x86: clean up stack allocation and free (6ea8bad1) · Commits · 戴 / test

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:

include/asm-x86/thread_info_64.h

+5 −11

Original line number	Diff line number	Diff line
		@@ -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__ */