linux-kernel - Re: linux-next: build failure after merge of the scsi tree

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Date:   Mon, 13 Feb 2017 09:18:54 -0700
From:   Jens Axboe <axboe@...nel.dk>
To:     Stephen Rothwell <sfr@...b.auug.org.au>,
        James Bottomley <James.Bottomley@...senPartnership.com>
Cc:     linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
        Ram Pai <linuxram@...ibm.com>, Christoph Hellwig <hch@....de>
Subject: Re: linux-next: build failure after merge of the scsi tree

On 02/12/2017 05:32 PM, Stephen Rothwell wrote:
> Hi all,
> 
> On Mon, 6 Feb 2017 16:04:51 +1100 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>>
>> After merging the scsi tree, today's linux-next build (powerpc
>> ppc64_defconfig) failed like this:
>>
>> In file included from include/uapi/linux/stddef.h:1:0,
>>                  from include/linux/stddef.h:4,
>>                  from include/uapi/linux/posix_types.h:4,
>>                  from include/uapi/linux/types.h:13,
>>                  from include/linux/types.h:5,
>>                  from include/linux/list.h:4,
>>                  from include/linux/module.h:9,
>>                  from drivers/scsi/mpt3sas/mpt3sas_scsih.c:45:
>> drivers/scsi/mpt3sas/mpt3sas_scsih.c: In function '_scsih_io_done':
>> drivers/scsi/mpt3sas/mpt3sas_scsih.c:4750:28: error: 'struct request' has no member named 'cmd_type'
>>   if (unlikely(scmd->request->cmd_type == REQ_TYPE_FS && sector_sz &&
>>                             ^
>> include/linux/compiler.h:179:42: note: in definition of macro 'unlikely'
>>  # define unlikely(x) __builtin_expect(!!(x), 0)
>>                                           ^
>> drivers/scsi/mpt3sas/mpt3sas_scsih.c:4750:42: error: 'REQ_TYPE_FS' undeclared (first use in this function)
>>   if (unlikely(scmd->request->cmd_type == REQ_TYPE_FS && sector_sz &&
>>                                           ^
>> include/linux/compiler.h:179:42: note: in definition of macro 'unlikely'
>>  # define unlikely(x) __builtin_expect(!!(x), 0)
>>                                           ^
>> drivers/scsi/mpt3sas/mpt3sas_scsih.c:4750:42: note: each undeclared identifier is reported only once for each function it appears in
>>   if (unlikely(scmd->request->cmd_type == REQ_TYPE_FS && sector_sz &&
>>                                           ^
>> include/linux/compiler.h:179:42: note: in definition of macro 'unlikely'
>>  # define unlikely(x) __builtin_expect(!!(x), 0)
>>                                           ^
>>
>> Caused by commit
>>
>>   f2e767bb5d6e ("scsi: mpt3sas: Force request partial completion alignment")
>>
>> interacting with commit
>>
>>   aebf526b53ae ("block: fold cmd_type into the REQ_OP_ space")
>>
>> from the block tree.
>>
>> I have applied teh following merge fix patch:
>>
>> From: Stephen Rothwell <sfr@...b.auug.org.au>
>> Date: Mon, 6 Feb 2017 16:00:54 +1100
>> Subject: [PATCH] scsi: mpt3sas: fix up for "block: fold cmd_type into the
>>  REQ_OP_ space"
>>
>> Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
>> ---
>>  drivers/scsi/mpt3sas/mpt3sas_scsih.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
>> index 5f7b0c7d7e4d..81a64678390d 100644
>> --- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c
>> +++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
>> @@ -4747,7 +4747,7 @@ _scsih_io_done(struct MPT3SAS_ADAPTER *ioc, u16 smid, u8 msix_index, u32 reply)
>>  	 * then scsi-ml does not need to handle this misbehavior.
>>  	 */
>>  	sector_sz = scmd->device->sector_size;
>> -	if (unlikely(scmd->request->cmd_type == REQ_TYPE_FS && sector_sz &&
>> +	if (unlikely(!blk_rq_is_passthrough(scmd->request) && sector_sz &&
>>  		     xfer_cnt % sector_sz)) {
>>  		sdev_printk(KERN_INFO, scmd->device,
>>  		    "unaligned partial completion avoided (xfer_cnt=%u, sector_sz=%u)\n",
>> -- 
>> 2.10.2
> 
> The scsi tree commit has been merged into Linus' tree, so this
> interaction occurs between tyhe block tree and Linus' tree, now.

Thanks Stephen, I'll prepare a merged tree as well for Linus, so we
don't lose this when the block tree is merged for 4.11.

-- 
Jens Axboe