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-rw-r--r--mm/slab.c57
1 files changed, 9 insertions, 48 deletions
diff --git a/mm/slab.c b/mm/slab.c
index 944b20581f8..528243e15cc 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -409,9 +409,6 @@ struct kmem_cache {
/* constructor func */
void (*ctor) (void *, struct kmem_cache *, unsigned long);
- /* de-constructor func */
- void (*dtor) (void *, struct kmem_cache *, unsigned long);
-
/* 5) cache creation/removal */
const char *name;
struct list_head next;
@@ -572,21 +569,6 @@ static void **dbg_userword(struct kmem_cache *cachep, void *objp)
#endif
/*
- * Maximum size of an obj (in 2^order pages) and absolute limit for the gfp
- * order.
- */
-#if defined(CONFIG_LARGE_ALLOCS)
-#define MAX_OBJ_ORDER 13 /* up to 32Mb */
-#define MAX_GFP_ORDER 13 /* up to 32Mb */
-#elif defined(CONFIG_MMU)
-#define MAX_OBJ_ORDER 5 /* 32 pages */
-#define MAX_GFP_ORDER 5 /* 32 pages */
-#else
-#define MAX_OBJ_ORDER 8 /* up to 1Mb */
-#define MAX_GFP_ORDER 8 /* up to 1Mb */
-#endif
-
-/*
* Do not go above this order unless 0 objects fit into the slab.
*/
#define BREAK_GFP_ORDER_HI 1
@@ -792,6 +774,7 @@ static inline struct kmem_cache *__find_general_cachep(size_t size,
*/
BUG_ON(malloc_sizes[INDEX_AC].cs_cachep == NULL);
#endif
+ WARN_ON_ONCE(size == 0);
while (size > csizep->cs_size)
csizep++;
@@ -1911,20 +1894,11 @@ static void slab_destroy_objs(struct kmem_cache *cachep, struct slab *slabp)
slab_error(cachep, "end of a freed object "
"was overwritten");
}
- if (cachep->dtor && !(cachep->flags & SLAB_POISON))
- (cachep->dtor) (objp + obj_offset(cachep), cachep, 0);
}
}
#else
static void slab_destroy_objs(struct kmem_cache *cachep, struct slab *slabp)
{
- if (cachep->dtor) {
- int i;
- for (i = 0; i < cachep->num; i++) {
- void *objp = index_to_obj(cachep, slabp, i);
- (cachep->dtor) (objp, cachep, 0);
- }
- }
}
#endif
@@ -2013,7 +1987,7 @@ static size_t calculate_slab_order(struct kmem_cache *cachep,
size_t left_over = 0;
int gfporder;
- for (gfporder = 0; gfporder <= MAX_GFP_ORDER; gfporder++) {
+ for (gfporder = 0; gfporder <= KMALLOC_MAX_ORDER; gfporder++) {
unsigned int num;
size_t remainder;
@@ -2124,7 +2098,7 @@ static int setup_cpu_cache(struct kmem_cache *cachep)
* @align: The required alignment for the objects.
* @flags: SLAB flags
* @ctor: A constructor for the objects.
- * @dtor: A destructor for the objects.
+ * @dtor: A destructor for the objects (not implemented anymore).
*
* Returns a ptr to the cache on success, NULL on failure.
* Cannot be called within a int, but can be interrupted.
@@ -2159,7 +2133,7 @@ kmem_cache_create (const char *name, size_t size, size_t align,
* Sanity checks... these are all serious usage bugs.
*/
if (!name || in_interrupt() || (size < BYTES_PER_WORD) ||
- (size > (1 << MAX_OBJ_ORDER) * PAGE_SIZE) || (dtor && !ctor)) {
+ size > KMALLOC_MAX_SIZE || dtor) {
printk(KERN_ERR "%s: Early error in slab %s\n", __FUNCTION__,
name);
BUG();
@@ -2213,9 +2187,6 @@ kmem_cache_create (const char *name, size_t size, size_t align,
if (flags & SLAB_DESTROY_BY_RCU)
BUG_ON(flags & SLAB_POISON);
#endif
- if (flags & SLAB_DESTROY_BY_RCU)
- BUG_ON(dtor);
-
/*
* Always checks flags, a caller might be expecting debug support which
* isn't available.
