On Sun, 23 Feb 2014 18:20:26 -0800 Josh Triplett <josh@xxxxxxxxxxxxxxxx> wrote:
> "make allnoconfig" exists to ease testing of minimal configurations.
> Documentation/SubmitChecklist includes a note to test with allnoconfig.
> This helps catch missing dependencies on common-but-not-required
> functionality, which might otherwise go unnoticed.
>
> However, allnoconfig still leaves many symbols enabled, because they're
> hidden behind CONFIG_EMBEDDED or CONFIG_EXPERT. For instance,
> allnoconfig still has CONFIG_PRINTK and CONFIG_BLOCK enabled, so drivers
> don't typically get build-tested with those disabled.
>
> To address this, introduce a new Kconfig option "allnoconfig_y", used on
> symbols which only exist to hide other symbols. Set it on
> CONFIG_EMBEDDED (which then selects CONFIG_EXPERT). allnoconfig will
> then disable all the symbols hidden behind those.
Now look what you've done!
kernel/sched/core.c: In function 'pick_next_task':
kernel/sched/core.c:2613: warning: control reaches end of non-void function
static inline struct task_struct *
pick_next_task(struct rq *rq, struct task_struct *prev)
{
const struct sched_class *class;
struct task_struct *p;
/*
* Optimization: we know that if all tasks are in
* the fair class we can call that function directly:
*/
if (likely(prev->sched_class == &fair_sched_class &&
rq->nr_running == rq->cfs.h_nr_running)) {
p = fair_sched_class.pick_next_task(rq, prev);
if (likely(p))
return p;
}
for_each_class(class) {
p = class->pick_next_task(rq, prev);
if (p)
return p;
}
BUG(); /* the idle class will always have a runnable task */
}
akpm3:/usr/src/25> grep CONFIG_BUG .config
# CONFIG_BUG is not set
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