mm, oom: do not schedule if current has been killed

[deliverable/linux.git] / include / linux / io.h

diff --git a/include/linux/io.h b/include/linux/io.h
index 7fd2d2138bf3de8130e5660922a32fe81a47f22b..069e4075f8720331f99696e34a563d4ac1b76e35 100644 (file)
--- a/include/linux/io.h
+++ b/include/linux/io.h
@@ -67,4 +67,13 @@ int check_signature(const volatile void __iomem *io_addr,
                        const unsigned char *signature, int length);
 void devm_ioremap_release(struct device *dev, void *res);
 
+/*
+ * Some systems do not have legacy ISA devices.
+ * /dev/port is not a valid interface on these systems.
+ * So for those archs, <asm/io.h> should define the following symbol.
+ */
+#ifndef arch_has_dev_port
+#define arch_has_dev_port()     (1)
+#endif
+
 #endif /* _LINUX_IO_H */