release_region is defined on RHEL6 although request_muxed_region isn't so generates a warning:
warning: "release_region" redefined
Making it conditional eliminates the warning.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
#ifndef request_muxed_region
#define request_muxed_region(a, b, c) (true)
#ifndef request_muxed_region
#define request_muxed_region(a, b, c) (true)
+#endif
+#ifndef release_region
#define release_region(a, b)
#endif
#define release_region(a, b)
#endif