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-rw-r--r--arch/arm64/include/asm/shmparam.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/shmparam.h b/arch/arm64/include/asm/shmparam.h
new file mode 100644
index 0000000000..f920e22ec6
--- /dev/null
+++ b/arch/arm64/include/asm/shmparam.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2012 ARM Ltd.
+ */
+#ifndef __ASM_SHMPARAM_H
+#define __ASM_SHMPARAM_H
+
+/*
+ * For IPC syscalls from compat tasks, we need to use the legacy 16k
+ * alignment value. Since we don't have aliasing D-caches, the rest of
+ * the time we can safely use PAGE_SIZE.
+ */
+#define COMPAT_SHMLBA (4 * PAGE_SIZE)
+
+#include <asm-generic/shmparam.h>
+
+#endif /* __ASM_SHMPARAM_H */