| Message ID | 33057688012c34dd60315ad765ff63f070e98c0c.1605896059.git.gustavoars@kernel.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Fix fall-through warnings for Clang | expand |
On 11/20/20 1:32 PM, Gustavo A. R. Silva wrote: > In preparation to enable -Wimplicit-fallthrough for Clang, fix a warning > by explicitly adding a break statement instead of letting the code fall > through to the next case. > > Link: https://github.com/KSPP/linux/issues/115 > Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> > --- > drivers/block/xen-blkfront.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c > index 48629d3433b4..34b028be78ab 100644 > --- a/drivers/block/xen-blkfront.c > +++ b/drivers/block/xen-blkfront.c > @@ -2462,6 +2462,7 @@ static void blkback_changed(struct xenbus_device *dev, > break; > if (talk_to_blkback(dev, info)) > break; > + break; > case XenbusStateInitialising: > case XenbusStateInitialised: > case XenbusStateReconfiguring: Reviewed-by Boris Ostrovsky <boris.ostrovsky@oracle.com> (for patch 138 as well) Although I thought using 'fallthrough' attribute was the more common approach. -boris
On Fri, Nov 20, 2020 at 12:32:58PM -0600, Gustavo A. R. Silva wrote: > In preparation to enable -Wimplicit-fallthrough for Clang, fix a warning > by explicitly adding a break statement instead of letting the code fall > through to the next case. > > Link: https://github.com/KSPP/linux/issues/115 > Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> > --- > drivers/block/xen-blkfront.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c > index 48629d3433b4..34b028be78ab 100644 > --- a/drivers/block/xen-blkfront.c > +++ b/drivers/block/xen-blkfront.c > @@ -2462,6 +2462,7 @@ static void blkback_changed(struct xenbus_device *dev, > break; > if (talk_to_blkback(dev, info)) > break; > + break; I would have added a fallthrough like it's done below in XenbusStateClosed. Also, FWIW, I think clang's fallthrough warnings are a bit too verbose. Falling through to a break like the case here shouldn't cause a warning IMO, falling through to anything != break should indeed cause those warnings to appear. Thanks, Roger.
On Fri, Nov 20, 2020 at 04:36:26PM -0500, boris.ostrovsky@oracle.com wrote: > > On 11/20/20 1:32 PM, Gustavo A. R. Silva wrote: > > In preparation to enable -Wimplicit-fallthrough for Clang, fix a warning > > by explicitly adding a break statement instead of letting the code fall > > through to the next case. > > > > Link: https://github.com/KSPP/linux/issues/115 > > Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> > > --- > > drivers/block/xen-blkfront.c | 1 + > > 1 file changed, 1 insertion(+) > > > > diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c > > index 48629d3433b4..34b028be78ab 100644 > > --- a/drivers/block/xen-blkfront.c > > +++ b/drivers/block/xen-blkfront.c > > @@ -2462,6 +2462,7 @@ static void blkback_changed(struct xenbus_device *dev, > > break; > > if (talk_to_blkback(dev, info)) > > break; > > + break; > > case XenbusStateInitialising: > > case XenbusStateInitialised: > > case XenbusStateReconfiguring: > > > Reviewed-by Boris Ostrovsky <boris.ostrovsky@oracle.com> > > > (for patch 138 as well) Thank you for both reviews, Boris. > Although I thought using 'fallthrough' attribute was the more common approach. I've got it. I will consider that for a future patch. Thanks -- Gustavo
On 20.11.20 19:32, Gustavo A. R. Silva wrote: > In preparation to enable -Wimplicit-fallthrough for Clang, fix a warning > by explicitly adding a break statement instead of letting the code fall > through to the next case. > > Link: https://github.com/KSPP/linux/issues/115 > Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Applied to: xen/tip.git for-linus-5.11 Juergen
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c index 48629d3433b4..34b028be78ab 100644 --- a/drivers/block/xen-blkfront.c +++ b/drivers/block/xen-blkfront.c @@ -2462,6 +2462,7 @@ static void blkback_changed(struct xenbus_device *dev, break; if (talk_to_blkback(dev, info)) break; + break; case XenbusStateInitialising: case XenbusStateInitialised: case XenbusStateReconfiguring:
In preparation to enable -Wimplicit-fallthrough for Clang, fix a warning by explicitly adding a break statement instead of letting the code fall through to the next case. Link: https://github.com/KSPP/linux/issues/115 Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> --- drivers/block/xen-blkfront.c | 1 + 1 file changed, 1 insertion(+)