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-rw-r--r--Documentation/technical/api-lockfile.txt3
1 files changed, 2 insertions, 1 deletions
diff --git a/Documentation/technical/api-lockfile.txt b/Documentation/technical/api-lockfile.txt
index 99830f3bf3..6538610759 100644
--- a/Documentation/technical/api-lockfile.txt
+++ b/Documentation/technical/api-lockfile.txt
@@ -147,7 +147,8 @@ commit_lock_file::
`hold_lock_file_for_append`, close the file descriptor and
rename the lockfile to its final destination. Return 0 upon
success or a negative value on failure to `close(2)` or
- `rename(2)`.
+ `rename(2)`. It is a bug to call `commit_lock_file()` for a
+ `lock_file` object that is not currently locked.
rollback_lock_file::