On Wed, Feb 12, 2020 at 09:25:39AM -0500, Steven Rostedt wrote: > On Wed, 12 Feb 2020 10:32:15 +0100 > Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote: > > > Because do_nmi() must not call into tracing outside of > > nmi_enter()/nmi_exit(), these functions must be notrace. > > > > Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> > > --- > > arch/x86/kernel/cpu/common.c | 4 ++-- > > arch/x86/kernel/nmi.c | 6 ++++++ > > 2 files changed, 8 insertions(+), 2 deletions(-) > > > > --- a/arch/x86/kernel/cpu/common.c > > +++ b/arch/x86/kernel/cpu/common.c > > This entire file is notrace: > > arch/x86/kernel/cpu/Makefile: > > CFLAGS_REMOVE_common.o = -pg Urgh, I hate it that that annotation is so hard to find :/ Also, there seem to be various flavours of that Makefile magic around. CFLAGS_REMOVE_lockdep.o = $(CC_FLAGS_FTRACE) is another variant I encountered.
