On Fri, Nov 13, 2020 at 03:02:17PM +0100, Thomas Gleixner wrote: > -#define irq_count() (preempt_count() & (HARDIRQ_MASK | SOFTIRQ_MASK \ > - | NMI_MASK)) > +#define irq_count() (nmi_count() | hardirq_count() | softirq_count())
> +#define in_task() (!(in_nmi() | in_hardirq() | > in_serving_softirq())) > -#define in_task() (!(preempt_count() & \ > - (NMI_MASK | HARDIRQ_MASK | SOFTIRQ_OFFSET))) How horrible is the code-gen? Because preempt_count() is raw_cpu_read_4() and at least some old compilers will refuse to CSE it (consider the this_cpu_read_stable mess).
