Messages in this thread | | | Date | Thu, 12 Nov 2015 09:47:39 -0500 | From | Steven Rostedt <> | Subject | Re: [PATCH] sched/rt: hide push_irq_work_func declaration |
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On Thu, 12 Nov 2015 15:22:22 +0100 Arnd Bergmann <arnd@arndb.de> wrote:
> The push_irq_work_func() function is conditionally defined only > when both CONFIG_SMP and HAVE_RT_PUSH_IPI are defined, but the > forward declaration remains visibile without HAVE_RT_PUSH_IPI, > causing a gcc warning in ARM64 allnoconfig: > > kernel/sched/rt.c:68:13: warning: 'push_irq_work_func' declared 'static' but never defined [-Wunused-function] > > This changes the code to use the same condition for both the > declaration and the function definition, which gets rid of the > warning. > > Signed-off-by: Arnd Bergmann <arnd@arndb.de> > Fixes: b6366f048e0c ("sched/rt: Use IPI to trigger RT task push migration instead of pulling") > --- > Found on arm64 allnoconfig > > diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c > index e3cc16312046..ce7b36d6f477 100644 > --- a/kernel/sched/rt.c > +++ b/kernel/sched/rt.c > @@ -64,7 +64,7 @@ static void start_rt_bandwidth(struct rt_bandwidth *rt_b) > raw_spin_unlock(&rt_b->rt_runtime_lock); > } > > -#ifdef CONFIG_SMP > +#if IS_ENABLED(CONFIG_SMP) && defined(HAVE_RT_PUSH_IPI)
Why IS_ENABLED() and not defined()?
#if defined(CONFIG_SMP) && defined(HAVE_RT_PUSH_IPI)
I thought IS_ENABLED() is used for C code, like:
if (IS_ENABLED(CONFIG_SMP)) { [...] }
-- Steve
> static void push_irq_work_func(struct irq_work *work); > #endif >
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