk) \
-        ((struct thread_info *)__get_free_pages(GFP_KERNEL, THREAD_SIZE_ORDER))
-#endif
-
-#define free_thread_info(info) \
-        free_pages((unsigned long)info, THREAD_SIZE_ORDER);
-
 #define thread_saved_pc(tsk)    \
         ((unsigned long)(pc_pointer(task_thread_info(tsk)->cpu_context.pc)))
 #define thread_saved_fp(tsk)    \