From fefcfb9935be0208ff522563239f11a04f98c27d Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Fri, 21 Jul 2017 18:17:45 +0200 Subject: [PATCH] xen/pvcalls: use WARN_ON(1) instead of __WARN() __WARN() is an internal helper that is only available on some architectures, but causes a build error e.g. on ARM64 in some configurations: drivers/xen/pvcalls-back.c: In function 'set_backend_state': drivers/xen/pvcalls-back.c:1097:5: error: implicit declaration of function '__WARN' [-Werror=implicit-function-declaration] Unfortunately, there is no equivalent of BUG() that takes no arguments, but WARN_ON(1) is commonly used in other drivers and works on all configurations. Fixes: 7160378206b2 ("xen/pvcalls: xenbus state handling") Signed-off-by: Arnd Bergmann Reviewed-by: Stefano Stabellini Signed-off-by: Boris Ostrovsky --- drivers/xen/pvcalls-back.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/xen/pvcalls-back.c b/drivers/xen/pvcalls-back.c index 3201a0c..b209cd4 100644 --- a/drivers/xen/pvcalls-back.c +++ b/drivers/xen/pvcalls-back.c @@ -1098,7 +1098,7 @@ static void set_backend_state(struct xenbus_device *dev, xenbus_switch_state(dev, XenbusStateClosing); break; default: - __WARN(); + WARN_ON(1); } break; case XenbusStateInitWait: @@ -1113,7 +1113,7 @@ static void set_backend_state(struct xenbus_device *dev, xenbus_switch_state(dev, XenbusStateClosing); break; default: - __WARN(); + WARN_ON(1); } break; case XenbusStateConnected: @@ -1127,7 +1127,7 @@ static void set_backend_state(struct xenbus_device *dev, xenbus_switch_state(dev, XenbusStateClosing); break; default: - __WARN(); + WARN_ON(1); } break; case XenbusStateClosing: @@ -1138,11 +1138,11 @@ static void set_backend_state(struct xenbus_device *dev, xenbus_switch_state(dev, XenbusStateClosed); break; default: - __WARN(); + WARN_ON(1); } break; default: - __WARN(); + WARN_ON(1); } } } -- 2.7.4