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x86: clean up stack allocation and free

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Clean up the allocation and freeing of stacks a bit by using a __GFP_ZERO flag
instead of memset.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Mike Travis <travis@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
clameter@sgi.com 2008-01-30 13:30:32 +01:00 committed by Ingo Molnar
parent ec12fa5c80
commit 6ea8bad1c0
1 changed files with 5 additions and 11 deletions
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16
include/asm-x86/thread_info_64.h
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@ -74,20 +74,14 @@ static inline struct thread_info *stack_thread_info(void)
/* thread information allocation */
#ifdef CONFIG_DEBUG_STACK_USAGE
#define alloc_thread_info(tsk) \
({ \
struct thread_info *ret; \
\
ret = ((struct thread_info *) __get_free_pages(GFP_KERNEL,THREAD_ORDER)); \
if (ret) \
memset(ret, 0, THREAD_SIZE); \
ret; \
})
#define THREAD_FLAGS (GFP_KERNEL | __GFP_ZERO)
#else
#define alloc_thread_info(tsk) \
((struct thread_info *) __get_free_pages(GFP_KERNEL,THREAD_ORDER))
#define THREAD_FLAGS GFP_KERNEL
#endif
#define alloc_thread_info(tsk) \
((struct thread_info *) __get_free_pages(THREAD_FLAGS, THREAD_ORDER))
#define free_thread_info(ti) free_pages((unsigned long) (ti), THREAD_ORDER)
#else /* !__ASSEMBLY__ */