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-rw-r--r--include/linux/fs.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 4b86f806014c..49d8eb7a71be 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -886,6 +886,12 @@ static inline int file_check_writeable(struct file *filp)
#define FL_SLEEP 128 /* A blocking lock */
/*
+ * Special return value from posix_lock_file() and vfs_lock_file() for
+ * asynchronous locking.
+ */
+#define FILE_LOCK_DEFERRED 1
+
+/*
* The POSIX file lock owner is determined by
* the "struct files_struct" in the thread group
* (or NULL for no owner - BSD locks).

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