On Mon, 9 Sep 2024 13:53:20 +0000 Arnd Bergmann <a...@kernel.org> wrote:
> From: Arnd Bergmann <a...@arndb.de> > > The definition was previously moved into an #ifdef block by > accident and now causes a build failure when CONFIG_TIMERLAT_TRACER > is disabled: > > In file included from include/linux/seqlock.h:19, > from kernel/trace/trace_osnoise.c:20: > kernel/trace/trace_osnoise.c: In function 'osnoise_sleep': > kernel/trace/trace_osnoise.c:1631:21: error: 'interface_lock' undeclared > (first use in this function); did you mean 'trace_clock'? > 1631 | mutex_lock(&interface_lock); > | ^~~~~~~~~~~~~~ > > Move it up some more to be outside of that #ifdef again. Thanks, but for some reason I never got your email. I only noticed this from Patchwork, and I'm replying via lore. I also fixed it due to someone else reporting the bug. I'm currently running mine through my tests, although it is the exact same change as yours. https://lore.kernel.org/linux-trace-kernel/20240909103231.23a28...@gandalf.local.home/ -- Steve > > Fixes: e6a53481da29 ("tracing/timerlat: Only clear timer if a kthread exists") > Signed-off-by: Arnd Bergmann <a...@arndb.de> > --- > It looks like the regression already made it into 6.11-rc7 as > part of > https://lore.kernel.org/lkml/20240905172827.6a64c...@gandalf.local.home/ > so this fixup (if correct) is needed for 6.11 as well > --- > kernel/trace/trace_osnoise.c | 10 +++++----- > 1 file changed, 5 insertions(+), 5 deletions(-) > > diff --git a/kernel/trace/trace_osnoise.c b/kernel/trace/trace_osnoise.c > index 20c6660762a3..acfd57689af6 100644 > --- a/kernel/trace/trace_osnoise.c > +++ b/kernel/trace/trace_osnoise.c > @@ -228,6 +228,11 @@ static inline struct osnoise_variables > *this_cpu_osn_var(void) > return this_cpu_ptr(&per_cpu_osnoise_var); > } > > +/* > + * Protect the interface. > + */ > +static struct mutex interface_lock; > + > #ifdef CONFIG_TIMERLAT_TRACER > /* > * Runtime information for the timer mode. > @@ -252,11 +257,6 @@ static inline struct timerlat_variables > *this_cpu_tmr_var(void) > return this_cpu_ptr(&per_cpu_timerlat_var); > } > > -/* > - * Protect the interface. > - */ > -static struct mutex interface_lock; > - > /* > * tlat_var_reset - Reset the values of the given timerlat_variables > */
