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Remove xpt_lock mutex.

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CAM does not require SIM locks for years, and obviously does not require
it for completely virtual XPT SIM.

MFC after:	2 weeks
This commit is contained in:
Alexander Motin 2019-11-22 18:55:27 +00:00
parent 8823960b8d
commit 7e8baf37e0
1 changed files with 1 additions and 6 deletions
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7
sys/cam/cam_xpt.c
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@ -128,7 +128,6 @@ struct xpt_softc {
struct root_hold_token xpt_rootmount;
struct mtx xpt_topo_lock;
struct mtx xpt_lock;
struct taskqueue *xpt_taskq;
};
@ -895,7 +894,6 @@ xpt_init(void *dummy)
STAILQ_INIT(&xsoftc.highpowerq);
xsoftc.num_highpower = CAM_MAX_HIGHPOWER;
mtx_init(&xsoftc.xpt_lock, "XPT lock", NULL, MTX_DEF);
mtx_init(&xsoftc.xpt_highpower_lock, "XPT highpower lock", NULL, MTX_DEF);
xsoftc.xpt_taskq = taskqueue_create("CAM XPT task", M_WAITOK,
taskqueue_thread_enqueue, /*context*/&xsoftc.xpt_taskq);
@ -920,21 +918,18 @@ xpt_init(void *dummy)
"xpt",
/*softc*/NULL,
/*unit*/0,
/*mtx*/&xsoftc.xpt_lock,
/*mtx*/NULL,
/*max_dev_transactions*/0,
/*max_tagged_dev_transactions*/0,
devq);
if (xpt_sim == NULL)
return (ENOMEM);
mtx_lock(&xsoftc.xpt_lock);
if ((status = xpt_bus_register(xpt_sim, NULL, 0)) != CAM_SUCCESS) {
mtx_unlock(&xsoftc.xpt_lock);
printf("xpt_init: xpt_bus_register failed with status %#x,"
" failing attach\n", status);
return (EINVAL);
}
mtx_unlock(&xsoftc.xpt_lock);
/*
* Looking at the XPT from the SIM layer, the XPT is