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Al Viro authored
A side effect worth noting: in O_APPEND case we set ->ki_pos early, so if it turns out to be an error or a zero-length write, we'll end up with ->ki_pos modified. Safe, since all callers never look at the ->ki_pos after the call of __generic_file_write_iter() returning non-positive, all the way to caller of ->write_iter() and those discard ->ki_pos when getting that. Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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