On Fri, 8 Dec 2023 15:16:10 +0100 Alexander Potapenko <glider@xxxxxxxxxx> wrote: > On Tue, Nov 21, 2023 at 11:02 PM Ilya Leoshkevich <iii@xxxxxxxxxxxxx> wrote: > > > > Architectures use assembly code to initialize ftrace_regs and call > > ftrace_ops_list_func(). Therefore, from the KMSAN's point of view, > > ftrace_regs is poisoned on ftrace_ops_list_func entry(). This causes > > KMSAN warnings when running the ftrace testsuite. > > I couldn't reproduce these warnings on x86, hope you really need this > change on s390 :) On x86, ftrace_regs sits on the stack. And IIUC, s390 doesn't have the same concept of a "stack" as other architectures. Perhaps that's the reason s390 needs this? -- Steve
