summaryrefslogtreecommitdiffstats
path: root/kernel/arch/powerpc/include/asm/mm-arch-hooks.h
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/arch/powerpc/include/asm/mm-arch-hooks.h')
-rw-r--r--kernel/arch/powerpc/include/asm/mm-arch-hooks.h28
1 files changed, 28 insertions, 0 deletions
diff --git a/kernel/arch/powerpc/include/asm/mm-arch-hooks.h b/kernel/arch/powerpc/include/asm/mm-arch-hooks.h
new file mode 100644
index 000000000..f2a2da895
--- /dev/null
+++ b/kernel/arch/powerpc/include/asm/mm-arch-hooks.h
@@ -0,0 +1,28 @@
+/*
+ * Architecture specific mm hooks
+ *
+ * Copyright (C) 2015, IBM Corporation
+ * Author: Laurent Dufour <ldufour@linux.vnet.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _ASM_POWERPC_MM_ARCH_HOOKS_H
+#define _ASM_POWERPC_MM_ARCH_HOOKS_H
+
+static inline void arch_remap(struct mm_struct *mm,
+ unsigned long old_start, unsigned long old_end,
+ unsigned long new_start, unsigned long new_end)
+{
+ /*
+ * mremap() doesn't allow moving multiple vmas so we can limit the
+ * check to old_start == vdso_base.
+ */
+ if (old_start == mm->context.vdso_base)
+ mm->context.vdso_base = new_start;
+}
+#define arch_remap arch_remap
+
+#endif /* _ASM_POWERPC_MM_ARCH_HOOKS_H */