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rds: ib: Remove unused extern definition

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In the old days, RDS used FMR (Fast Memory Registration) to register
IB MRs to be used by RDMA. A newer and better verbs based
registration/de-registration method called FRWR (Fast Registration
Work Request) was added to RDS by commit 1659185fb4 ("RDS: IB:
Support Fastreg MR (FRMR) memory registration mode") in 2016.

Detection and enablement of FRWR was done in commit 2cb2912d65
("RDS: IB: add Fastreg MR (FRMR) detection support"). But said commit
added an extern bool prefer_frmr, which was not used by said commit -
nor used by later commits. Hence, remove it.

Signed-off-by: Håkon Bugge <haakon.bugge@oracle.com>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Link: https://patch.msgid.link/20250905101958.4028647-1-haakon.bugge@oracle.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Håkon Bugge 2025-09-05 12:19:57 +02:00 • committed by Jakub Kicinski
parent 6e0cca6ba3
commit 9f0730b063
1 changed files with 0 additions and 1 deletions
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1
net/rds/ib_mr.h
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@ -108,7 +108,6 @@ struct rds_ib_mr_pool {
};
extern struct workqueue_struct *rds_ib_mr_wq;
extern bool prefer_frmr;
struct rds_ib_mr_pool *rds_ib_create_mr_pool(struct rds_ib_device *rds_dev,
int npages);