I found the source of the badness. The backtrace is correct:
uic_init_one
___alloc_bootmem
___alloc_bootmem_nopanic
alloc_arch_preferred_bootmem
In alloc_arch_preferred_bootmem we have:
if (WARN_ON_ONCE(slab_is_available()))
return kzalloc(size, GFP_NOWAIT);
Since the slab is available (it had better be or the call will return
NULL), we get the badness message, then a successful return from
kzalloc.
I believe the author wants something like:
if (slab_is_available())
return kzalloc(size, GFP_NOWAIT);
else
WARN_ON_ONCE(1);
Cheers,
Sean
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