x86: clean up stack allocation and free
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>
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1 changed files with 5 additions and 11 deletions
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@ -74,20 +74,14 @@ static inline struct thread_info *stack_thread_info(void)
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/* thread information allocation */
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#ifdef CONFIG_DEBUG_STACK_USAGE
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#define alloc_thread_info(tsk) \
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({ \
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struct thread_info *ret; \
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\
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ret = ((struct thread_info *) __get_free_pages(GFP_KERNEL,THREAD_ORDER)); \
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if (ret) \
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memset(ret, 0, THREAD_SIZE); \
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ret; \
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})
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#define THREAD_FLAGS (GFP_KERNEL | __GFP_ZERO)
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#else
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#define alloc_thread_info(tsk) \
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((struct thread_info *) __get_free_pages(GFP_KERNEL,THREAD_ORDER))
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#define THREAD_FLAGS GFP_KERNEL
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#endif
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#define alloc_thread_info(tsk) \
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((struct thread_info *) __get_free_pages(THREAD_FLAGS, THREAD_ORDER))
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#define free_thread_info(ti) free_pages((unsigned long) (ti), THREAD_ORDER)
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#else /* !__ASSEMBLY__ */
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