tty: tty_buffer: switch insert functions to size_t
All the functions accept size_t as a size argument. They finally return the same size (or less). It is quite unexpected that they return a signed value and can confuse users to check for negative values. Instead, return the same size_t as accepted to make clear we return values >= 0, where zero in fact means failure. Signed-off-by: "Jiri Slaby (SUSE)" <jirislaby@kernel.org> Link: https://lore.kernel.org/r/20230816105530.3335-6-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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