Slab allocators: define common size limitations

[pandora-kernel.git] / include / linux / slab.h

diff --git a/include/linux/slab.h b/include/linux/slab.h
index 71829ef..a015236 100644 (file)
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -32,9 +32,6 @@ typedef struct kmem_cache kmem_cache_t __deprecated;
 #define SLAB_MEM_SPREAD                0x00100000UL    /* Spread some memory over cpuset */
 #define SLAB_TRACE             0x00200000UL    /* Trace allocations and frees */
 
-/* Flags passed to a constructor functions */
-#define SLAB_CTOR_CONSTRUCTOR  0x001UL         /* If not set, then deconstructor */
-
 /*
  * struct kmem_cache related prototypes
  */
@@ -76,6 +73,21 @@ static inline void *kmem_cache_alloc_node(struct kmem_cache *cachep,
 }
 #endif
 
+/*
+ * The largest kmalloc size supported by the slab allocators is
+ * 32 megabyte (2^25) or the maximum allocatable page order if that is
+ * less than 32 MB.
+ *
+ * WARNING: Its not easy to increase this value since the allocators have
+ * to do various tricks to work around compiler limitations in order to
+ * ensure proper constant folding.
+ */
+#define KMALLOC_SHIFT_HIGH     ((MAX_ORDER + PAGE_SHIFT) <= 25 ? \
+                               (MAX_ORDER + PAGE_SHIFT) : 25)
+
+#define KMALLOC_MAX_SIZE       (1UL << KMALLOC_SHIFT_HIGH)
+#define KMALLOC_MAX_ORDER      (KMALLOC_SHIFT_HIGH - PAGE_SHIFT)
+
 /*
  * Common kmalloc functions provided by all allocators
  */
@@ -233,9 +245,6 @@ extern void *__kmalloc_node_track_caller(size_t, gfp_t, int, void *);
 
 #endif /* DEBUG_SLAB */
 
-extern const struct seq_operations slabinfo_op;
-ssize_t slabinfo_write(struct file *, const char __user *, size_t, loff_t *);
-
 #endif /* __KERNEL__ */
 #endif /* _LINUX_SLAB_H */