Subject: linux-next: build failure after merge of the hmm tree

From: Stephen Rothwell <[email-masked]>
Date: Thu, 14 Nov 2019 16:34:35 +1100

Hi all,

After merging the hmm tree, today's linux-next build (x86_64 allmodconfig)
failed like this:

drivers/infiniband/hw/hfi1/user_exp_rcv.c: In function 'set_rcvarray_entry':
drivers/infiniband/hw/hfi1/user_exp_rcv.c:768:33: warning: passing argument 2 of 'mmu_interval_notifier_insert' makes pointer from integer without a cast [-Wint-conversion]
  768 |    &node->notifier, tbuf->vaddr + (pageidx * PAGE_SIZE),
      |                     ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
      |                                 |
      |                                 long unsigned int
In file included from include/rdma/ib_verbs.h:59,
                 from include/rdma/ib_hdrs.h:53,
                 from drivers/infiniband/hw/hfi1/hfi.h:68,
                 from drivers/infiniband/hw/hfi1/mmu_rb.h:50,
                 from drivers/infiniband/hw/hfi1/user_exp_rcv.c:50:
include/linux/mmu_notifier.h:295:24: note: expected 'struct mm_struct *' but argument is of type 'long unsigned int'
  295 |      struct mm_struct *mm, unsigned long start,
      |      ~~~~~~~~~~~~~~~~~~^~
drivers/infiniband/hw/hfi1/user_exp_rcv.c:769:26: warning: passing argument 4 of 'mmu_interval_notifier_insert' makes integer from pointer without a cast [-Wint-conversion]
  769 |    npages * PAGE_SIZE, fd->mm);
      |                        ~~^~~~
      |                          |
      |                          struct mm_struct *
In file included from include/rdma/ib_verbs.h:59,
                 from include/rdma/ib_hdrs.h:53,
                 from drivers/infiniband/hw/hfi1/hfi.h:68,
                 from drivers/infiniband/hw/hfi1/mmu_rb.h:50,
                 from drivers/infiniband/hw/hfi1/user_exp_rcv.c:50:
include/linux/mmu_notifier.h:296:20: note: expected 'long unsigned int' but argument is of type 'struct mm_struct *'
  296 |      unsigned long length,
      |      ~~~~~~~~~~~~~~^~~~~~
drivers/infiniband/hw/hfi1/user_exp_rcv.c:767:9: error: too few arguments to function 'mmu_interval_notifier_insert'
  767 |   ret = mmu_interval_notifier_insert(
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from include/rdma/ib_verbs.h:59,
                 from include/rdma/ib_hdrs.h:53,
                 from drivers/infiniband/hw/hfi1/hfi.h:68,
                 from drivers/infiniband/hw/hfi1/mmu_rb.h:50,
                 from drivers/infiniband/hw/hfi1/user_exp_rcv.c:50:
include/linux/mmu_notifier.h:294:5: note: declared here
  294 | int mmu_interval_notifier_insert(struct mmu_interval_notifier *mni,
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Caused by commit

  c90dad714405 ("RDMA/hfi1: Use mmu_interval_notifier_insert for user_exp_rcv")

I have used the hmm tree from next-20191113 for today.

-- 
Cheers,
Stephen Rothwell