Hi Bruce, This patch from upstream can fix the following warning in kernel v5.15 for x86. Though LKDTM is only used for testing and this issuse is not serious, it is nice to fix.
Could you please help to merge? root@intel-x86-64:~# insmod lkdtm.ko ------------[ cut here ]------------ missing return thunk: 0xffffffffc03ee5b0-0xffffffffc03ee5b5: e9 00 00 00 00 WARNING: CPU: 5 PID: 643 at arch/x86/kernel/alternative.c:557 apply_returns+0x1c1/0x1f0 Modules linked in: CPU: 5 PID: 643 Comm: insmod Not tainted 5.15.58-yocto-standard+ #1 Hardware name: Supermicro SYS-5019A-FTN4/A2SDi-8C-HLN4F, BIOS 1.1c 06/25/2019 RIP: 0010:apply_returns+0x1c1/0x1f0 Call Trace: <TASK> ? apply_retpolines+0x61/0x140 ? __this_cpu_preempt_check+0x20/0x20 module_finalize+0x131/0x190 load_module+0x4ee/0x870 __do_sys_finit_module+0xb5/0x100 __x64_sys_finit_module+0x18/0x20 do_syscall_64+0x43/0x90 entry_SYSCALL_64_after_hwframe+0x61/0xcb Thanks, Yongxin
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