| Message ID | 20170721161757.3336844-1-arnd@arndb.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 07/21/2017 12:17 PM, Arnd Bergmann wrote: > __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 <arnd@arndb.de> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
On Fri, 21 Jul 2017, Arnd Bergmann wrote: > __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 <arnd@arndb.de> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org> > --- > 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 d6c4c4aecb41..00c1a2344330 100644 > --- a/drivers/xen/pvcalls-back.c > +++ b/drivers/xen/pvcalls-back.c > @@ -1094,7 +1094,7 @@ static void set_backend_state(struct xenbus_device *dev, > xenbus_switch_state(dev, XenbusStateClosing); > break; > default: > - __WARN(); > + WARN_ON(1); > } > break; > case XenbusStateInitWait: > @@ -1109,7 +1109,7 @@ static void set_backend_state(struct xenbus_device *dev, > xenbus_switch_state(dev, XenbusStateClosing); > break; > default: > - __WARN(); > + WARN_ON(1); > } > break; > case XenbusStateConnected: > @@ -1123,7 +1123,7 @@ static void set_backend_state(struct xenbus_device *dev, > xenbus_switch_state(dev, XenbusStateClosing); > break; > default: > - __WARN(); > + WARN_ON(1); > } > break; > case XenbusStateClosing: > @@ -1134,11 +1134,11 @@ 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); > } > } > } > -- > 2.9.0 >
On 07/21/2017 03:26 PM, Stefano Stabellini wrote: > On Fri, 21 Jul 2017, Arnd Bergmann wrote: >> __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 <arnd@arndb.de> > Reviewed-by: Stefano Stabellini <sstabellini@kernel.org> > Applied to for-linus-4.14 -boris
diff --git a/drivers/xen/pvcalls-back.c b/drivers/xen/pvcalls-back.c index d6c4c4aecb41..00c1a2344330 100644 --- a/drivers/xen/pvcalls-back.c +++ b/drivers/xen/pvcalls-back.c @@ -1094,7 +1094,7 @@ static void set_backend_state(struct xenbus_device *dev, xenbus_switch_state(dev, XenbusStateClosing); break; default: - __WARN(); + WARN_ON(1); } break; case XenbusStateInitWait: @@ -1109,7 +1109,7 @@ static void set_backend_state(struct xenbus_device *dev, xenbus_switch_state(dev, XenbusStateClosing); break; default: - __WARN(); + WARN_ON(1); } break; case XenbusStateConnected: @@ -1123,7 +1123,7 @@ static void set_backend_state(struct xenbus_device *dev, xenbus_switch_state(dev, XenbusStateClosing); break; default: - __WARN(); + WARN_ON(1); } break; case XenbusStateClosing: @@ -1134,11 +1134,11 @@ 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); } } }
__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 <arnd@arndb.de> --- drivers/xen/pvcalls-back.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)