Those are rather trivial now and its better to see inline what is
really going on.
Signed-off-by: Christoph Lameter <cl@xxxxxxxxx>
---
mm/slab.c | 35 ++++++++---------------------------
1 file changed, 8 insertions(+), 27 deletions(-)
Index: linux-2.6/mm/slab.c
===================================================================
--- linux-2.6.orig/mm/slab.c 2012-06-13 03:44:40.525477462 -0500
+++ linux-2.6/mm/slab.c 2012-06-13 03:45:54.745475924 -0500
@@ -489,16 +489,6 @@ EXPORT_SYMBOL(slab_buffer_size);
static int slab_max_order = SLAB_MAX_ORDER_LO;
static bool slab_max_order_set __initdata;
-/*
- * Functions for storing/retrieving the cachep and or slab from the page
- * allocator. These are used to find the slab an obj belongs to. With kfree(),
- * these are used to find the cache which an obj belongs to.
- */
-static inline void page_set_cache(struct page *page, struct kmem_cache *cache)
-{
- page->slab_cache = cache;
-}
-
static inline struct kmem_cache *page_get_cache(struct page *page)
{
page = compound_head(page);
@@ -506,27 +496,18 @@ static inline struct kmem_cache *page_ge
return page->slab_cache;
}
-static inline void page_set_slab(struct page *page, struct slab *slab)
-{
- page->slab_page = slab;
-}
-
-static inline struct slab *page_get_slab(struct page *page)
-{
- BUG_ON(!PageSlab(page));
- return page->slab_page;
-}
-
static inline struct kmem_cache *virt_to_cache(const void *obj)
{
struct page *page = virt_to_head_page(obj);
- return page_get_cache(page);
+ return page->slab_cache;
}
static inline struct slab *virt_to_slab(const void *obj)
{
struct page *page = virt_to_head_page(obj);
- return page_get_slab(page);
+
+ VM_BUG_ON(!PageSlab(page));
+ return page->slab_page;
}
static inline void *index_to_obj(struct kmem_cache *cache, struct slab *slab,
@@ -2918,8 +2899,8 @@ static void slab_map_pages(struct kmem_c
nr_pages <<= cache->gfporder;
do {
- page_set_cache(page, cache);
- page_set_slab(page, slab);
+ page->slab_cache = cache;
+ page->slab_page = slab;
page++;
} while (--nr_pages);
}
@@ -3057,7 +3038,7 @@ static void *cache_free_debugcheck(struc
kfree_debugcheck(objp);
page = virt_to_head_page(objp);
- slabp = page_get_slab(page);
+ slabp = page->slab_page;
if (cachep->flags & SLAB_RED_ZONE) {
verify_redzone_free(cachep, objp);
@@ -3261,7 +3242,7 @@ static void *cache_alloc_debugcheck_afte
struct slab *slabp;
unsigned objnr;
- slabp = page_get_slab(virt_to_head_page(objp));
+ slabp = virt_to_head_page(objp)->slab_page;
objnr = (unsigned)(objp - slabp->s_mem) / cachep->buffer_size;
slab_bufctl(slabp)[objnr] = BUFCTL_ACTIVE;
}
--
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