Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / tile / include / asm / kmap_types.h

diff --git a/kernel/arch/tile/include/asm/kmap_types.h b/kernel/arch/tile/include/asm/kmap_types.h
new file mode 100644 (file)
index 0000000..92b28e3
--- /dev/null
+++ b/kernel/arch/tile/include/asm/kmap_types.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_KMAP_TYPES_H
+#define _ASM_TILE_KMAP_TYPES_H
+
+/*
+ * In 32-bit TILE Linux we have to balance the desire to have a lot of
+ * nested atomic mappings with the fact that large page sizes and many
+ * processors chew up address space quickly.  In a typical
+ * 64-processor, 64KB-page layout build, making KM_TYPE_NR one larger
+ * adds 4MB of required address-space.  For now we leave KM_TYPE_NR
+ * set to depth 8.
+ */
+#define        KM_TYPE_NR 8
+
+#endif /* _ASM_TILE_KMAP_TYPES_H */