grub-dev: Comments
2.6 Comments
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All comments shall be C-style comments, of the form '/* ... */'. A
comment can be placed immediately preceding the entity it describes or
it can be placed together with code, variable declarations, or other
non-comment entities. However, it is recommended to not mix various
forms especially in types/structs descriptions.
Acceptable:
/* The page # that is the front buffer. */
int displayed_page;
int render_page; /* The page # that is the back buffer. */