From 96fb9b88385f9b8b308cf2c8b050cd38ed038a59 Mon Sep 17 00:00:00 2001 From: Jack Morgenstein Date: Wed, 23 May 2018 15:30:30 +0300 Subject: IB/core: Make testing MR flags for writability a static inline function commit 08bb558ac11ab944e0539e78619d7b4c356278bd upstream. Make the MR writability flags check, which is performed in umem.c, a static inline function in file ib_verbs.h This allows the function to be used by low-level infiniband drivers. Cc: Signed-off-by: Jason Gunthorpe Signed-off-by: Jack Morgenstein Signed-off-by: Leon Romanovsky Signed-off-by: Greg Kroah-Hartman --- include/rdma/ib_verbs.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'include/rdma') diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 08f3d8699a27..5a24b4c700e5 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -3558,6 +3558,20 @@ static inline int ib_check_mr_access(int flags) return 0; } +static inline bool ib_access_writable(int access_flags) +{ + /* + * We have writable memory backing the MR if any of the following + * access flags are set. "Local write" and "remote write" obviously + * require write access. "Remote atomic" can do things like fetch and + * add, which will modify memory, and "MW bind" can change permissions + * by binding a window. + */ + return access_flags & + (IB_ACCESS_LOCAL_WRITE | IB_ACCESS_REMOTE_WRITE | + IB_ACCESS_REMOTE_ATOMIC | IB_ACCESS_MW_BIND); +} + /** * ib_check_mr_status: lightweight check of MR status. * This routine may provide status checks on a selected -- cgit v1.2.3