From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [lkp-robot] [bpf] de05014aba:
 BUG:sleeping_function_called_from_invalid_context_at_mm/slab.h
Date: Mon, 15 May 2017 14:57:25 -0400 (EDT)
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From: kernel test robot <xiaolong.ye@intel.com>
Date: Mon, 15 May 2017 16:14:38 +0800

> commit: de05014aba8054e1353b720b814a0cd8ea7594e5 ("bpf: Introduce bpf_prog ID")
> url: https://github.com/0day-ci/linux/commits/Martin-KaFai-Lau/bpf-Introduce-bpf_prog-ID/20170428-025859

Indeed, we can't use GFP_USER in the call to idr_alloc_cyclic() if it is
going to run with the prog_idr_lock spinlock held.