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Commit 224a88be authored by Christoph Lameter's avatar Christoph Lameter Committed by Pekka Enberg
Browse files

slub: for_each_object must be passed the number of objects in a slab 



Pass the number of objects to the for_each_object macro. Most of these are
debug related.

Signed-off-by: default avatarChristoph Lameter <clameter@sgi.com>
Signed-off-by: default avatarPekka Enberg <penberg@cs.helsinki.fi>
parent 39b26464

mm/slub.c

+18 −6
Original line number Diff line number Diff line
@@ -327,8 +327,8 @@ static inline void set_freepointer(struct kmem_cache *s, void *object, void *fp) 
}



/* Loop over all objects in a slab */

#define for_each_object(__p, __s, __addr) \

	for (__p = (__addr); __p < (__addr) + (__s)->objects * (__s)->size;\

#define for_each_object(__p, __s, __addr, __objects) \

	for (__p = (__addr); __p < (__addr) + (__objects) * (__s)->size;\

			__p += (__s)->size)



/* Scan freelist */
@@ -774,6 +774,7 @@ static int on_freelist(struct kmem_cache *s, struct page *page, void *search) 
	int nr = 0;

	void *fp = page->freelist;

	void *object = NULL;

	unsigned long max_objects;



	while (fp && nr <= page->objects) {

		if (fp == search)
@@ -798,6 +799,16 @@ static int on_freelist(struct kmem_cache *s, struct page *page, void *search) 
		nr++;

	}



	max_objects = (PAGE_SIZE << compound_order(page)) / s->size;

	if (max_objects > 65535)

		max_objects = 65535;



	if (page->objects != max_objects) {

		slab_err(s, page, "Wrong number of objects. Found %d but "

			"should be %d", page->objects, max_objects);

		page->objects = max_objects;

		slab_fix(s, "Number of objects adjusted.");

	}

	if (page->inuse != page->objects - nr) {

		slab_err(s, page, "Wrong object count. Counter is %d but "

			"counted were %d", page->inuse, page->objects - nr);
@@ -1135,7 +1146,7 @@ static struct page *new_slab(struct kmem_cache *s, gfp_t flags, int node) 
		memset(start, POISON_INUSE, PAGE_SIZE << s->order);



	last = start;

	for_each_object(p, s, start) {

	for_each_object(p, s, start, page->objects) {

		setup_object(s, page, last);

		set_freepointer(s, last, p);

		last = p;
@@ -1157,7 +1168,8 @@ static void __free_slab(struct kmem_cache *s, struct page *page) 
		void *p;



		slab_pad_check(s, page);

		for_each_object(p, s, page_address(page))

		for_each_object(p, s, page_address(page),

						page->objects)

			check_object(s, page, p, 0);

		ClearSlabDebug(page);

	}
@@ -3273,7 +3285,7 @@ static int validate_slab(struct kmem_cache *s, struct page *page, 
			return 0;

	}



	for_each_object(p, s, addr)

	for_each_object(p, s, addr, page->objects)

		if (!test_bit(slab_index(p, s, addr), map))

			if (!check_object(s, page, p, 1))

				return 0;
@@ -3549,7 +3561,7 @@ static void process_slab(struct loc_track *t, struct kmem_cache *s, 
	for_each_free_object(p, s, page->freelist)

		set_bit(slab_index(p, s, addr), map);



	for_each_object(p, s, addr)

	for_each_object(p, s, addr, page->objects)

		if (!test_bit(slab_index(p, s, addr), map))

			add_location(t, s, get_track(s, p, alloc));

}