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| author | Jack Morgenstein <jackm@dev.mellanox.co.il> | 2018-05-23 15:30:30 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-07-03 11:24:53 +0200 |
| commit | 96fb9b88385f9b8b308cf2c8b050cd38ed038a59 (patch) | |
| tree | eafeb0d4d83f2c3605e648c533c8f84c6b120c71 /include | |
| parent | 1c82abc1b26ae3ce8c81f939e579b9e44452b81b (diff) | |
| download | linux-stable-96fb9b88385f9b8b308cf2c8b050cd38ed038a59.tar.gz linux-stable-96fb9b88385f9b8b308cf2c8b050cd38ed038a59.tar.bz2 linux-stable-96fb9b88385f9b8b308cf2c8b050cd38ed038a59.zip | |
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: <stable@vger.kernel.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/rdma/ib_verbs.h | 14 |
1 files changed, 14 insertions, 0 deletions
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 |