• Jason Gunthorpe's avatar
    RDMA: Fix building with CONFIG_MMU=n · 914e5d7d
    Jason Gunthorpe authored
    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: 5f9794dc ("RDMA/ucontext: Add a core API for mmaping driver IO memory")
    Reported-by: 's avatarArnd Bergmann <arnd@arndb.de>
    Signed-off-by: 's avatarJason Gunthorpe <jgg@mellanox.com>
    914e5d7d
Kconfig 3.96 KB