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authorDavid Howells <dhowells@redhat.com>2010-09-29 01:57:02 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2010-09-28 18:01:14 -0700
commit62bdb288bf464862a2801b2e53aadc6c4d100fab (patch)
tree35f321df2ab9091d2f4a1f788b609ad36fed03db /arch/mn10300/mm/cache-disabled.c
parent0f44fbd297e1cda5d9ecc9f5321a86fe647c7d4a (diff)
MN10300: Handle missing sys_cacheflush() when caching disabled
When caching is disabled on the MN10300 arch, the sys_cacheflush() function is removed by conditional stuff in the makefiles, but is still referred to by the syscall table. Provide a null version that just returns 0 when caching is disabled (or -EINVAL if the arguments are silly). Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/mn10300/mm/cache-disabled.c')
-rw-r--r--arch/mn10300/mm/cache-disabled.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/mn10300/mm/cache-disabled.c b/arch/mn10300/mm/cache-disabled.c
new file mode 100644
index 000000000000..f669ea42aba6
--- /dev/null
+++ b/arch/mn10300/mm/cache-disabled.c
@@ -0,0 +1,21 @@
+/* Handle the cache being disabled
+ *
+ * Copyright (C) 2010 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+#include <linux/mm.h>
+
+/*
+ * allow userspace to flush the instruction cache
+ */
+asmlinkage long sys_cacheflush(unsigned long start, unsigned long end)
+{
+ if (end < start)
+ return -EINVAL;
+ return 0;
+}