Re: lib/mpi: BUG: sleeping function called from invalid context on next-20160726

From	Nicolai Stange <nicstange@gmail.com>
Newsgroups	linux.kernel
Subject	Re: lib/mpi: BUG: sleeping function called from invalid context on next-20160726
Date	2016-07-28 09:50 +0200
Message-ID	<rZOeR-36k-7@gated-at.bofh.it> (permalink)
References	<rZEfw-4Gp-7@gated-at.bofh.it> <rZM3n-1IS-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Herbert Xu <herbert@gondor.apana.org.au> writes:

> On Wed, Jul 27, 2016 at 11:05:05PM +0200, Nicolai Stange wrote:
>> 
>> with linux-next-20160726, I get this:
>> 
>>  BUG: sleeping function called from invalid context at /mnt/scratch/nic/linux-next/mm/slab.h:388
>
> Does this patch help?

Yes, works like a charm now!


>> I would have sent a patch, but there is another point which puzzles me
>> in mpi_read_raw_from_sgl():
>> 
>>   [...]
>>   const u8 *buff;
>>   [...]
>>   sg_miter_start(&miter, sgl, ents, SG_MITER_ATOMIC | SG_MITER_FROM_SG);
>> 
>>   lzeros = 0;
>>   len = 0;
>>   while (nbytes > 0) {
>>   	while (len && !*buff) {
>>   		lzeros++;
>>   		len--;
>>   		buff++;
>>   	}
>> 
>> 
>> Thus, buff isn't initialized before its first use? Or am I misreading
>> something here?
>
> On the first entry len is zero therefore we will go to the end of the
> loop and initialise buff.

Hah! Thanks, although being obvious, I didn't see this...


Thanks,

Nicolai

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lib/mpi: BUG: sleeping function called from invalid context on next-20160726 Nicolai Stange <nicstange@gmail.com> - 2016-07-27 23:10 +0200
  Re: lib/mpi: BUG: sleeping function called from invalid context on  next-20160726 Herbert Xu <herbert@gondor.apana.org.au> - 2016-07-28 07:30 +0200
    Re: lib/mpi: BUG: sleeping function called from invalid context on next-20160726 Nicolai Stange <nicstange@gmail.com> - 2016-07-28 09:50 +0200

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