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a02a765bd5
Instead of passing opt_size address to mptcp_established_options(), change this function to return it by value. This removes the need for an expensive stack canary in tcp_established_options() when CONFIG_STACKPROTECTOR_STRONG=y. $ scripts/bloat-o-meter -t vmlinux.old vmlinux.new add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-92 (-92) Function old new delta tcp_options_write.isra 1423 1407 -16 mptcp_established_options 2746 2720 -26 tcp_established_options 553 503 -50 Total: Before=22110750, After=22110658, chg -0.00% Signed-off-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Matthieu Baerts (NGI0) <matttbe@kernel.org> Link: https://patch.msgid.link/20260602125138.2317015-1-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>