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Commit fe844052 authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

hexagon: Use common threadinfo allocator 



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

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: Richard Kuo <rkuo@codeaurora.org>
Link: http://lkml.kernel.org/r/20120505150141.812612113@linutronix.de
parent e6e9c540

arch/hexagon/include/asm/thread_info.h

+0 −8
Original line number Diff line number Diff line
@@ -31,15 +31,7 @@ 


#define THREAD_SHIFT		12

#define THREAD_SIZE		(1<<THREAD_SHIFT)



#if THREAD_SHIFT >= PAGE_SHIFT

#define THREAD_SIZE_ORDER	(THREAD_SHIFT - PAGE_SHIFT)

#else  /*  don't use standard allocator  */

#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR

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

extern void free_thread_info(struct thread_info *ti);

#endif





#ifndef __ASSEMBLY__

arch/hexagon/kernel/process.c

+0 −37
Original line number Diff line number Diff line
@@ -233,43 +233,6 @@ unsigned long get_wchan(struct task_struct *p) 
	return 0;

}



/*

 * Borrowed from PowerPC -- basically allow smaller kernel stacks if we

 * go crazy with the page sizes.

 */

#if THREAD_SHIFT < PAGE_SHIFT



static struct kmem_cache *thread_info_cache;



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

{

	struct thread_info *ti;



	ti = kmem_cache_alloc_node(thread_info_cache, GFP_KERNEL, node);

	if (unlikely(ti == NULL))

		return NULL;

#ifdef CONFIG_DEBUG_STACK_USAGE

	memset(ti, 0, THREAD_SIZE);

#endif

	return ti;

}



void free_thread_info(struct thread_info *ti)

{

	kmem_cache_free(thread_info_cache, ti);

}



/*  Weak symbol; called by init/main.c  */



void thread_info_cache_init(void)

{

	thread_info_cache = kmem_cache_create("thread_info", THREAD_SIZE,

					      THREAD_SIZE, 0, NULL);

	BUG_ON(thread_info_cache == NULL);

}



#endif /* THREAD_SHIFT < PAGE_SHIFT */



/*

 * Required placeholder.

 */