preempt_sched: use sa_sigaction for SA_SIGINFO#27

Charlie-Tsai1123 wants to merge 1 commit into

sysprog21:mastersysprog21/concurrent-programs:masterfrom

Charlie-Tsai1123:fix-sigaction-handlerCharlie-Tsai1123/concurrent-programs:fix-sigaction-handlerCopy head branch name to clipboard