@@ -2370,7 +2341,6 @@ kmem_cache_create (const char *name, size_t size, size_t align,
BUG_ON(!cachep->slabp_cache);
}
cachep->ctor = ctor;
- cachep->dtor = dtor;
cachep->name = name;
if (setup_cpu_cache(cachep)) {
@@ -2625,7 +2595,7 @@ static inline kmem_bufctl_t *slab_bufctl(struct slab *slabp)
}
static void cache_init_objs(struct kmem_cache *cachep,
- struct slab *slabp, unsigned long ctor_flags)
+ struct slab *slabp)
{
int i;
@@ -2649,7 +2619,7 @@ static void cache_init_objs(struct kmem_cache *cachep,
*/
if (cachep->ctor && !(cachep->flags & SLAB_POISON))
cachep->ctor(objp + obj_offset(cachep), cachep,
- ctor_flags);
+ 0);
if (cachep->flags & SLAB_RED_ZONE) {
if (*dbg_redzone2(cachep, objp) != RED_INACTIVE)
@@ -2665,7 +2635,7 @@ static void cache_init_objs(struct kmem_cache *cachep,
cachep->buffer_size / PAGE_SIZE, 0);
#else
if (cachep->ctor)
- cachep->ctor(objp, cachep, ctor_flags);
+ cachep->ctor(objp, cachep, 0);
#endif
slab_bufctl(slabp)[i] = i + 1;
}
@@ -2754,7 +2724,6 @@ static int cache_grow(struct kmem_cache *cachep,
struct slab *slabp;
size_t offset;
gfp_t local_flags;
- unsigned long ctor_flags;
struct kmem_list3 *l3;
/*
@@ -2763,7 +2732,6 @@ static int cache_grow(struct kmem_cache *cachep,
*/
BUG_ON(flags & ~(GFP_DMA | GFP_LEVEL_MASK));
- ctor_flags = SLAB_CTOR_CONSTRUCTOR;
local_flags = (flags & GFP_LEVEL_MASK);
/* Take the l3 list lock to change the colour_next on this node */
check_irq_off();
@@ -2808,7 +2776,7 @@ static int cache_grow(struct kmem_cache *cachep,
slabp->nodeid = nodeid;
slab_map_pages(cachep, slabp, objp);
- cache_init_objs(cachep, slabp, ctor_flags);
+ cache_init_objs(cachep, slabp);
if (local_flags & __GFP_WAIT)
local_irq_disable();
@@ -2835,7 +2803,6 @@ failed:
* Perform extra freeing checks:
* - detect bad pointers.
* - POISON/RED_ZONE checking
- * - destructor calls, for caches with POISON+dtor
*/
static void kfree_debugcheck(const void *objp)
{
@@ -2894,12 +2861,6 @@ static void *cache_free_debugcheck(struct kmem_cache *cachep, void *objp,
BUG_ON(objnr >= cachep->num);
BUG_ON(objp != index_to_obj(cachep, slabp, objnr));
- if (cachep->flags & SLAB_POISON && cachep->dtor) {
- /* we want to cache poison the object,
- * call the destruction callback
- */
- cachep->dtor(objp + obj_offset(cachep), cachep, 0);
- }
#ifdef CONFIG_DEBUG_SLAB_LEAK
slab_bufctl(slabp)[objnr] = BUFCTL_FREE;
#endif
@@ -3099,7 +3060,7 @@ static void *cache_alloc_debugcheck_after(struct kmem_cache *cachep,
#endif
objp += obj_offset(cachep);
if (cachep->ctor && cachep->flags & SLAB_POISON)
- cachep->ctor(objp, cachep, SLAB_CTOR_CONSTRUCTOR);
+ cachep->ctor(objp, cachep, 0);
#if ARCH_SLAB_MINALIGN
if ((u32)objp & (ARCH_SLAB_MINALIGN-1)) {
printk(KERN_ERR "0x%p: not aligned to ARCH_SLAB_MINALIGN=%d\n",
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-18 00:51:59 +0000