[lustre-devel] [PATCH] IB: Revert "remove redundant INFINIBAND kconfig dependencies"
Greg Thelen
gthelen at google.com
Mon May 28 11:02:40 PDT 2018
Jason Gunthorpe <jgg at ziepe.ca> wrote:
> On Fri, May 25, 2018 at 05:32:52PM -0700, Greg Thelen wrote:
>> On Fri, May 25, 2018 at 2:32 PM Arnd Bergmann <arnd at arndb.de> wrote:
>> > Several subsystems depend on INFINIBAND_ADDR_TRANS, which in turn
>> depends
>> > on INFINIBAND. However, when with CONFIG_INIFIBAND=m, this leads to a
>> > link error when another driver using it is built-in. The
>> > INFINIBAND_ADDR_TRANS dependency is insufficient here as this is
>> > a 'bool' symbol that does not force anything to be a module in turn.
>> > fs/cifs/smbdirect.o: In function `smbd_disconnect_rdma_work':
>> > smbdirect.c:(.text+0x1e4): undefined reference to `rdma_disconnect'
>> > net/9p/trans_rdma.o: In function `rdma_request':
>> > trans_rdma.c:(.text+0x7bc): undefined reference to `rdma_disconnect'
>> > net/9p/trans_rdma.o: In function `rdma_destroy_trans':
>> > trans_rdma.c:(.text+0x830): undefined reference to `ib_destroy_qp'
>> > trans_rdma.c:(.text+0x858): undefined reference to `ib_dealloc_pd'
>> > Fixes: 9533b292a7ac ("IB: remove redundant INFINIBAND kconfig
>> dependencies")
>> > Signed-off-by: Arnd Bergmann <arnd at arndb.de>
>> Acked-by: Greg Thelen <gthelen at google.com>
>> Sorry for the 9533b292a7ac problem.
>> At this point the in release cycle, I think Arnd's revert is best.
>> If there is interest, I've put a little thought into an alternative fix:
>> making INFINIBAND_ADDR_TRANS tristate. But it's nontrivial.
>> So I prefer this simple revert for now.
> Is that a normal thing to do?
For me: no, it's not normal. In my use case I merely want to disable
INFINIBAND_ADDR_TRANS while continuing to use INFINIBAND. This is
supported with f7cb7b85be55 ("IB: make INFINIBAND_ADDR_TRANS
configurable").
During f7cb7b85be55 development https://lkml.org/lkml/2018/4/30/1073
suggested that we drop dependency on both INFINIBAND and
INFINIBAND_ADDR_TRANS. Thus 9533b292a7ac ("IB: remove redundant
INFINIBAND kconfig dependencies").
But 9533b292a7ac led to the randconfig build errors reported and thus
("IB: Revert "remove redundant INFINIBAND kconfig dependencies"").
So I see no need to do anything more than apply ("IB: Revert "remove
redundant INFINIBAND kconfig dependencies"").
>> Doug: do you need anything from me on this?
> I can take the revert..
> Jason
Thanks.
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