Messages in this thread | | | From | Ilya Dryomov <> | Date | Fri, 22 Mar 2019 15:41:39 +0100 | Subject | Re: [PATCH] ceph: fix clang warning for CEPH_DEFINE_OID_ONSTACK |
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On Fri, Mar 22, 2019 at 3:08 PM Arnd Bergmann <arnd@arndb.de> wrote: > > clang complains about assigning a variable to itself during the > declaration: > > fs/ceph/ioctl.c:187:26: error: variable 'oid' is uninitialized when used within its own initialization [-Werror,-Wuninitialized] > CEPH_DEFINE_OID_ONSTACK(oid); > ^~~ > include/linux/ceph/osdmap.h:122:52: note: expanded from macro 'CEPH_DEFINE_OID_ONSTACK' > struct ceph_object_id oid = CEPH_OID_INIT_ONSTACK(oid) > ~~~ ^~~ > include/linux/ceph/osdmap.h:120:29: note: expanded from macro 'CEPH_OID_INIT_ONSTACK' > ({ ceph_oid_init(&oid); oid; }) > ^~~ > > We use this trick in other places, but it is completely unnecessary > here, as we can just use a regular struct initializer. > > Signed-off-by: Arnd Bergmann <arnd@arndb.de> > --- > include/linux/ceph/osdmap.h | 4 +--- > 1 file changed, 1 insertion(+), 3 deletions(-) > > diff --git a/include/linux/ceph/osdmap.h b/include/linux/ceph/osdmap.h > index 5675b1f09bc5..82f957a7a0d6 100644 > --- a/include/linux/ceph/osdmap.h > +++ b/include/linux/ceph/osdmap.h > @@ -116,10 +116,8 @@ static inline void ceph_oid_init(struct ceph_object_id *oid) > oid->name_len = 0; > } > > -#define CEPH_OID_INIT_ONSTACK(oid) \ > - ({ ceph_oid_init(&oid); oid; }) > #define CEPH_DEFINE_OID_ONSTACK(oid) \ > - struct ceph_object_id oid = CEPH_OID_INIT_ONSTACK(oid) > + struct ceph_object_id oid = { .name = oid.inline_name } > > static inline bool ceph_oid_empty(const struct ceph_object_id *oid) > {
Hi Arnd,
I don't like this because the initialization is no longer contained to ceph_oid_init(). Now there are two things to patch instead of one.
How is this going to be fixed in other places?
Thanks,
Ilya
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