On Fri, Sep 28, 2018 at 03:20:23PM -0600, Jason Gunthorpe wrote:
> The zap_vma_ptes() is declared but not defined on NOMMU kernels, causing a
> link error for the newly added uverbs code:
>
> drivers/infiniband/core/uverbs_main.o: In function `uverbs_user_mmap_disassociate':
> uverbs_main.c:(.text+0x114c): undefined reference to `zap_vma_ptes'
> drivers/infiniband/core/uverbs_main.o: In function `rdma_umap_open':
> uverbs_main.c:(.text+0x53c): undefined reference to `zap_vma_ptes'
>
> Since all user access for all of our drivers depend on remapping pages to
> user space disable USER_ACCESS when there is no mmu.
>
> Fixes: 5f9794dc94f5 ("RDMA/ucontext: Add a core API for mmaping driver IO memory")
> Reported-by: Arnd Bergmann <arnd@xxxxxxxx>
> Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
> ---
> drivers/infiniband/Kconfig | 1 +
> 1 file changed, 1 insertion(+)
>
> Here is the revised version of Arnd's earlier patch, as requested.
Applied to for-next
Jason
