8f0e8597a7
The nfit_intel_shutdown_status() function has a __weak defintion in nfit.c and an override in acpi_nfit_test.c for testing purposes. This works without an extern declaration, but causes a W=1 build warning: drivers/acpi/nfit/core.c:1717:13: error: no previous prototype for 'nfit_intel_shutdown_status' [-Werror=missing-prototypes] Add a declaration in a header that gets included from both sides to shut up the warning and ensure that the prototypes actually match. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>