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rbd: silence bogus uninitialized warning in rbd_object_map_update_finish() 

Some versions of gcc (so far 6.3 and 7.4) throw a warning:

  drivers/block/rbd.c: In function 'rbd_object_map_callback':
  drivers/block/rbd.c:2124:21: warning: 'current_state' may be used uninitialized in this function [-Wmaybe-uninitialized]
        (current_state == OBJECT_EXISTS && state == OBJECT_EXISTS_CLEAN))
  drivers/block/rbd.c:2092:23: note: 'current_state' was declared here
    u8 state, new_state, current_state;
                          ^~~~~~~~~~~~~

It's bogus because all current_state accesses are guarded by
has_current_state.

Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Dongsheng Yang <dongsheng.yang@easystack.cn>
This commit is contained in:
Ilya Dryomov 2019-11-13 12:07:15 +01:00
parent 6a81749ebe
commit 633739b2fe
1 changed files with 1 additions and 1 deletions
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2
drivers/block/rbd.c
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@ -2087,7 +2087,7 @@ static int rbd_object_map_update_finish(struct rbd_obj_request *obj_req,
struct rbd_device *rbd_dev = obj_req->img_request->rbd_dev;
struct ceph_osd_data *osd_data;
u64 objno;
u8 state, new_state, current_state;
u8 state, new_state, uninitialized_var(current_state);
bool has_current_state;
void *p;