--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/include/linux/slab_def.h	Sun Jan 11 20:20:11 2009 +0100
@@ -0,0 +1,98 @@
+#ifndef _LINUX_SLAB_DEF_H
+#define	_LINUX_SLAB_DEF_H
+
+/*
+ * Definitions unique to the original Linux SLAB allocator.
+ *
+ * What we provide here is a way to optimize the frequent kmalloc
+ * calls in the kernel by selecting the appropriate general cache
+ * if kmalloc was called with a size that can be established at
+ * compile time.
+ */
+
+#include <linux/init.h>
+#include <asm/page.h>		/* kmalloc_sizes.h needs PAGE_SIZE */
+#include <asm/cache.h>		/* kmalloc_sizes.h needs L1_CACHE_BYTES */
+#include <linux/compiler.h>
+
+/* Size description struct for general caches. */
+struct cache_sizes {
+	size_t		 	cs_size;
+	struct kmem_cache	*cs_cachep;
+#ifdef CONFIG_ZONE_DMA
+	struct kmem_cache	*cs_dmacachep;
+#endif
+};
+extern struct cache_sizes malloc_sizes[];
+
+void *kmem_cache_alloc(struct kmem_cache *, gfp_t);
+void *__kmalloc(size_t size, gfp_t flags);
+
+static inline void *kmalloc(size_t size, gfp_t flags)
+{
+	if (__builtin_constant_p(size)) {
+		int i = 0;
+
+		if (!size)
+			return ZERO_SIZE_PTR;
+
+#define CACHE(x) \
+		if (size <= x) \
+			goto found; \
+		else \
+			i++;
+#include <linux/kmalloc_sizes.h>
+#undef CACHE
+		{
+			extern void __you_cannot_kmalloc_that_much(void);
+			__you_cannot_kmalloc_that_much();
+		}
+found:
+#ifdef CONFIG_ZONE_DMA
+		if (flags & GFP_DMA)
+			return kmem_cache_alloc(malloc_sizes[i].cs_dmacachep,
+						flags);
+#endif
+		return kmem_cache_alloc(malloc_sizes[i].cs_cachep, flags);
+	}
+	return __kmalloc(size, flags);
+}
+
+#ifdef CONFIG_NUMA
+extern void *__kmalloc_node(size_t size, gfp_t flags, int node);
+extern void *kmem_cache_alloc_node(struct kmem_cache *, gfp_t flags, int node);
+
+static inline void *kmalloc_node(size_t size, gfp_t flags, int node)
+{
+	if (__builtin_constant_p(size)) {
+		int i = 0;
+
+		if (!size)
+			return ZERO_SIZE_PTR;
+
+#define CACHE(x) \
+		if (size <= x) \
+			goto found; \
+		else \
+			i++;
+#include <linux/kmalloc_sizes.h>
+#undef CACHE
+		{
+			extern void __you_cannot_kmalloc_that_much(void);
+			__you_cannot_kmalloc_that_much();
+		}
+found:
+#ifdef CONFIG_ZONE_DMA
+		if (flags & GFP_DMA)
+			return kmem_cache_alloc_node(malloc_sizes[i].cs_dmacachep,
+						flags, node);
+#endif
+		return kmem_cache_alloc_node(malloc_sizes[i].cs_cachep,
+						flags, node);
+	}
+	return __kmalloc_node(size, flags, node);
+}
+
+#endif	/* CONFIG_NUMA */
+
+#endif	/* _LINUX_SLAB_DEF_H */