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| author | James Morris <james.morris@microsoft.com> | 2019-01-10 11:41:59 -0800 |
|---|---|---|
| committer | James Morris <james.morris@microsoft.com> | 2019-01-10 11:41:59 -0800 |
| commit | 49e41801b335f64610bbfd23e8f2bbaf34d46276 (patch) | |
| tree | 4fbedacd1de1bbd4054f07f93031aebcb7b7a919 /include/linux/backing-dev-defs.h | |
| parent | b49d564344f773d8afee982153c8493e5f2eaf38 (diff) | |
| parent | bfeffd155283772bbe78c6a05dec7c0128ee500c (diff) | |
Merge tag 'v5.0-rc1' into next-general
Linux 5.0-rc1
Sync to pick up LSM stacking work (which is based on -rc1).
Diffstat (limited to 'include/linux/backing-dev-defs.h')
| -rw-r--r-- | include/linux/backing-dev-defs.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/backing-dev-defs.h b/include/linux/backing-dev-defs.h index 9a6bc0951cfa..c31157135598 100644 --- a/include/linux/backing-dev-defs.h +++ b/include/linux/backing-dev-defs.h @@ -258,6 +258,14 @@ static inline void wb_get(struct bdi_writeback *wb) */ static inline void wb_put(struct bdi_writeback *wb) { + if (WARN_ON_ONCE(!wb->bdi)) { + /* + * A driver bug might cause a file to be removed before bdi was + * initialized. + */ + return; + } + if (wb != &wb->bdi->wb) percpu_ref_put(&wb->refcnt); } |