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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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10
include/asm-parisc/thread_info.h
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@ -34,15 +34,11 @@ struct thread_info {
/* thread information allocation */
#define THREAD_ORDER 2
#define THREAD_SIZE_ORDER 2
/* Be sure to hunt all references to this down when you change the size of
* the kernel stack */
#define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
#define THREAD_SHIFT (PAGE_SHIFT + THREAD_ORDER)
#define alloc_thread_info(tsk) ((struct thread_info *) \
__get_free_pages(GFP_KERNEL, THREAD_ORDER))
#define free_thread_info(ti) free_pages((unsigned long) (ti), THREAD_ORDER)
#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
#define THREAD_SHIFT (PAGE_SHIFT + THREAD_SIZE_ORDER)
/* how to get the thread information struct from C */
#define current_thread_info() ((struct thread_info *)mfctl(30))