1 files changed, 51 insertions, 0 deletions

diff --git a/include/linux/zsmalloc.h b/include/linux/zsmalloc.h
new file mode 100644
index 000000000000..e44d634e7fb7
--- /dev/null
+++ b/include/linux/zsmalloc.h
@@ -0,0 +1,51 @@
+/*
+ * zsmalloc memory allocator
+ *
+ * Copyright (C) 2011  Nitin Gupta
+ * Copyright (C) 2012, 2013 Minchan Kim
+ *
+ * This code is released using a dual license strategy: BSD/GPL
+ * You can choose the license that better fits your requirements.
+ *
+ * Released under the terms of 3-clause BSD License
+ * Released under the terms of GNU General Public License Version 2.0
+ */
+
+#ifndef _ZS_MALLOC_H_
+#define _ZS_MALLOC_H_
+
+#include <linux/types.h>
+
+/*
+ * zsmalloc mapping modes
+ *
+ * NOTE: These only make a difference when a mapped object spans pages.
+ * They also have no effect when PGTABLE_MAPPING is selected.
+ */
+enum zs_mapmode {
+        ZS_MM_RW, /* normal read-write mapping */
+        ZS_MM_RO, /* read-only (no copy-out at unmap time) */
+        ZS_MM_WO /* write-only (no copy-in at map time) */
+        /*
+         * NOTE: ZS_MM_WO should only be used for initializing new
+         * (uninitialized) allocations.  Partial writes to already
+         * initialized allocations should use ZS_MM_RW to preserve the
+         * existing data.
+         */
+};
+
+struct zs_pool;
+
+struct zs_pool *zs_create_pool(gfp_t flags);
+void zs_destroy_pool(struct zs_pool *pool);
+
+unsigned long zs_malloc(struct zs_pool *pool, size_t size);
+void zs_free(struct zs_pool *pool, unsigned long obj);
+
+void *zs_map_object(struct zs_pool *pool, unsigned long handle,
+                        enum zs_mapmode mm);
+void zs_unmap_object(struct zs_pool *pool, unsigned long handle);
+
+u64 zs_get_total_size_bytes(struct zs_pool *pool);
+
+#endif