The process of "seq_file" lacks some descriptions

[jouae]

7.4 The seq_file is missing the behavior that occurs when it directly returns NULL after the start step. Also, in the flowchart, the first decision where return is NULL is yes points to nothing, which is not defined in ISO 5807.

ISO 5807 section 10.3.1.2 states decision, "Each exit from a symbol be accompanied by the appropriate condition values to show the logic path which it represents, so that the conditions and the associated references are identified."

The behavior of pointing to nothing does not have associated references and does not indicate the relation of this logic path.

My suggestions are:
1. Add a description of this behavior: "If the return is a non-NULL value, the function next() is called; otherwise, the stop() function is called directly."
2. Additionally, in the flowchart, the yes logic path of the first decision should point to the stop() treatment.

Refs:
7.4 Manage /proc file with seq_file
ISO-5807-1985

[jouae]

Closed see commit #262