int objects; /* Number of objects in slab */
int refcount; /* Refcount for slab cache destroy */
void (*ctor)(void *, struct kmem_cache *, unsigned long);
- void (*dtor)(void *, struct kmem_cache *, unsigned long);
int inuse; /* Offset to metadata */
int align; /* Alignment */
const char *name; /* Name (only for display!) */
*/
#define KMALLOC_SHIFT_LOW 3
-#ifdef CONFIG_LARGE_ALLOCS
-#define KMALLOC_SHIFT_HIGH ((MAX_ORDER + PAGE_SHIFT) =< 25 ? \
- (MAX_ORDER + PAGE_SHIFT - 1) : 25)
-#else
-#if !defined(CONFIG_MMU) || NR_CPUS > 512 || MAX_NUMNODES > 256
-#define KMALLOC_SHIFT_HIGH 20
-#else
-#define KMALLOC_SHIFT_HIGH 18
-#endif
-#endif
-
/*
* We keep the general caches in an array of slab caches that are used for
* 2^x bytes of allocations.
* Sorry that the following has to be that ugly but some versions of GCC
* have trouble with constant propagation and loops.
*/
-static inline int kmalloc_index(int size)
+static inline int kmalloc_index(size_t size)
{
/*
* We should return 0 if size == 0 but we use the smallest object
*/
WARN_ON_ONCE(size == 0);
- if (size > (1 << KMALLOC_SHIFT_HIGH))
+ if (size > KMALLOC_MAX_SIZE)
return -1;
if (size > 64 && size <= 96)
if (size <= 64 * 1024) return 16;
if (size <= 128 * 1024) return 17;
if (size <= 256 * 1024) return 18;
-#if KMALLOC_SHIFT_HIGH > 18
if (size <= 512 * 1024) return 19;
if (size <= 1024 * 1024) return 20;
-#endif
-#if KMALLOC_SHIFT_HIGH > 20
if (size <= 2 * 1024 * 1024) return 21;
if (size <= 4 * 1024 * 1024) return 22;
if (size <= 8 * 1024 * 1024) return 23;
if (size <= 16 * 1024 * 1024) return 24;
if (size <= 32 * 1024 * 1024) return 25;
-#endif
return -1;
/*
if (index == 0)
return NULL;
- if (index < 0) {
+ /*
+ * This function only gets expanded if __builtin_constant_p(size), so
+ * testing it here shouldn't be needed. But some versions of gcc need
+ * help.
+ */
+ if (__builtin_constant_p(size) && index < 0) {
/*
* Generate a link failure. Would be great if we could
* do something to stop the compile here.