diff options
| author | Bob Pearson <rpearsonhpe@gmail.com> | 2021-05-27 14:47:46 -0500 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2021-06-03 15:53:01 -0300 |
| commit | 59daff49f25fbb3197c03c879e23a31ddd23d98f (patch) | |
| tree | 280429a279bac368f0982e47b01c33da32f9bb7c /drivers/infiniband/sw/rxe/rxe_cq.c | |
| parent | 50971e39154de296185b81a61eca25b3e2f55f3e (diff) | |
| download | lwn-59daff49f25fbb3197c03c879e23a31ddd23d98f.tar.gz lwn-59daff49f25fbb3197c03c879e23a31ddd23d98f.zip | |
RDMA/rxe: Add a type flag to rxe_queue structs
To create optimal code only want to use smp_load_acquire() and
smp_store_release() for user indices in rxe_queue APIs since kernel
indices are protected by locks which also act as memory barriers. By
adding a type to the queues we can determine which indices need to be
protected.
Link: https://lore.kernel.org/r/20210527194748.662636-2-rpearsonhpe@gmail.com
Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband/sw/rxe/rxe_cq.c')
| -rw-r--r-- | drivers/infiniband/sw/rxe/rxe_cq.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/infiniband/sw/rxe/rxe_cq.c b/drivers/infiniband/sw/rxe/rxe_cq.c index b315ebf041ac..1d4d8a31bc12 100644 --- a/drivers/infiniband/sw/rxe/rxe_cq.c +++ b/drivers/infiniband/sw/rxe/rxe_cq.c @@ -59,9 +59,11 @@ int rxe_cq_from_init(struct rxe_dev *rxe, struct rxe_cq *cq, int cqe, struct rxe_create_cq_resp __user *uresp) { int err; + enum queue_type type; + type = uresp ? QUEUE_TYPE_TO_USER : QUEUE_TYPE_KERNEL; cq->queue = rxe_queue_init(rxe, &cqe, - sizeof(struct rxe_cqe)); + sizeof(struct rxe_cqe), type); if (!cq->queue) { pr_warn("unable to create cq\n"); return -ENOMEM; |