On Wed, Mar 6, 2019 at 3:56 PM Peter Zijlstra <[email protected]> wrote: > > On Wed, Mar 06, 2019 at 03:40:51PM +0100, Dmitry Vyukov wrote: > > On Wed, Mar 6, 2019 at 3:34 PM Peter Zijlstra <[email protected]> wrote: > > > > mm/kasan/generic_report.o: warning: objtool: > > > __asan_report_load1_noabort()+0x0: call to __fentry__() with UACCESS > > > enabled > > > But if it makes things simpler for the objtool, then I think we can > > disable function tracer for generic_report.c too. > > It's not simpler; it is actually a correctness issue. Those functions > must not call into the tracer with AC=1
You are right! I assumed they are defined in kasan.c and then call into a report function that is compiled with -pg. We can either disable -pg for report.c, or move these callbacks into kasan.c which already has -pg disabled. I don't have strong preference either way as long as the option works in all cases.
