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clean up duplicated alloc/free_thread_info

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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 <[email protected]>
Acked-by: Russell King <[email protected]>
Cc: Pekka Enberg <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
FUJITA Tomonori 2008-07-25 01:45:40 -07:00 • committed by Linus Torvalds
commit b69c49b784
23 changed files with 50 additions and 80 deletions
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8
include/asm-m68k/thread_info.h
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@ -25,13 +25,7 @@ struct thread_info {
}
/* THREAD_SIZE should be 8k, so handle differently for 4k and 8k machines */
#if PAGE_SHIFT == 13 /* 8k machines */
#define alloc_thread_info(tsk) ((struct thread_info *)__get_free_pages(GFP_KERNEL,0))
#define free_thread_info(ti) free_pages((unsigned long)(ti),0)
#else /* otherwise assume 4k pages */
#define alloc_thread_info(tsk) ((struct thread_info *)__get_free_pages(GFP_KERNEL,1))
#define free_thread_info(ti) free_pages((unsigned long)(ti),1)
#endif /* PAGE_SHIFT == 13 */
#define THREAD_SIZE_ORDER (13 - PAGE_SHIFT)
#define init_thread_info (init_task.thread.info)
#define init_stack (init_thread_union.stack)