This is a note to let you know that I've just added the patch titled xprtrdma: Squelch kbuild sparse complaint to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: xprtrdma-squelch-kbuild-sparse-complaint.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From eed50879d64ab1b9f76445dbab822e43a098b309 Mon Sep 17 00:00:00 2001 From: Chuck Lever <chuck.lever@xxxxxxxxxx> Date: Sat, 11 Mar 2017 15:52:47 -0500 Subject: xprtrdma: Squelch kbuild sparse complaint From: Chuck Lever <chuck.lever@xxxxxxxxxx> commit eed50879d64ab1b9f76445dbab822e43a098b309 upstream. New complaint from kbuild for 4.9.y: net/sunrpc/xprtrdma/verbs.c:489:19: sparse: incompatible types in comparison expression (different type sizes) verbs.c: 489 max_sge = min(ia->ri_device->attrs.max_sge, RPCRDMA_MAX_SEND_SGES); I can't reproduce this running sparse here. Likewise, "make W=1 net/sunrpc/xprtrdma/verbs.o" never indicated any issue. A little poking suggests that because the range of its values is small, gcc can make the actual width of RPCRDMA_MAX_SEND_SGES smaller than the width of an unsigned integer. Fixes: 16f906d66cd7 ("xprtrdma: Reduce required number of send SGEs") Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx> Signed-off-by: Anna Schumaker <Anna.Schumaker@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- net/sunrpc/xprtrdma/verbs.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/net/sunrpc/xprtrdma/verbs.c +++ b/net/sunrpc/xprtrdma/verbs.c @@ -486,7 +486,8 @@ rpcrdma_ep_create(struct rpcrdma_ep *ep, struct ib_cq *sendcq, *recvcq; int rc; - max_sge = min(ia->ri_device->attrs.max_sge, RPCRDMA_MAX_SEND_SGES); + max_sge = min_t(unsigned int, ia->ri_device->attrs.max_sge, + RPCRDMA_MAX_SEND_SGES); if (max_sge < RPCRDMA_MIN_SEND_SGES) { pr_warn("rpcrdma: HCA provides only %d send SGEs\n", max_sge); return -ENOMEM; Patches currently in stable-queue which might be from chuck.lever@xxxxxxxxxx are queue-4.9/xprtrdma-squelch-kbuild-sparse-complaint.patch