From 463e6ebc86578ef3ff5bb500f6fc9449afaeea7e Mon Sep 17 00:00:00 2001 From: Mitko Haralanov Date: Fri, 5 Feb 2016 11:57:53 -0500 Subject: [PATCH] staging/hfi1: Convert lock to mutex The exp_lock lock does not need to be a spinlock as all its uses are in process context and allowing the process to sleep when the mutex is contended might be beneficial. Signed-off-by: Mitko Haralanov Reviewed-by: Ira Weiny Signed-off-by: Doug Ledford --- drivers/staging/rdma/hfi1/file_ops.c | 12 ++++++------ drivers/staging/rdma/hfi1/hfi.h | 2 +- drivers/staging/rdma/hfi1/init.c | 2 +- 3 files changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/staging/rdma/hfi1/file_ops.c b/drivers/staging/rdma/hfi1/file_ops.c index 76fe603..b0348263 100644 --- a/drivers/staging/rdma/hfi1/file_ops.c +++ b/drivers/staging/rdma/hfi1/file_ops.c @@ -1611,14 +1611,14 @@ static int exp_tid_setup(struct file *fp, struct hfi1_tid_info *tinfo) * reserved, we don't need the lock anymore since we * are guaranteed the groups. */ - spin_lock(&uctxt->exp_lock); + mutex_lock(&uctxt->exp_lock); if (uctxt->tidusemap[useidx] == -1ULL || bitidx >= BITS_PER_LONG) { /* no free groups in the set, use the next */ useidx = (useidx + 1) % uctxt->tidmapcnt; idx++; bitidx = 0; - spin_unlock(&uctxt->exp_lock); + mutex_unlock(&uctxt->exp_lock); continue; } ngroups = ((npages - mapped) / dd->rcv_entries.group_size) + @@ -1635,13 +1635,13 @@ static int exp_tid_setup(struct file *fp, struct hfi1_tid_info *tinfo) * as 0 because we don't check the entire bitmap but * we start from bitidx. */ - spin_unlock(&uctxt->exp_lock); + mutex_unlock(&uctxt->exp_lock); continue; } bits_used = min(free, ngroups); tidmap[useidx] |= ((1ULL << bits_used) - 1) << bitidx; uctxt->tidusemap[useidx] |= tidmap[useidx]; - spin_unlock(&uctxt->exp_lock); + mutex_unlock(&uctxt->exp_lock); /* * At this point, we know where in the map we have free bits. @@ -1677,10 +1677,10 @@ static int exp_tid_setup(struct file *fp, struct hfi1_tid_info *tinfo) * Let go of the bits that we reserved since we are not * going to use them. */ - spin_lock(&uctxt->exp_lock); + mutex_lock(&uctxt->exp_lock); uctxt->tidusemap[useidx] &= ~(((1ULL << bits_used) - 1) << bitidx); - spin_unlock(&uctxt->exp_lock); + mutex_unlock(&uctxt->exp_lock); goto done; } /* diff --git a/drivers/staging/rdma/hfi1/hfi.h b/drivers/staging/rdma/hfi1/hfi.h index 51ecf45..53f464c 100644 --- a/drivers/staging/rdma/hfi1/hfi.h +++ b/drivers/staging/rdma/hfi1/hfi.h @@ -258,7 +258,7 @@ struct hfi1_ctxtdata { struct exp_tid_set tid_full_list; /* lock protecting all Expected TID data */ - spinlock_t exp_lock; + struct mutex exp_lock; /* number of pio bufs for this ctxt (all procs, if shared) */ u32 piocnt; /* first pio buffer for this ctxt */ diff --git a/drivers/staging/rdma/hfi1/init.c b/drivers/staging/rdma/hfi1/init.c index 4dd8051..72c5143 100644 --- a/drivers/staging/rdma/hfi1/init.c +++ b/drivers/staging/rdma/hfi1/init.c @@ -227,7 +227,7 @@ struct hfi1_ctxtdata *hfi1_create_ctxtdata(struct hfi1_pportdata *ppd, u32 ctxt) rcd->numa_id = numa_node_id(); rcd->rcv_array_groups = dd->rcv_entries.ngroups; - spin_lock_init(&rcd->exp_lock); + mutex_init(&rcd->exp_lock); /* * Calculate the context's RcvArray entry starting point. -- 2.7.4