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Commit df9a7b9b authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

sh-use-common-threadinfo-allocator 



The core now has a threadinfo allocator which uses a kmemcache when
THREAD_SIZE < PAGE_SIZE.

Deal with the xstate cleanup in the new arch_release_task_struct()
function.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: Paul Mundt <lethal@linux-sh.org>
Link: http://lkml.kernel.org/r/20120505150142.189348931@linutronix.de
parent c03a6a7b

arch/sh/include/asm/thread_info.h

+1 −9
Original line number Original line Diff line number Diff line
@@ -88,21 +88,13 @@ static inline struct thread_info *current_thread_info(void) 
	return ti;

	return ti;

}

}





/* thread information allocation */

#if THREAD_SHIFT >= PAGE_SHIFT



#define THREAD_SIZE_ORDER	(THREAD_SHIFT - PAGE_SHIFT)

#define THREAD_SIZE_ORDER	(THREAD_SHIFT - PAGE_SHIFT)





#endif



extern struct thread_info *alloc_thread_info_node(struct task_struct *tsk, int node);

extern void free_thread_info(struct thread_info *ti);

extern void arch_task_cache_init(void);

extern void arch_task_cache_init(void);

extern int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src);

extern int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src);

extern void arch_release_task_struct(struct task_struct *tsk);

extern void init_thread_xstate(void);

extern void init_thread_xstate(void);





#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR



#endif /* __ASSEMBLY__ */

#endif /* __ASSEMBLY__ */





/*

/*

arch/sh/kernel/process.c

+2 −44
Original line number Original line Diff line number Diff line
@@ -29,52 +29,10 @@ void free_thread_xstate(struct task_struct *tsk) 
	}

	}

}

}





#if THREAD_SHIFT < PAGE_SHIFT

void arch_release_task_struct(struct task_struct *tsk)

static struct kmem_cache *thread_info_cache;



struct thread_info *alloc_thread_info_node(struct task_struct *tsk, int node)

{

	struct thread_info *ti;

#ifdef CONFIG_DEBUG_STACK_USAGE

	gfp_t mask = GFP_KERNEL | __GFP_ZERO;

#else

	gfp_t mask = GFP_KERNEL;

#endif



	ti = kmem_cache_alloc_node(thread_info_cache, mask, node);

	return ti;

}



void free_thread_info(struct thread_info *ti)

{

	free_thread_xstate(ti->task);

	kmem_cache_free(thread_info_cache, ti);

}



void thread_info_cache_init(void)

{

	thread_info_cache = kmem_cache_create("thread_info", THREAD_SIZE,

					      THREAD_SIZE, SLAB_PANIC, NULL);

}

#else

struct thread_info *alloc_thread_info_node(struct task_struct *tsk, int node)

{

#ifdef CONFIG_DEBUG_STACK_USAGE

	gfp_t mask = GFP_KERNEL | __GFP_ZERO;

#else

	gfp_t mask = GFP_KERNEL;

#endif

	struct page *page = alloc_pages_node(node, mask, THREAD_SIZE_ORDER);



	return page ? page_address(page) : NULL;

}



void free_thread_info(struct thread_info *ti)

{

{

	free_thread_xstate(ti->task);

	free_thread_xstate(tsk);

	free_pages((unsigned long)ti, THREAD_SIZE_ORDER);

}

}

#endif /* THREAD_SHIFT < PAGE_SHIFT */





void arch_task_cache_init(void)

void arch_task_cache_init(void)

{

{