[ Please CC me I am not subscribed to LKML and linux-rdma ] Hi, with CONFIG_INFINIBAND_QIB=m I observe a build-error since Linux v5.13-rc1 release. This is with LLVM/Clang >= v13.0.0-rc3 on my Debian/unstable AMD64 system. For details see ClangBuiltLinux issue #1452 (see [1]). The fix is pending in rdma.git#for-rc (see [2]): commit 3110b942d36b961858664486d72f815d78c956c3 "IB/qib: Fix clang confusion of NULL pointer comparison" Dunno if there was a pull-request from linux-rdma folks. Cannot say if it is worth taking this directly...? Just want to let you know. Regards, - Sedat - P.S.: My kernel-config is attached. [0] https://marc.info/?l=linux-kernel&m=163269130729304&w=2 [1] https://github.com/ClangBuiltLinux/linux/issues/1452 [2] https://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git/commit/?h=for-rc&id=3110b942d36b961858664486d72f815d78c956c3