[Bug 241728] linuxkpi: panics after loading radeonkms kernel module (data storage interrupt trap)

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=241728

--- Comment #4 from Hans Petter Selasky <hselasky at FreeBSD.org> ---
The piece of code you reference, line 118 in
sys/compat/linuxkpi/common/src/linux_idr.c, should not be run during kldload.
It is part of a SYSUNINIT():


SYSUNINIT(idr_preload_uninit, SI_SUB_LOCK, SI_ORDER_FIRST, idr_preload_uninit,
N

In this function, try to add a printf:

static void
idr_preload_init(void *arg)
{
        int cpu;

        CPU_FOREACH(cpu) {
                struct linux_idr_cache *lic =
                    DPCPU_ID_PTR(cpu, linux_idr_cache);

printf("CPU=%d LIC=%p\n", cpu, lic);

                spin_lock_init(&lic->lock);
        }
}
SYSINIT(idr_preload_init, SI_SUB_CPU, SI_ORDER_ANY, idr_preload_init, NULL);

--HPS

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